Failure of carbon dioxide laser treatment in three patients with penoscrotal extramammary Paget's disease

Anatomic Subtype Differences in Extramammary Paget Disease: A Meta-Analysis

Importance

Extramammary Paget disease (EMPD) is a rare, highly recurrent cutaneous malignant neoplasm of unclear origin. EMPD arises most commonly on the vulvar and penoscrotal skin. It is not presently known how anatomic subtype of EMPD affects disease presentation and management.

Objective

To compare demographic and tumor characteristics and treatment approaches for different EMPD subtypes. Recommendations for diagnosis and treatment are presented.

Data Sources

MEDLINE, Embase, Web of Science Core Collection, and Cochrane Reviews CENTRAL from December 1, 1990, to October 24, 2022.

Study Selection

Articles were excluded if they were not in English, reported fewer than 3 patients, did not specify information by anatomic subtype, or contained no case-level data. Metastatic cases on presentation were also excluded.

Data Extraction and Synthesis

Abstracts of 1295 eligible articles were independently reviewed by 5 coauthors, and 135 articles retained. Reporting was in accordance with Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) reporting guidelines. The analysis was cunducted in August 2019 and updated in November 2022.

Findings

Most vulvar EMPD cases were asymptomatic, and diagnosis was relatively delayed (mean, 25.1 months). Although most vulvar EMPD cases were intraepidermal (1247/1773 [70.3%]), radical surgeries were still performed in almost one-third of cases. Despite this aggressive surgical approach, 481 of 1423 (34%) recurred, commonly confined to the skin and mucosa (177/198 [89.4%]). By contrast, 152 of 1101 penoscrotal EMPD cases (14%) recurred, but more than one-third of these recurrences were regional or associated with distant metastases (54 of 152 [35.5%]). Perianal EMPD cases recurred in one-third of cases (74/218 [33.9%]), with one-third of these recurrences being regional or associated with distant metastasis (20 of 74 [27.0%]). Perianal EMPD also had the highest rate of invasive disease (50% of cases).

Conclusions and Relevance

The diagnosis and treatment of EMPD should differ based on anatomic subtypes. Considerations for updated practice may include less morbid treatments for vulvar EMPD, which is primarily epidermal, and close surveillance for local recurrence in vulvar EMPD and metastatic recurrence in perianal EMPD. Recurrences in penoscrotal subtype were less common, and selective surveillance in this subtype may be considered. Limitations of this study include the lack of replication cohorts and the exclusion of studies that did not stratify outcomes by anatomic subtype.

Photodynamic therapy in the treatment of extramammary paget’s disease

Extramammary Paget’s disease (EMPD) is a rare tumor that predominantly affects the skin containing apocrine glands. Due to insufficient data on the effectiveness of different methods, there is no single therapeutic approach to the treatment of patients with EMPD and their subsequent management. The use of surgical methods, laser therapy and local cytotoxic drugs has a number of limitations. The advantages of using photodynamic therapy (PDT) in EMPD are the absence of systemic toxicity, non-invasiveness, selectivity of action, the absence of carcinogenic potential, the possibility of conducting several courses of treatment, and good cosmetic results. In our review, we analyzed those published in 2000-2022 data on the results of PDT treatment of 114 patients with EMPD. As a result of treatment, complete regression of tumor foci was achieved in 40% of patients. Most authors note that PDT is more effective for small areas (up to 4 cm2).

Extramammary Paget's Disease of genitourinary origin

PURPOSE OF REVIEW

Extramammary Paget's Disease (EMPD) is an uncommon intra-epithelial malignancy, affecting primarily apocrine gland-bearing skin. EMPD is often considered an orphan diagnosis given its rarity. This review provides a contemporary overview of EMPD management.

RECENT FINDINGS

The mainstay of EMPD treatment centers around a high index of suspicion to allow for an early and accurate diagnosis, wide local or Mohs micrographic surgical excision with care paid toward the margin status, and thoughtful consideration for lymphadenectomy in patients with clinically positive regional disease. There is currently no consensus regarding adjuvant therapies or systemic therapies although with ongoing improvements in tumor biology and genomics, including molecular pathways and alterations specific to EMPD, targeted or combinatorial therapies may be on the horizon.

SUMMARY

Clinicians caring for patients with EMPD should seek consultation from or if feasible, consider referral to high-volume, experienced centers with patients counseled and provided with frequent and close follow-up for disease recurrence or progression. Collaboration with groups such as the Global Society for Rare Genitourinary Tumors, and especially patient groups will be vital to designing trials and collaborative databases.

Efficacy and safety of HpD-PDT for Extramammary Paget's Disease refractory to conventional therapy: A prospective, open-label and single arm pilot study

BACKGROUND

Extramammary Paget's Disease (EMPD) is an intraepithelial cancer that is prone to recurrence and sometimes refractory to therapy. A few EMPD cases have been treated with Photodynamic therapy (PDT), which reported high complete remission (CR) rates and low recurrence with hematoporphyrin derivatives (HpD) The aim of this study was to further explore the efficacy and safety of HpD-PDT for EMPD patients.

METHODS

Open-label, single arm, pilot study was designed to investigate the role of HpD-PDT in EMPD. The HpD sensitizer was given intravenously at a dose of 3 or 5 mg/kg 48 h before light irradiation with a laser 630 nm red light at a dose level of 150-200 J/cm². Clinical parameters involving gender, age, disease course, previous treatment, tumor thickness, long diameter of lesion, TNM staging, EMPD staging, HpD dosage, Visual Analogue Scale (VAS) score, 1st month visit result, subsequent treatment, follow up period and endpoint outcomes were collected to evaluate efficacy and safety of the intervention.

