Basal cell carcinoma: Epidemiology; pathophysiology; clinical and histological subtypes; and disease associations

The Role of the Neurotrophin Network in Skin Squamous Cell Cancer and the Novel Use of the Zebrafish System

Cutaneous squamous cell carcinoma (cSCC) is the second most prevalent form of skin cancer. An increasing number of cSCCs are associated with dysregulation of key molecules that control skin homeostasis. These observations have increased interest in the role of neurotrophins and their receptors in the pathogenesis of cSCC. They have been demonstrated to have a considerable impact on the aggressiveness potential of skin cancer by both in vitro and in vivo models. In this context, mouse models are classically used to dissect proliferation versus differentiation balance, but they have some limitations in terms of time, space, and costs. Recently, zebrafish models have been implemented as a new tool to obtain information regarding the invasive capacity and metastasis of neoplastic cells. By xenotransplantation technique, cSCC cells from a patient's biopsy or cell line can be successfully characterized, with or without the presence of genetic manipulation or treatments. In addition, the evaluation of the immune microenvironment contributes to potentially identifying connections and homologies with humans. In this review, we retrace the role of the neurotrophin network in healthy and pathological skin, particularly in cSCC. We review how zebrafish models can be important tools for studying cSCC development, growth, and potential treatments.

Body fat percentage vs body mass index in estimating basal cell carcinoma

Background

The role of body mass index (BMI) in basal cell carcinoma (BCC) risk remains controversial, and limited information is available regarding the relationship between other physical measurements and BCC. Several recent studies have found a positive effect of adiposity on improved survival when obesity was determined solely by BMI (the "obesity paradox"). We hypothesize that body fat percentage (BFP) may serve as a more sensitive risk factor for BCC than BMI.

Methods

The study conducted a retrospective analysis of clinical data from two distinct centers in China. Individual patient-level data were obtained from medical record reviews spanning January 1, 2015, to December 31, 2022. Associations with outcomes were analyzed using univariate and stratified analyses and assessed using multiple logistic regression with adjustment for confounding factors. Additionally, we performed a meta-analysis to further test the observations in our study.

Results

A total of 337 patients, ranging in age from 50 to 91 years, with a mean age of 66.88 (standard deviation 10.16), were included. We observed no significant association between BMI and BCC after adjusting for confounders (OR: 0.71, 95 % CI: 0.36-1.40, P = 0.3186). There was also no convincing effect in a meta-analysis (n = 158,741) (OR: 0.99, 95 % CI: 0.93-1.06, P = 0.8). Furthermore, BFP was found to be associated with BCC (OR: 2.64, 95 % CI: 1.17-5.97, P = 0.0196), supported by strong clinical evidence.

Conclusions

Our study supports the hypothesis that BFP is superior to BMI in assessing BCC risk. Multiple logistic regression analyses, coupled with meta-analysis, provided robust evidence that BFP is a sensitive risk factor for BCC, while BMI appears unrelated to risk. According to these findings, routine healthcare practices could benefit from utilizing BFP measurements. The reduction of body fat percentage in low-fat diets may be beneficial for adjuvant treatment of BCC.

Management Approaches for High-Risk Cutaneous Squamous Cell Carcinoma with Perineural Invasion: An Updated Review

OPINION STATEMENT

Cutaneous squamous cell carcinoma (cSCC) stands as the second most prevalent non-melanoma skin cancer worldwide, comprising approximately 20% of all cutaneous malignancies. Determining its precise incidence poses challenges; however, reports indicate a global increase in its prevalence. At the time of diagnosis, the majority of cSCCs are localized, resulting in favorable 5-year cure rates surpassing 90%. Nevertheless, a subset of patients (3-7%) encounters locally advanced or metastatic cSCC, leading to substantial morbidity and mortality. The risk of metastasis ranges from 0.1% to 9.9%, carrying an associated mortality risk of 2.8%. Factors influencing recurrence, metastasis, and disease-specific mortality underscore the significance of perineural invasion (PNI) as a key indicator. Patients with PNI may manifest clinical symptoms and/or radiologic signs of PNI, while the majority remain asymptomatic, and PNI is frequently identified upon histologic examination. Despite its lower frequency compared to other cancer types, PNI serves as a recognized adverse prognostic factor for cSCC. Surgery is the elective treatment for these patients, while the role of adjuvant radiotherapy (ART) is yet contentious and have not been conclusively assessed, particularly in clear surgical margin. Prospective comparative studies are required to comprehensively evaluate the benefit and the risks of ART for cSCC and PNI patients.

Quality of Life in Patients Affected by Facial Basal Cell Carcinoma: Prospective Longitudinal Pilot Study and Validation of Skin Cancer Index in Lithuanian Language

Purpose

Facial basal cell carcinoma (BCC) poses significant challenges due to its potential for local destruction and impact on quality of life (QoL). Continuous research is necessary to identify novel factors influencing the quality of life within this demographic across diverse cultural settings. The aims of this study were to translate, culturally adapt, and validate the Lithuanian version of Skin Cancer Index, subsequently utilizing this questionnaire in the pilot phase of the study to achieve the following: (1) identify the differences in short- and long-term QoL, (2) establish empirical correlations between SCI scores and aesthetic facial regions, evaluate the potential differences between age, gender, and tumor size groups.

Patients and Methods

A prospective longitudinal study was conducted with 100 consecutive patients. The SCI was translated into Lithuanian language, with a rigorous assessment of its psychometric properties to confirm validity. Alongside hypothesis testing, a detailed analysis of variables was conducted. Statistical techniques, including t-tests and ANOVA, were employed to compare scores across demographic and clinical groups, with effect size calculations for further interpretation.

Results

Our findings demonstrate that the Lithuanian SCI successfully fulfills the criteria established by the COSMIN checklist. Surgical treatment for facial BCC notably enhances QoL, particularly evident six months post-surgery. Analysis of SCI scores identified demographic and clinical factors associated with lower QoL, including female gender, treatment with skin plasty, and tumor sites in aesthetically sensitive areas like the cheek, nose, and eyelid.

Conclusion

The Lithuanian version of the SCI is a reliable and valid tool for assessing QoL in facial BCC patients. Our findings underscore the global relevance of understanding the multifactorial influences on QoL in BCC patients. Early diagnosis, less invasive treatment approaches, and tailored post-operative care are crucial in minimizing the psychological, social, and appearance-related burdens of facial BCC.

A large exophytic plaque on the shoulder of a skin of color patient

A 75-year-old Black man presented for evaluation of a skin lesion on his right shoulder. The lesion had been present for 3 months and was bleeding. A physical exam demonstrated a 2.7 cm exophytic, crusted, blue-to-purple plaque. A shave biopsy was performed, and histopathological examination revealed anastomosing strands of basaloid cells in the dermis, leading to a diagnosis of fibroepithelioma of pinkus (FeP). FeP is a rare variant of basal cell carcinoma. It typically presents as a solitary, pink, pedunculated papule on the lower back, but the presentation can vary. This case contributes to the scarce literature on the occurrence of FeP in skin of color populations. Here, we raise the possibility that FeP may present differently in skin of color patients compared to white patients. Greater clinician awareness can foster improved identification, management, and understanding of FeP in diverse populations.

