A long-term cohort study of acitretin for prevention of keratinocyte carcinoma in solid organ transplant recipients

Squamous cell carcinoma in solid organ transplant recipients: Review of the literature

Solid organ transplant recipients (SOTRs) exhibit an elevated incidence and aggressiveness of squamous cell carcinomas (SCCs) due to their immunosuppression. These tumors are associated with a heightened risk of metastasis and increased mortality. Therefore, an appropriate management of these patients is essential to improve their prognosis. Given the scarcity of studies on non-melanoma skin cancers (NMSCs) in SOTRs, this article aims to summarize and analyze the evidence gathered to date regarding therapeutic approaches, personalized monitoring, and prevention strategies for SCCs in these patients. Additionally, recent advancements in understanding SCCs within this patient group are also documented.

Prognostic Outcomes of Cutaneous Squamous Cell Carcinoma in Solid Organ Transplant Recipients: A Retrospective Comparative Cohort Study

INTRODUCTION

Cutaneous squamous cell carcinoma (cSCC) is the second most common cutaneous neoplasm, and its incidence is on the rise. While most cSCCs have an excellent prognosis, certain risk factors, especially immunosuppression, have been associated with higher rates of local recurrence (LR), metastasis, and poor prognosis. This study aims to assess the risk factors for LR and metastasis development in cSCC among solid organ transplant recipients (SOTRs) and compare these rates with those in immunocompetent patients.

MATERIALS AND METHODS

A retrospective observational study included cSCC cases from the University Hospital Reina Sofía in Córdoba, Spain, between 2002 and 2019. Demographic, clinical, and histopathological data were collected. Local recurrence and metastasis rates were analyzed, along with progression-free survival. Univariate analyses were performed to identify prognostic factors in SOTRs.

RESULTS

Among 849 cSCC cases, we found higher rates of local recurrence and metastasis in tumors developed by SOTRs compared to those in immunocompetent individuals. However, no significant differences in local recurrence, metastasis, or progression-free survival were observed between the two groups. Risk factors for adverse outcomes in SOTRs included tumor size > 2 cm, depth > 4 mm, and a higher Clark level. A total of 34.4% of SOTRs developed a second primary cSCC during the follow-up.

CONCLUSIONS

In our study, cSCCs in SOTRs did not exhibit statistically significant differences in the rates of adverse outcomes compared to immunocompetent patients. The prognosis of cSCCs in SOTRs may be more related to other tumor-dependent risk factors than to the immunosuppression status itself. Future studies are needed to refine risk stratification and follow-up protocols to ensure the optimal management of high-risk cSCC cases, particularly among immunosuppressed patients.

Education and Perspectives on the Use of Oral Skin Cancer Chemoprophylaxis: A Cross-Sectional Survey of Current Fellows in Mohs Micrographic Surgery & Dermatologic Oncology

BACKGROUND

According to the curriculum guidelines of the Accreditation Council of Graduate Medical Education and the American Board of Dermatology, Mohs micrographic surgery & dermatologic oncology (MSDO) fellows must demonstrate competency in the use of oral skin cancer chemoprophylaxis. The current level of education in this area is unknown.

OBJECTIVE

To characterize oral skin cancer chemoprophylaxis education for acitretin and nicotinamide among current MSDO fellows and to compare the clinical indications felt most appropriate for prescribing to a previously published expert consensus.

METHODS

An electronic survey was distributed to all active MSDO fellows by the American College of Mohs Surgery.

RESULTS

Responses were received from 63 (69.2%) MSDO fellows. Twenty (31.7%) and 37 (58.7%) fellows reported receiving fellowship training on acitretin and nicotinamide, respectively. Fifty-seven (90.5%) intend to prescribe chemoprophylaxis after training. Sixteen (28.1%) and 43 (75.4%) report feeling very comfortable prescribing acitretin and nicotinamide, respectively. Fellow concordance with a previously published expert consensus opinion on appropriate prescribing indications is variable. Forty-one (65.1%) indicated that additional education would increase the likelihood to prescribe after training.

CONCLUSION

Although most MSDO fellows intend to prescribe oral skin cancer chemoprophylaxis, a standardized curriculum may promote increased use and concordance with expert consensus recommendations.

Safety of Immunomodulatory Systemic Therapies Used in the Management of Immune-Related Cutaneous Adverse Events

Immune-related cutaneous adverse events (ircAEs) commonly occur in patients on treatment with immune checkpoint inhibitors and can significantly reduce patient quality of life. These are often treated with immunomodulatory agents, including glucocorticoids, immunosuppressants, and biologics. While often effective at managing symptoms, these therapies can cause several adverse events which may limit their use. In addition, immunomodulatory agents should be used with particular caution in patients receiving immunotherapy, as the efficacy of the oncologic regimen may potentially be undermined. In this review, we summarize the safety of systemic therapies that are used in the management of ircAEs, with a particular focus on the resultant risk of secondary tumor progression in patients with active cancer.

Pharmacological Agents Used in the Prevention and Treatment of Actinic Keratosis: A Review

Actinic keratosis (AK) is among the most commonly diagnosed skin diseases with potentially life-threatening repercussions if left untreated. Usage of pharmacologic agents represents one of many therapeutic strategies that can be used to help manage these lesions. Ongoing research into these compounds continues to change our clinical understanding as to which agents most benefit particular patient populations. Indeed, factors such as past personal medical history, lesion location and tolerability of therapy only represent a few considerations that clinicians must account for when prescribing appropriate treatment. This review focuses on specific drugs used in either the prevention or treatment of AKs. Nicotinamide, acitretin and topical 5-fluorouracil (5-FU) continue to be used with fidelity in the chemoprevention of actinic keratosis, although some uncertainty persists in regard to which agents should be used in immunocompetent vs. immunodeficient/immunosuppressed patients. Topical 5-FU, including combination formulations with either calcipotriol or salicylic acid, as well as imiquimod, diclofenac and photodynamic light therapy are all accepted treatment strategies employed to target and eliminate AKs. Five percent of 5-FU is regarded as the most effective therapy in the condition, although the literature has conflictingly shown that lower concentrations of the drug might also be as effective. Topical diclofenac (3%) appears to be less efficacious than 5% 5-FU, 3.75-5% imiquimod and photodynamic light therapy despite its favorable side effect profile. Finally, traditional photodynamic light therapy, while painful, appears to be of higher efficacy in comparison to its more tolerable counterpart, daylight phototherapy.