A Multi-Dimensional Approach to Map Disease Relationships Challenges Classical Disease Views

The categorization of human diseases is mainly based on the affected organ system and phenotypic characteristics. This is limiting the view to the pathological manifestations, while it neglects mechanistic relationships that are crucial to develop therapeutic strategies. This work aims to advance the understanding of diseases and their relatedness beyond traditional phenotypic views. Hence, the similarity among 502 diseases is mapped using six different data dimensions encompassing molecular, clinical, and pharmacological information retrieved from public sources. Multiple distance measures and multi-view clustering are used to assess the patterns of disease relatedness. The integration of all six dimensions into a consensus map of disease relationships reveals a divergent disease view from the International Classification of Diseases (ICD), emphasizing novel insights offered by a multi-view disease map. Disease features such as genes, pathways, and chemicals that are enriched in distinct disease groups are identified. Finally, an evaluation of the top similar diseases of three candidate diseases common in the Western population shows concordance with known epidemiological associations and reveals rare features shared between Type 2 diabetes (T2D) and Alzheimer's disease. A revision of disease relationships holds promise for facilitating the reconstruction of comorbidity patterns, repurposing drugs, and advancing drug discovery in the future.

Dermoscopic features of pigmented basal cell carcinoma according to size

BACKGROUND

Basal cell carcinoma (BCC), the most common skin cancer in humans, requires early detection. Dermoscopy enhances diagnostic accuracy through a noninvasive approach. Pigmented BCC (pBCC) is characterized by distinctive dermoscopic features, including the presence of pigmented globules or nests. While dermoscopic features of large pBCC (size >6 mm) have been extensively studied, limited data are available on small pBCC (size ≤6 mm) and its relationship with tumor progression.

METHODS

Dermoscopic images of histologically proven pBCCs were collected between 2014 and 2022 at Hualien Tzu Chi Hospital. Each image was analyzed for patterns of pigmentation, vasculature, and epidermal and dermal structures. Statistical analysis was performed to compare the differences according to the size and the trend during tumor progression.

RESULTS

In total, 135 pBCCs (48 small and 87 large) were included. Pigment structures were present in all cases. Short fine telangiectasia and small erosions constituted over 85% of the cases, showing no significant distinction between small and large pBCCs, nor any specific pattern correlating with tumor enlargement. The number of arborizing vessels, ulcerations, and shiny white structures showed an increasing trend associated with size progression. Arborizing vessels appeared when tumor size exceeded 6 mm.

CONCLUSIONS

This study provides a dynamic interpretation of the dermoscopic features of pBCC according to size enlargement. Short fine telangiectasia and small erosions are highly important features for the early diagnosis of small pBCCs. Arborizing vessels, ulceration, and shiny white structures are more frequent in large pBCCs, and they increase in association with tumor progression.

High-Risk Non-Melanoma Skin Cancers: Biological and Therapeutic Advances

Nonmelanoma skin cancers (NMSCs) are the most common cancers, with high-risk NMSCs sharing features such as poor histologic differentiation, invasion into deeper layers, and anatomic location. NMSC includes basal cell carcinoma, cutaneous squamous cell carcinoma, and Merkel cell carcinoma. Herein, the authors describe advances in understanding the genetic mechanisms of malignant transformation and the composition of tumor microenvironment for these cancers. They summarize recent therapeutic advances, including targeted therapy and immunotherapy for NMSCs. Effective skin protection against ultraviolet radiation-induced carcinogenesis remains an urgent unmet need for NMSC prevention. The authors highlight immune-based interventions as novel strategies to address this need.

Giant Morpheaform Basal Cell Carcinoma Mimicking Scarring Alopecia: Exception Prone to Neglect

A 74-year-old woman in good general health presented with a 5-year history of progressive hair loss over several years, interpreted as female androgenetic alopecia (AGA), and was treated with topical 5% Minoxidil without improvement. The patient's relevant medical history revealed infiltrating, triple-negative apocrine carcinoma of the right breast four years before, treated by quadrantectomy, radiation, lymphadenectomy and chemotherapy, with no recurrence at the last follow-up. On examination, there was an asymptomatic 15 × 15 cm firm and whitish area of scarring alopecia on the central scalp. Dermoscopy revealed multiple arborizing vessels and many telangiectasia. The clinical considerations included mainly cutaneous metastasis of breast carcinoma (alopecia neoplastica), pseudopelade of Broque and morpheaform basal cell carcinoma (BCC). A histopathologic examination revealed characteristic changes of morpheaform BCC with basaloid islands and cords of atypical basaloid cells diffusely infiltrating the dermis, embedded in a sclerotic and hypervascularized stroma. Secondary alopecia neoplastica due to morpheaform BCC on the scalp is an exceedingly rare entity, possessing subtle clinical features that may mimic both scarring and non-scarring alopecia. Delayed recognition may contribute to aggressive behavior and extensive local destruction. Treatment with hedgehog inhibitors in locally advanced BCC of the scalp, both in adjuvant and neoadjuvant modalities, is promising.

Representation of skin carcinomas in public awareness - Awareness worldwide and in Germany

BACKGROUND AND OBJECTIVES

In recent years, there has been an increase in skin cancer. The aim of this study was therefore to investigate the representation of skin cancer in public awareness worldwide and in Germany, and to determine whether Skin Cancer Awareness Month is represented in the search interests of the Internet-using population in the same way as Breast Cancer Awareness Month worldwide.

DATA AND METHODS

In this study, Google Trends data were used to track levels of public awareness for different tumor entities and skin cancer types worldwide and for Germany.

RESULTS

The results of this analysis clearly showed a high level of relative public search interest in breast cancer worldwide in the awareness month of October. Worldwide and in Germany, there was a certain increase in search interest and a certain seasonal effect around the May awareness month for skin cancer. For example, the analysis showed a search interest in May and during the summer months in Germany.

CONCLUSIONS

It is likely that the population, for example in Germany, may benefit further from an even greater emphasis on the topic of skin cancer.

Repräsentation von Hautkarzinomen im öffentlichen Bewusstsein – Aufmerksamkeit weltweit und in Deutschland

Hintergrund und Zielsetzung

In den letzten Jahren ist eine Zunahme von Hauttumoren zu verzeichnen. Ziel dieser Studie war es daher, die Repräsentation von Hautkrebs im öffentlichen Bewusstsein weltweit und in Deutschland zu untersuchen und festzustellen, ob der Skin Cancer Awareness Month in den Suchinteressen der internetnutzenden Bevölkerung in gleicher Weise wie der Breast Cancer Awareness Month weltweit repräsentiert ist.

Daten und Methodik

In dieser Studie wurden die Daten von Google Trends verwendet, um den Grad der öffentlichen Aufmerksamkeit für verschiedene Tumorentitäten und Hautkrebsarten weltweit und in Deutschland zu ermitteln.

Ergebnisse

Die Ergebnisse dieser Analyse zeigten deutlich ein hohes Niveau für das relative öffentliche Suchinteresse am Thema Brustkrebs weltweit im Sensibilisierungsmonat Oktober. Weltweit und in Deutschland war ein gewisser Anstieg des Suchinteresses beziehungsweise ein gewisser saisonaler Effekt um den Sensibilisierungsmonat Mai für Hautkrebs festzustellen. So zeigte die Analyse beispielsweise ein Suchinteresse im Mai und während der Sommermonate in Deutschland.

Schlussfolgerungen

Es ist wahrscheinlich, dass die Bevölkerung, zum Beispiel in Deutschland, weiterhin von einer noch stärkeren Betonung des Themas Hautkrebs profitieren könnte.

Efficacy of micrographic surgery versus conventional excision in reducing recurrence for basal cell carcinoma and squamous cell carcinoma: A systematic review and meta-analysis

The standard of care for basal cell carcinoma (BCC) and squamous cell carcinoma (SCC) involves excision by conventional surgery (CS) with a predefined safety margin of resection or micrographic surgery (MS) with microscopic margin control. Previous studies have reported the superiority of MS in reducing recurrences for high-risk BCC and SCC. This systematic review aimed to assess MS and CS recurrence rates by including randomized clinical trials (RCTs) and cohort studies. A systematic review and meta-analysis were conducted for related studies in PubMed, LILACS, Embase, Scopus, Web of Science, CINHAL and Cochrane until May 2023. RCTs and cohorts involving patients with BCC or SCC submitted to MS and CS were included. Risk of bias assessment followed Cochrane-recommended tools for RCTs and cohorts, and certainty of evidence followed the GRADE approach. Pooled estimates were used to determine the relative risk (RR) and absolute risk difference (RD) using a random-effects model. Seventeen studies were included, two RCTs and fifteen cohorts. There were 82 recurrences in 3050 tumours submitted to MS, with an overall recurrence rate of 3.1% (95% CI 2.0%-4.7%). For CS, there were 209 recurrences in 3453 tumours, with a recurrence rate of 5.3% (95% CI 2.9%-9.3%). The combined estimate of RR was 0.48 (95% CI 0.36-0.63), without heterogeneity nor evidence of publication bias (p > 0.3). The RD resulted in 2.9% (95% CI 1.0%-4.9%; NNT = 35). Regarding subgroup analysis, the RR for BBC was 0.37 (95% CI 0.25-0.54), and RD was 3.7% (95% CI 0.8%-6.5%; NNT = 28). For SCC, RR was 0.57 (95% CI 0.29-1.13), and RD was 1.9% (95% CI 0.8%-4.7%; NNT = 53). Among primary tumours, RR was 0.39 (95% CI 0.28-0.54), and for recurrent tumours was 0.67 (95% CI 0.30-1.50). There is moderate evidence based on two RCTs, and low evidence based on 15 cohort studies that MS is superior to CS in reducing recurrences of BCCs and primary tumours. The development of protocols that maximize the cost-effectiveness of each method in different clinical scenarios is paramount.

Time to Mohs Reconstruction: A Systematic Review Comparing Complication Rates between Immediate and Delayed Repair

Several known factors affect outcomes of Mohs facial defect reconstruction; however, the effect of repair timing on outcomes is ill-defined. The aim of this study was to determine postoperative complication rates between immediate and delayed repair of Mohs facial defects. Preferred Reporting Items of Systematic Reviews and Meta-Analyses guidelines were used. Articles were selected using PICO format-population: Mohs facial defect patients, intervention: defect repair, comparator: immediate (<24 hours), or delayed (>24 hours) repair, outcome: complication rate. PubMed/Medline (1946-2020), EMBASE (1947-2020), Scopus (1823-2020), Web of Science (1900-2020), Cochrane Library, and Clinicaltrials.gov were searched. Two independent reviewers screened abstracts; those in English with human subjects reporting repair timing and complication rates were included. Search criteria yielded 6,649 abstracts; 233 qualified for review. Data were gathered from six studies; they alone contained comparative data meeting inclusion criteria. While many well-written studies were encountered, reported results varied widely. A statistically sound meta-analysis could not be completed due to large heterogeneity between studies, biasing the analysis towards the largest weighted study. Clinically important differences may exist between immediate and delayed Mohs reconstruction, but small study numbers, large heterogeneity, and lack of standardized outcome measures limit definitive conclusions. More studies are needed to perform appropriate meta-analyses, including studies using standardized methods of reporting Mohs outcome data.

Ultrasound features of high-risk basal cell carcinoma: a systematic review

Basal Cell Carcinoma (BCC) is the most prevalent skin cancer and continues to witness a surge in incidence rates. The categorization of BCC subtypes into low or high risk, guided by recurrence and invasiveness metrics, underscores the need for precise differentiation. While the punch biopsy remains the gold standard for diagnosis, its invasiveness prompts a need for non-invasive alternatives. Ultrasound (US) has emerged as a noteworthy candidate, gaining momentum in its potential to offer a less intrusive diagnostic approach. We conducted a systematic review regarding features of the high-risk subtypes of BCC on US. A thorough literature search of PubMed Medline, Embase, and CINAHL databases was conducted according to PRISMA guidelines and a total of nine studies meeting our inclusion criteria were included in this review. Evidence is still nascent but US features such as lesional shape, depth, hyperechoic spots, and color doppler may be helpful in differentiating high-risk BCC subtypes. However, further prospective studies with standardized interventions and outcome measures are required.

Understanding the Dermoscopic Patterns of Basal Cell Carcinoma Using Line-Field Confocal Tomography

Basal cell carcinoma (BCC) is the most frequent malignancy in the general population. To date, dermoscopy is considered a key tool for the diagnosis of BCC; nevertheless, line-field confocal optical coherence tomography (LC-OCT), a new non-invasive optical technique, has become increasingly important in clinical practice, allowing for in vivo imaging at cellular resolution. The present study aimed to investigate the possible correlation between the dermoscopic features of BCC and their LC-OCT counterparts. In total, 100 histopathologically confirmed BCC cases were collected at the Dermatologic Clinic of the University of Siena, Italy. Predefined dermoscopic and LC-OCT criteria were retrospectively evaluated, and their frequencies were calculated. The mean (SD) age of our cohort was 65.46 (13.36) years. Overall, BCC lesions were mainly located on the head (49%), and they were predominantly dermoscopically pigmented (59%). Interestingly, all dermoscopic features considered had a statistically significant agreement with the LC-OCT criteria (all p < 0.05). In conclusion, our results showed that dermoscopic patterns may be associated with LC-OCT findings, potentially increasing accuracy in BCC diagnosis. However, further studies are needed in this field.

Clinical versus Histological Assessment of Basal Cell Carcinoma Subtype and Thickness of Tumours Selected for Photodynamic Therapy

Photodynamic therapy is an approved treatment for primary, superficial, and small nodular basal cell carcinomas with a thickness of < 2 mm located on low-risk sites. Histologically verified basal cell carcinomas clinically assessed as suited for photodynamic therapy were included. The study aimed to investigate the agreement between clinical and histological assessments of basal cell carcinoma subtypes and thickness of tumours selected for photodynamic therapy with histopathological evaluation as a reference. A total of 343 tumours were included. The agreement between clinical and histological diagnosis of basal cell carcinoma subtype was 72% (p < 0.001). Clinical assessment of subtype had a sensitivity of 93% and specificity of 55% for superficial tumours and a sensitivity of 55% and specificity of 85% for nodular tumours. The mean ± SD thickness values by clinical and histological assessments were 0.95 ± 0.53 and 0.86 ± 0.75. The difference of 0.09 mm was statistically significant (p = 0.017), but not considered to be clinically relevant, although the differences between specific subgroups could be relevant. Among basal cell carcinomas clinically diagnosed as superficial, 91% were histologically consistent with the current photodynamic therapy criteria. The main results suggest that histopathological evaluation should precede photodynamic therapy to ensure selection of suitable basal cell carcinomas. In selected cases, the clinical diagnosis alone may be adequate before proceeding with photodynamic therapy.

Incidence of Nonmelanoma Skin Cancers in Alberta, Canada, From 2007 to 2018

BACKGROUND

Nonmelanoma skin cancer (NMSC) is the most common malignancy affecting Caucasian populations and has been seeing steady increases in incidence globally for decades. Our previous study (from Alberta, Canada) had shown a plateau in the incidence rates for NMSC. This contrasts with data from other regions within Canada and throughout the world that indicated a continued increase in incidence rates of NMSCs.

OBJECTIVES

The objective of this study was to provide an update on the trends in incidence of NMSC in Alberta, Canada, from 2007 to 2018.

METHODS

A retrospective analysis of patients from Alberta diagnosed with NMSC from 2007 to 2018 inclusive was conducted with data retrieved from Alberta Cancer Registry. Sex-, age-, anatomical location-, NMSC subtype-, stage-specific incidence rates and trends were examined.

RESULTS

From 2007 to 2018, overall incidence rates of NMSC increased by 36%. Invasive squamous cell carcinoma (SCC) and in situ SCC demonstrated the most significant increase, invasive SCC [annual percentage change (APC) 3.48, P = .014] and in situ SCC (APC 5.61, P = .0001). In addition, we were able to determine that females had the most significant increases in NMSC incidence rates from 2007 to 2018 particularly invasive SCC (APC 3.03, P = <.0001) and in situ SCC (APC 5.08, P = <.0001).

CONCLUSIONS

After initial levelling of NMSC incidence in Alberta in the early part of 21st century, the incidence of NMSC continues to increase over the past decade. The reasons for this change are not clear and likely multifactorial.

Cutaneous Superficial Basal Cell Carcinoma is a Basal Cell Carcinoma In Situ: Electron Microscopy of a Case Series of Basal Cell Carcinomas

Basal cell carcinoma (BCC) is the most common skin cancer. Skin cancers may present either as a non-invasive tumor or an invasive malignancy. The terminology of carcinoma in situ is used when the tumor is either just limited to epidermis or not present as single cells or nests in the dermis. However, currently the terminology superficial BCC is inappropriately used instead of BCC in situ when the skin cancer is limited to epidermis. In this study we compare the pathologic changes of superficial, nodular, and infiltrative BCCs using electron microscopy to identify the ultrastructural characteristics and validate the previously proposed terminology. Three cases of BCC (superficial BCC, nodular BCC, and infiltrative BCC) diagnosed by dermatopathologists at our institute were selected for review. Paraffin block tissues from these cases were sent for electron microscopy studies which demonstrated disruption of basal lamina in both nodular and infiltrative type of BCC, while it remains intact in BCC superficial type after extensive examination. Therefore, similar to other in situ skin cancers, there is no invasion of the neoplasm in superficial BCC into the dermis. Hence, the older term superficial BCC should be appropriately replaced with the newer terminology BCC in situ.

Treatments on the horizon for locally advanced basal cell carcinoma

Basal cell carcinoma (BCC) is one of the most common human cancers. Most cases of BCC are amenable to surgical and topical treatments with excellent prognosis if diagnosed timely and managed appropriately. However, in a small percentage of cases, it could be locally advanced BBC (laBCC) and not amenable to surgery or radiation, including recurrent, large tumors or tumors that invade deeper tissue. Hedgehog inhibitors (vismodegib and sonidegib) are approved as the first-line treatment of laBCC. PD-1 inhibitor immunotherapy (cemiplimab) is indicated for cases that progressed on or could not tolerate hedgehog inhibitors or when hedgehog inhibitors are contraindicated. Given the modest response and bothersome side effects of some of the agents above, there are reports of novel treatments, and clinical trials are currently evaluating multiple agents.

Immune cells in skin inflammation, wound healing, and skin cancer

Given the self-evident importance of cutaneous immunity in the maintenance of body-surface homeostasis, disturbance of the steady-state skin is inextricably intertwined with dysfunction in cutaneous immunity. It is often overlooked by people that skin, well-known as a solid physical barrier, is also a strong immunological barrier, considering the abundant presence of immune cells including lymphocytes, granulocytes, dendritic cells, and macrophages. What's more, humoral immune components including cytokines, immunoglobulins, and antimicrobial peptides are also rich in the skin. This review centers on skin inflammation (acute and chronic, infection and aseptic inflammation), wound healing, and skin cancer to elucidate the elaborate network of immune cells in skin diseases.

Patient-Orientated Evaluation of Treatment of Non-Melanoma Skin Cancer with Rhenium-188 Compared to Surgery

BACKGROUND

Non-melanoma skin cancers (NMSCs) are responsible for up to one-third of all human malignancies. Surgery is usually the treatment of choice, but patients often experience pain during the procedure. Topical rhenium-188 resin skin cancer treatment (RSCT) may be a valid therapeutic alternative.

METHODS

In this monocentric pilot study, 19 patients suffering from NMSC were treated with RSCT. Most of these patients had also experienced surgery, either because they developed a new NMSC in aftercare, or they had suffered previously from NMSC. Three RSCT-treated patients, who had no exposure to surgery so far, were paired with three matched patients, who had received surgery. We sought to evaluate and compare the patients' experience with both treatments. A questionnaire assessed patients' perceptions regarding side effects, aesthetic outcomes, wound care, fear of complications, and personal treatment preferences. Patients evaluated the different parameters of their either RSCT- or surgery-treated lesions on a scale from 0-10.

RESULTS

Patients were more afraid of complications before surgery than before RSCT (p = 0.04). Treatment with RSCT caused significantly less pain on treatment day (mean 0.56) than surgery (mean 2.32) (0 no pain, 10 maximum pain) (p = 0.02) and 14 days after the procedure (mean 0.89 versus mean 2.47) (p = 0.02). On day 14, RSCT-treated lesions were also significantly less itchy (mean 0.34) than after surgery (mean 1.50). Most patients were very satisfied with the aesthetic outcome after both RSCT (mean 8.42) and surgery (mean 8.31) (p = 0.89). In the case of a new NMSC, the majority of patients who experienced both treatments would rather be treated primarily with RSCT (44%) or would consider both options (31%); only 19% preferred surgery.

CONCLUSION

Patients evaluated RSCT as less painful than surgery. The aesthetic outcomes of both treatments were comparable. For pain-sensitive patients, RSCT might be a preferable treatment option.

Patient-reported outcome measurements in facial skin surgery and a comparison between Mohs micrographic surgery and conventional excisions

BACKGROUND

Knowledge of the psychosocial impact of facial skin surgery on patients can help improve counselling strategies.

OBJECTIVES

The objective was to measure the psychological impact of facial skin cancer surgery on patients over a 1-year period. Secondary objective was to measure the difference between Mohs micrographic surgery (MMS) and conventional excision (CE) on these parameters.

METHODS

This observational survey study was conducted between March 2019 and July 2020. Patients who had facial skin surgery using MMS or CE were selected. Five surveys were conducted on four timepoints (preoperative, 1 week, 3 months and 1 year post-operative) measuring the quality of life, perceived stigmatization, body image, satisfaction with facial appearance and psychosocial distress.

RESULTS

A total of 228 patients (MMS 154 patients, CE 74 patients) were included for the analysis. Scores for quality of life did not significantly change, in the year after surgery (PCS-12 mean 50.5, SD 9.3 and MCS-12 50.6, SD 9.4); however, stigmatization (F (3, 235,39) 7,26, p < 0.01, d = -0.07), body image concerns (F (3, 198,28) = 3.75, p < 0.01, d = -0.14), satisfaction with facial appearance (F (3, 205,18) = 10.74, p < 0.01, d = 0.43) and psychosocial distress (F (3, 208,69) = 9.26, p < 0.01, d = -0.15) did change over time. The use of MMS or CE did not significantly affect outcome scores after 1 year.

CONCLUSION

Patients receiving facial skin cancer surgery exhibited low scores for perceived stigmatization and body image concerns. Their quality of life was not statistically influenced by facial surgery, and their satisfaction with their facial appearance and psychosocial distress even improved after 1 year. The results suggest that the surgical treatment type (MMS or CE) does not influence the outcome. The overall results can help in counselling strategies to improve expectations for patients receiving facial surgery.

Using optical coherence tomography to optimize Mohs micrographic surgery

Mohs micrographic surgery (MMS) is considered the gold standard for treating high-risk cutaneous basal cell carcinoma (BCC), but is expensive, time-consuming, and can be unpredictable as to how many stages will be required or how large the final lesion and corresponding surgical defect will be. This study is meant to investigate whether optical coherence tomography (OCT), a highly researched modality in dermatology, can be used preoperatively to map out the borders of BCC, resulting in fewer stages of MMS or a smaller final defect. In this prospective study, 22 patients with BCC undergoing surgical excision were enrolled at a single institution. All patients had previously received a diagnostic biopsy providing confirmation of BCC and had been referred to our center for excision with MMS. Immediately prior to performing MMS, OCT was used to map the borders of the lesion. MMS then proceeded according to standard protocol. OCT images were compared to histopathology for agreement. Histopathologic analysis of 7 of 22 MMS specimens (32%) revealed a total absence of BCC, indicating resolution of BCC after previous diagnostic biopsy. This outcome was correctly predicted by OCT imaging in 6 of 7 cases (86%). Nine tumors (9/22, 41%) had true BCC and required a single MMS stage, which was successfully predicted by pre-operative OCT analysis in 7 of 9 cases (78%). The final six tumors (27%) had true BCC and required two MMS stages for complete excision; preoperative OCT successfully predicted the need for a second stage in five cases (5/6, 83.3%). Overall, OCT diagnosed BCC with 95.5% accuracy (Cohen's kappa, κ = 0.89 (p-value =  < 0.01) in the center of the lesion. Following a diagnostic biopsy, OCT can be used to verify the existence or absence of residual basal cell carcinoma. When residual tumor is present that requires excision with MMS, OCT can be used to predict tumor borders, optimize surgery and minimize the need for additional surgical stages.

Giant Basal Cell Carcinoma in a Renal Transplant Recipient: A Case Report

Basal cell carcinoma is a skin cancer with a more benign clinical course, compared to other skin cancers. However, when left neglected, it can cause serious morbidity and mortality. A basal cell carcinoma larger than 5 cm is defined as giant. Common causes of these carcinomas are negligence, immunosuppression, low socioeconomic status, physical or mental dysfunction, light exposure, exposure to radiation, existence of a previous lesion, recurrence after treatment, and aggressive histologic pattern. In some cases, giant basal cell carcinoma has been described to infiltrate multiple intracranial structures and to be associated with distant metastasis. Herein, we present a case of a giant basal cell carcinoma on the temporary scalp of a renal transplant recipient with depression.

Frequency and features of malignant tumors clinically mimicking cutaneous cysts: A retrospective chart review

BACKGROUND

Many cutaneous lesions are clinically suspected as "cyst"; however, following histopathological examination, are found to be more significant lesions. Here, we examine the frequency and features of malignancies with cutaneous cysts in the clinical differential.

METHODS

A retrospective study of surgical pathology specimens at the James A. Haley Veterans' Hospital from January 2018 to December 2022 was conducted. Cutaneous specimens containing the clinical diagnosis of "cyst" were included. The clinicopathological features were summarized.

RESULTS

Premalignant or malignant neoplasms accounted for 4.5% of all specimens submitted with cysts in the clinical differential. Most cyst-mimicking cancers were basal cell carcinoma (BCC) or squamous cell carcinoma (SCC); however, cancers with poorer prognoses, such as Merkel cell carcinoma and melanoma, also clinically masqueraded as cysts. The BCCs were predominately nodular, and the SCCs were largely well-differentiated and invasive. Many exhibited clinical signs and symptoms compatible with benign cysts, such as central punctum, pain, and rapid growth. Identified risk factors included history of prior non-melanoma skin cancer diagnosis, previous excision, and immunosuppression.

CONCLUSIONS

Many lesions clinically concerning cutaneous cysts were found to be malignancies following histopathological review. Accordingly, following biopsy all cyst-like lesions should be examined microscopically, especially in certain clinical contexts in which the incidence of skin cancer is increased.

Beyond the adverse effects of the systemic route: Exploiting nanocarriers for the topical treatment of skin cancers

Skin cancer is a heterogeneous disease that can be divided into two main groups, melanoma and nonmelanoma skin cancers. Conventional therapies for skin cancer have numerous systemic side effects and a high recurrence rate. Topical treatment is an alternative approach, but drug permeability remains a challenge. Therefore, nanocarriers appear as important nanotechnology tools that reduces both the side effects and improves clinical outcomes. This is why they are attracting growing interest. In this review, scientific articles on the use of nanocarriers for the topical treatment of skin cancer were collected. Despite the promising results of the presented nanocarriers and considering that some of them are already on the market, there is an urgent need for investment in the development of manufacturing methods, as well as of suitable toxicological and regulatory evaluations, since the conventional methods currently used to develop these nanocarriers-based products are more time-consuming and expensive than conventional products.

Photodynamic Therapy for the Treatment of Basal Cell Carcinoma: A Comprehensive Review of Randomized Controlled Trials

INTRODUCTION

Basal cell carcinoma (BCC) is the most common skin cancer worldwide and has been reported to have a rising incidence in the last years. Multiple therapeutic modalities are approved for the treatment of BCC, making it difficult for physicians to choose the most suitable option for every patient. Photodynamic therapy (PDT) using either 5-aminolevulinic acid (ALA) or methyl aminolevulinate (MAL) as photosensitizing agents is an established treatment option for low-risk BCC.

OBJECTIVES

This review aims to summarize the available evidence from randomized clinical trials (RCTs) that utilize either ALA or MAL PDT and compare it with other treatment modalities. The main outcomes related to the effectiveness, adverse events, cosmetic outcomes and pain sensation, along with data from long-term follow-ups will be presented and discussed.

METHODS

Thorough literature searches were conducted through the electronic databases ClinicalTrials. gov and Pubmed/MEDLINE from inception up to 28 March 2023. Only studies in English were included. All relevant data were extracted accordingly from the eligible studies.

RESULTS

Eight RCTs included superficial BCC (sBCC) alone, 7 included nodular BCC (nBCC), 2 included both sBCC and nBCC and 1 included BCC of unspecified subtype. Follow-up duration ranged from 3 months to 5 years. Both ALA-PDT and MAL-PDT demonstrated acceptable efficacy, adverse events, cosmetic outcomes and pain sensation while no major differences were observed between them. PDT was less effective than surgery but with better reported cosmetic outcomes.

CONCLUSIONS

PDT is a safe and efficacious treatment option for sBCC and to a lesser extent nBCC.

From the Cochrane Library: Visual Inspection and Dermoscopy, Alone or in Combination, for Diagnosing Keratinocyte Skin Cancers in Adults

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Nanotechnology as a Promising Method in the Treatment of Skin Cancer

The incidence of skin cancer continues to grow. There are an estimated 1.5 million new cases each year, of which nearly 350,000 are melanoma, which is often fatal. Treatment is challenging and often ineffective, with conventional chemotherapy playing a limited role in this context. These disadvantages can be overcome by the use of nanoparticles and may allow for the early detection and monitoring of neoplastic changes and determining the effectiveness of treatment. This article briefly reviews the present understanding of the characteristics of skin cancers, their epidemiology, and risk factors. It also outlines the possibilities of using nanotechnology, especially nanoparticles, for the transport of medicinal substances. Research over the previous decade on carriers of active substances indicates that drugs can be delivered more accurately to the tumor site, resulting in higher therapeutic efficacy. The article describes the application of liposomes, carbon nanotubes, metal nanoparticles, and polymer nanoparticles in existing therapies. It discusses the challenges encountered in nanoparticle therapy and the possibilities of improving their performance. Undoubtedly, the use of nanoparticles is a promising method that can help in the fight against skin cancer.

Malignant wound aetiology, diagnosis and management: a case series and literature review

OBJECTIVE

Malignant wounds develop when neoplastic cells invade the skin either locally or by lymphatic and haematogenous spread. They can present as hard-to-heal wounds and underlying causes include: primary skin cancer; metastasis of extracutaneous primary malignancy; malignant transformation of a hard-to-heal wound; iatrogenic injury; and cutaneous forms of cancers of non-skin origin. High clinical suspicion for a malignant wound should be confirmed with skin biopsy. The aim of this case series is to highlight a combination of both clinically clear cutaneous malignancies and not-so-obvious wounds caused by malignancy.

METHOD

This case series examines patients with malignant wounds of varying aetiology and appearance. For each case, we explain the pathophysiology, atypical features, diagnostic approach and treatment. We also discuss types of wound biopsy and general wound management principles.

RESULTS

Among the 11 cases analysed using descriptive statistics, median wound duration before presentation at our clinic was one year, while median age at presentation was 65 years. Our case series included the following diagnoses: cutaneous metastasis of invasive ductal carcinoma of the breast (n=2); cutaneous metastasis of colorectal adenocarcinoma (n=1); Marjolin's ulcer (n=1), basal cell carcinoma (BCC) (n=2), primary cutaneous squamous cell carcinoma (SCC) (n=1), metastatic malignant melanoma (n=1), cutaneous T-cell lymphoma (n=1), cutaneous angiosarcoma (n=1), Kaposi sarcoma (n=1) and recurrent tonsillar SCC with osteoradionecrosis (n=1); one case had both BCC and SCC.

CONCLUSION

Punch and excisional biopsies were the most frequently used diagnostic techniques. Local wound therapy addressed bleeding, malodour, exudate, pain and infection. However, wound healing is usually achieved once the underlying malignancy is treated. In advanced or metastatic disease, palliative wound care aims to prevent exacerbation of existing wounds and focuses on patient comfort.

Photodynamic therapy for nodular basal cell carcinoma up to 5mm located on high-risk area: Effectiveness and long-term follow-up results

SIGNIFICANCE

Response rates evaluation of photodynamic therapy (PDT) for nodular basal cell carcinoma (BCC) treatment located on high-risk and low-risk areas of the face.

APPROACH

Two groups of nodular BCC were selected, debulked, and received 20% methyl aminolevulinate (MAL) hydrochloride cream. After 3 h, the first irradiation was performed (20 min, 150 J/cm2). Then, the cream was re-applied, and a second irradiation was performed after 1.5 h (20 min, 150 J/cm2). Clearance at 30 days and recurrence-free survival rate were evaluated.

RESULTS

The clearance at 30 days after PDT was 89% for the low-risk area group and 87% for the high-risk group. The recurrence-free survival at 60 months was 82% and 85% for the high-risk and low-risk groups, respectively.

CONCLUSIONS

No significant differences were observed between groups nor for clearance at 30 days, nor recurrence-free follow-up. These results make PDT possible option for nodular BCC less than 5 mm located in high-risk areas.

Can the Safe Surgical Margin Be Narrowed in Early-Stage Facial Basal Cell Carcinoma?

OBJECTIVE

To examine factors that affect the positive surgical margins of facial basal cell carcinoma (BCC) and investigate whether the surgical margin value can be narrowed in early-stage facial BCCs.

METHODS

Ninety-five patients were divided into the three groups based on prognosis: good (n = 48), mixed (n = 32), and poor (n = 15). The good prognosis group (group 1) included nodular and superficial subtypes; the mixed prognosis group (group 2) included nodular-infiltrative, nodular-micronodular, and nodular-sclerosing subtypes; and the poor prognosis group (group 3) included infiltrative and micronodular subtypes.

RESULTS

Groups 1 and 2 differed from each other significantly in terms of positive surgical margin (P = .002) and tumor thickness (P = .008), but group 3 did not (P = .851 and P = .804, respectively). With regard to surgical method (primary vs local flap repair), only tumor localization varied significantly (P < .001).

CONCLUSIONS

Groups differed significantly in terms of surgical margin positivity, the distance of the tumor to the surgical margin, and the tumor thickness. The intact surgical margin was 2 mm on average in this study, and the authors suggest that it may be possible to revise the surgical margin values recommended in the literature.

Risk factors for developing depressive symptoms in the immediate postoperative period after Mohs micrographic surgery

PURPOSE

Mohs micrographic surgery (MMS) is a highly efficacious, tissue sparing method of skin cancer removal. Nevertheless, in the months to years after MMS, psychosocial distress has been described. The present study addressed the immediate period after MMS and assessed the frequency and risk factors for development of depressive symptoms.

METHODS

Subjects undergoing MMS at two physician practices (JL, FS) were included in this prospective cohort study. Preoperatively, a standardized depression screening, the Patient Health Questionnaire-8 (PHQ-8), was administered. After MMS, the PHQ-8 was readministered at weeks 1, 2, 4, 6, and 12. Average PHQ-8 score by week and change from baseline PHQ-8 score were the primary outcomes.

RESULTS

Sixty-three subjects were included of which 49 (78%) had a facial site. Twenty-two subjects (35%) had some increase in score during the 12-week follow-up period, of which 18 had a facial site. The oldest subjects (83-99 years, n = 14) had significantly higher PHQ-8 scores at week 4 (p < 0.01) and week 6 (p = 0.02) than all other age groups. There were no differences in scores between location groups.

CONCLUSIONS

One-third of subjects had some increase in score during the follow-up period. Those in the oldest age cohort were at highest risk of increased score. In contrast to prior literature, those with facial sites were not at higher risk. This difference may be explained by increased masking during the ongoing COVID-19 pandemic. Ultimately, consideration of patients' psychologic status in the immediate postoperative period after MMS, particularly in the elderly population, may enhance perceived patient outcomes.

Diagnosing and Managing Venous Stasis Disease and Leg Ulcers

Venous insufficiency is a common medical condition that affects many individuals, especially those with advanced age. Chronic venous insufficiency can lead to secondary cutaneous changes that most commonly present as stasis dermatitis but can progress to more serious venous ulcers. Although venous ulcers are the most common cause of lower extremity ulcers, the differential diagnosis of leg ulcers is broad. This article will discuss clinical clues to help guide patient workup and will review basic clinical evaluation and management of common leg ulcers.

Common Skin Cancers in Older Adults Approach to Diagnosis and Management

Skin cancers are the most common malignancies to affect older adults. The most common skin cancers, basal and squamous cell carcinoma, can usually be cured with surgery. Although less common, melanoma can be deadly when not caught in its earliest stages.

Tirbanibulin ointment to manage recurrence of superficial basal cell carcinoma of the face: case report

We present the case of a 64-year-old woman who presented to our clinic with a recurrence of superficial basal cell carcinoma to the left subocular region: the patient had been treated surgically about 4 months previously. Dermoscopy examination showed focal ulceration, linear and arborizing (branch-like) telangiectasia. The patient refused another surgical or topical treatment, such as imiquimod, or photodynamic therapy, for fear of related side effects. After discussing with the patient, we decided to start treatment with tirbanibulin ointment according to the schedule for actinic keratosis, once daily for 5 days.

Advances in Diagnosis and Treatment of Basal Cell Carcinoma

Basal cell carcinoma (BCC) is one among the most prevalent malignant neoplasms that has exhibited a notable surge in global incidence over recent decades. This slow-growing malignancy is typified by its localized invasiveness while demonstrating an exceedingly rare metastatic proclivity. It predominantly afflicts the sun-exposed skin of aging individuals, with a heightened predilection for the maxillofacial region. Scraping cytology offers numerous benefits, including the potential for an earlier diagnosis and the absence of scarring, as opposed to a biopsy. The cytodiagnosis of BCC proves to be straightforward with various techniques, making it highly advantageous in an outpatient environment as a swift diagnostic method when planning a surgical excision. Our study sought to scrutinize the clinicopathological facets of BCC within the maxillofacial region. We compared advanced cytological techniques for diagnosis, including scraping, scratching, and imprinting using Papanicolau and Diff-Quick stains. In addition, we evaluated the therapeutic effectiveness of diode lasers operating at wavelengths of 940nm and 980n. A retrospective analysis was undertaken, encompassing facial BCC lesions smaller than 2.5 cm in diameter that underwent treatment through diode laser ablation between September 2021 and August 2023 at Ramadi Teaching Hospital and a private clinic in Ramadi City, Iraq. Among the cohort of 48 patients with BCC, a majority (58%) were 50 years of age or older, with a predominance of males (62%). The mean duration of lesion existence exceeded 4 months. The anatomical region most commonly involved was the middle 1/3 of the face, accounting for 34% of cases. Intriguingly, the therapeutic approach of diode laser ablation yielded exceptional esthetic and functional outcomes, which were consistently observed throughout the follow-up period post-healing. The occurrence of complications following diode laser ablation was relatively infrequent. This investigation revealed that cytological examination is easily conducted, eliminating the need for local anesthesia, saving time, being more cost-effective than a conventional biopsy, and delivering swift diagnoses. The process of smear-taking for cytology is well-tolerated, inflicting minimal trauma or discomfort on the patient. BCC predominantly afflicts elderly males and most frequently affects the middle third of the face. Notably, nodular BCC emerged as the prevailing histological subtype. The use of diode laser ablation exhibited a commendable track record, producing exemplary functional and esthetic outcomes over a 6-month follow-up period.

Estimating remaining life expectancy in veterans with basal cell carcinoma using an automated electronic health record scoring system: A retrospective cohort study

BACKGROUND

Active surveillance may be considered for low-risk basal cell carcinomas (BCCs) in patients with limited life expectancy; however, estimates of life expectancy are not readily available. Veterans Health Administration's Care Assessment Need (CAN) score may address this problem.

OBJECTIVE

We examined the CAN score's performance in predicting 1-, 3-, and 5-year mortality in US veterans with BCC.

METHODS

This retrospective cohort study used national Veterans Health Administration's electronic medical record data. The CAN score's performance in the prediction of mortality in veterans with BCC was evaluated based on tests of goodness-of-fit, discrimination, and calibration.

RESULTS

For 54,744 veterans with BCC treatment encounters between 2013 and 2018, the CAN score performed well in the prediction of mortality based on multiple tests. A threshold CAN score of 90 had a positive predictive value of 55% for 3-year mortality, clinically useful in identifying patients with intermediate-term survival.

LIMITATIONS

The study relied upon the combination of diagnosis codes and procedure codes to identify BCC cases.

CONCLUSION

The CAN score has the potential to improve the quality of cancer care for veterans by providing clinicians with an estimate of life expectancy and facilitating conversations in cases where active surveillance can be considered.

Survival of patients with basal cell carcinoma, squamous cell carcinoma, and squamous cell carcinoma in situ: A whole population study

BACKGROUND

Keratinocyte carcinoma (KC) is the commonest type of malignancy in humans; however, the impact of KC on survival is poorly understood.

OBJECTIVES

This study characterizes the impact of basal cell carcinoma (BCC), squamous cell carcinoma (SCC), and squamous cell carcinoma in situ (SCCis) on the survival of Icelanders.

METHODS

This whole population study evaluated relative survival of KC in Iceland by using a cancer registry containing records of all BCC, SCCis, and SCC cases recorded in Iceland between 1981 and 2015.

RESULTS

Between 1981 and 2015, 8767 Icelanders were diagnosed with their first localized KC. A total of 6473 individuals with BCC, 1194 with SCCis, and 1100 with invasive SCC, respectively. BCC was not associated with decreased survival except for men diagnosed with BCC between 1981 and 1995 for whom decreased 10-year relative survival was observed (85.3, 95% CI [77.9-92.7]). SCC and SCCis were both associated with a decrease in relative survival for certain population subgroups such as individuals <50 years of age at time of diagnosis.

CONCLUSION

Our whole population cohort survival study examining the Icelandic Cancer Registry supports prior studies demonstrating that BCC is not associated with a reduction in relative survival and that SCC and SCCis are associated with comparatively poor relative survival in certain population subgroups.

A Review of the Dermatologic Clinical Applications of Topical Photodynamic Therapy

Topical photodynamic therapy is a widely approved therapy for actinic keratoses and low-risk nonmelanoma skin cancers with a rapidly growing range of emerging indications for other cutaneous diseases. This review summarizes the best-available evidence to provide a clinical update for dermatologists on the approved and emerging indications of photodynamic therapy. The body of evidence suggests that photodynamic therapy is superior or noninferior to other available treatment modalities for actinic keratoses, low-risk basal cell carcinomas, Bowen's disease, skin field cancerization, chemoprevention of keratinocyte carcinomas in organ transplant recipients, photoaging, acne vulgaris, and cutaneous infections including verrucae, onychomycosis, and cutaneous leishmaniasis. There is emerging evidence that photodynamic therapy plays a role in the management of actinic cheilitis, early-stage mycosis fungoides, extramammary Paget disease, lichen sclerosis, and folliculitis decalvans but there are no comparative studies with other active treatment modalities. Common barriers to topical photodynamic therapy include procedural pain, costs, and the time required for treatment delivery. There is significant heterogeneity in the photodynamic therapy protocols reported in the literature, including different photosensitizers, light sources, number of treatments, time between treatments, and use of procedural analgesia. Topical photodynamic therapy should be considered in the management of a spectrum of inflammatory, neoplastic, and infectious dermatoses. However, more comparative research is required to determine its role in the treatment algorithm for these dermatologic conditions and more methodological research is required to optimize photodynamic therapy protocols to improve the tolerability of the procedure for patients.

Incidence of Non-Melanoma Skin Cancers in Salento (Southern Italy): A 15-Year Retrospective Analysis from the Cancer Registry of Lecce

BACKGROUND AND OBJECTIVES

Non-melanoma skin cancers (NMSCs) include basal cell carcinoma (BCC) and squamous-cell carcinoma (SCC), as well as a wide range of rare skin tumors. NMSCs is the most frequently diagnosed type of tumor among Caucasians. We aimed at estimating the incidence and mortality of NMSCs in the Salento area (Lecce province, Southern Italy), whose population is assumed to experience heavy and frequent sun exposure due to climatic/environmental factors, both for working and leisure activities.

MATERIALS AND METHODS

We computed the incidence of NMSCs in the Province of Lecce by examining the comprehensive real-world data collected by the local cancer registry, which covers all the 830,000 inhabitants, over a period of fifteen years (from 2003 to 2017), with a focus on the latest 5 years (2013-2017) for the analysis of the different histologic morphologies of these tumors. The incidence of NMSCs has been described in terms of absolute frequencies, crude rates and age-adjusted direct standardized rates (DSR). Joinpoint analysis was used to examine temporal trends in the incidence of NMSCs and estimate annual percent changes (APCs).

RESULTS

During the period of 2003-2017, the incidence of NMSCs reached a direct standardized rate (DSR) of 162.62 per 100,000 in men (mortality 1.57 per 100,000) and 89.36 per 100,000 in women (mortality 0.52 per 100,000), respectively. The incidence significantly increased among both men and women across the entire period. Basal cell carcinoma (BCC), with its different morphologies, represented about 67.6% of the NMSCs in men (n = 2139 out of a total of 3161 tumors observed between 2013 and 2017) and about 75.8% of the NMSCs in women (n = 1718 out of a total of 2264 tumors from 2013 to 2017), thus accounting for the vast majority of NMSCs. The results are consistent with the literature data carried out both at national and international level.

CONCLUSIONS

Proper monitoring of this phenomenon through timely reporting and recording of all new NMSC cases is necessary to develop new preventive strategies.

Skin Malignancies: Imaging Review with Radiologic-Histopathologic Correlation

Skin malignancies are commonly encountered as primary or incidental findings. Neoplasms that affect the skin include primary (basal cell carcinoma, squamous cell carcinoma, melanoma, and Merkel cell carcinoma) and secondary (mesenchymal neoplasms, lymphoma, and metastases) tumors. Imaging provides valuable anatomic information (tumor size, depth of involvement, presence of distant metastasis, and data for guiding biopsy) and functional information (metabolic activity and sentinel node mapping data). This information, in addition to biopsy results, improves the histopathologic characterization of tumors and treatment planning. Various histopathologic types of the same entity exhibit different biologic behavior and have different imaging features. Familiarity with the multimodality imaging features, histopathologic characteristics, and various modes of dissemination (direct invasion; perineural, lymphatic, and hematogenous spread) of the most common skin malignancies helps radiologists narrow the differential diagnosis in clinical practice. ©RSNA, 2023 Supplemental material is available for this article. Quiz questions for this article are available through the Online Learning Center.

Micronodular Basal Cell Carcinoma Presenting as an Achromic Macule

A 63-year-old woman with light skin and a history of chronic sun damage presented with a painless, pale macule on her nasal tip. A punch biopsy was performed due to concerns about skin conditions like vitiligo or morpheaform basal cell carcinoma (BCC). The biopsy confirmed a micronodular BCC, an unusual presentation, as these typically manifest as an erythematous macule or thin papule/plaque. This report highlights the importance of considering various factors and differential diagnoses to ensure the best patient care and the need for vigilance in diagnosing rare presentations of BCC.

Tirbanibulin: an alternative topical approach to manage superficial basal cell carcinoma. Comment on: 'Successful treatment of field cancerization on the dorsum of the hands with 1% tirbanibulin ointment'

We read with great interest the article recently published by Abril-Pérez et al. in which they present a case of successful treatment of refractory actinic keratoses and field cancerization on the dorsum of the hands using 1% tirbanibulin ointment in a patient with sun-exposed and damaged skin. We think the case presented by the authors is very useful and we agree with many aspects of it and we wanted to report our own experience of using this drug for another dermatological cancer pathology, basal cell carcinoma.

Image-guided superficial radiation therapy has superior 2-year recurrence probability to Mohs micrographic surgery

Introduction

Non-melanoma skin cancers (NMSCs) are the most common cancers in the USA, and their incidence is rising. Mohs micrographic surgery (MMS) is commonly performed to excise NMSCs. MMS replaced superficial radiotherapy (SRT) as a first line treatment, given its superior efficacy. Image-guided superficial radiation therapy (IGSRT) was invented to improve the precision of SRT. This study investigates how the 2-year recurrence probability of IGSRT-treated NMSCs compares to that of MMS-treated lesions.

Methods

This retrospective cohort study compared the 2-year recurrence probability of early stage NMSCs (squamous and basal cell carcinomas (SCCs and BCCs)) treated by IGSRT (2,286 lesions) to data on NMSCs treated by MMS (5,391 lesions) via one sample proportion tests. Medical Subject Headings were used to search PubMed for reports of 2-year recurrence probability rates of NMSCs treated by MMS. Seventeen studies were screened; 14 studies were excluded for lack of 2-year time to event analysis, or irrelevant patient population (non-BCC/SCC study, advanced disease), leaving 3 studies for comparison.

Results

IGSRT-treated NMSCs have a statistically significantly improved 2-year recurrence probability than those treated by MMS, P < 0.001 for pooled data.

Conclusion

The 2-year recurrence probability IGSRT-treated NMSCs is superior to MMS-treated and supports IGSRT as an effective treatment option for individuals with early stage NMSCs.