RESULTS

Eleven patients with pathologic confirmed EMPD were treated with HpD-PDT. The thickness of skin lesions which were located in vulva, penis, scrotum, and perianal area is 0.8∼6.7 mm (mean thickness 2.9 mm). All patients were followed up for an average of 17.4 months (12∼27 months). Complete remission (CR) rate and partial remission (PR) rate at the 1st month were 90.1% (10/11) and 9.1% (1/11) respectively. At the end of follow-up, 72.7% of the subjects (8/11) showed CR. Pain, infection, photosensitivity and uroschesis are recorded as adverse events (AEs) in this population, and no event of hepatic impairment was reported. After treatment, all the eleven patients showed different degrees of scar in the treatment site, but none of them had any structural or functional abnormalities.

CONCLUSIONS

According to our study, HpD-PDT in EMPD is able to offer acceptable disease outcomes including relatively high CR rate, with good cosmetic and functional outcomes, and could be considered a potential recommended therapy for patients with EMPD.

TRIAL REGISTRATION

Chinese Clinical Trial Register (ChiCTR-1900024965).

Nonsurgical Treatments for Extramammary Paget Disease: A Systematic Review and Meta-Analysis

INTRODUCTION

Surgery is commonly regarded as the mainstay of treatment of extramammary Paget disease (EMPD); however, nonsurgical approaches have gained popularity in recent years.

OBJECTIVES

To review the published evidence for the efficacy and safety of nonsurgical modes of therapy for EMPD.

METHODS

A systematic review and meta-analysis of nonsurgical EMPD treatments was performed. The primary outcome was complete response (CR); secondary outcomes were clinical regression by ≥50%, adverse events, and recurrence rate.

RESULTS

The systematic review included 43 observational studies (341 patients; 7 prospective cohort studies, 19 retrospective cohort studies, and 17 cases series) evaluating 5 treatment modalities. Imiquimod (13 studies, 110 patients) administered at variable doses ranging from daily to twice weekly for 2-56 weeks demonstrated CR of 54% (95% CI, 40-67%; I2 = 37%) and had a satisfactory safety profile. In 14 heterogeneous studies (122 patients) evaluating photodynamic therapy (PDT), only 36% (95% CI, 22-53%; I2 = 52%) of patients achieved CR. Radiotherapy (12 studies, 67 patients) showed CR of 97%, but was associated with local and systemic side effects. Ablative lasers and topical fluorouracil and calcipotriene lacked adequate evidence of efficacy.

CONCLUSIONS

Imiquimod and radiotherapy are the most appropriate nonsurgical modalities for EMPD treatment given their good efficacy and safety profile. PDT has limited efficacy but may be appropriate in selected clinical settings.

A primer on extramammary Paget's disease for the urologist

Extramammary Paget's disease (EMPD) is a rare and lethal intraepithelial malignancy that remains poorly understood. No standardized guidelines or consensus statements exist with regards to the diagnostic evaluation, therapeutic approaches and follow-up management. Complete surgical excision with negative margins has been accepted as the mainstay of treatment for EMPD to decrease the risk of local recurrence and to maximize durable cure. Non-invasive therapies, such as laser therapy, photodynamic therapy, radiotherapy and topical chemotherapy have been utilized, but are best reserved for non-surgical candidates. While the debate on the surgical approach between wide local excision (WLE) and Mohs micrographic surgery (MMS) continues, several studies have demonstrated the ability of WLE to be performed safely and effectively and to yield equally satisfactory outcomes with similar rates of recurrence to MMS. Patients undergoing surgical excision often require complex closures with skin grafting or local flaps to close genital defects. We aim to provide an up-to-date review of the current knowledge of EMPD. In addition to discussing the clinical presentation and prognostic outcomes, we focus and elaborate on the diagnostic approaches and treatment alternatives available. This information may serve as a primer for the urologist who may be called upon to treat this malignancy primarily or to provide wound coverage secondarily.

Role of radiotherapy as curative treatment of extramammary Paget's disease

PURPOSE

Extramammary Paget's disease (EMPD) is a relatively rare malignancy that usually arises in the genital areas. Wide surgical excision remains the standard and most reliable curative treatment of EMPD. However, surgery is sometimes not possible, because many patients are elderly, and complete excision can be difficult owing to the tumor location. We, therefore, performed a review to determine the role of radiotherapy (RT) for EMPD.

METHODS AND MATERIALS

A total of 22 patients with EMPD in their external genitalia (4 men and 18 women, age 52-94 years at RT) underwent RT with curative intent. Nine patients had regional lymph node metastases. A total dose of 45-70.2 Gy (median, 60) was delivered to the pelvis, including the tumors, in 25-39 fractions (median, 33).

RESULTS

In all but 3 patients, the irradiated tumors were controlled during a follow-up period of 8-133 months (median, 42). Of the 22 patients, 13 developed recurrences, including local progression within the radiation field in 3 and lymph node and/or distant metastases outside the radiation field in 10, at 3-43 months after treatment. The 2- and 5-year local progression-free rates were 91% and 84%, respectively. Of the 22 patients, 7 patients had died at 33-73 months after RT. The cause of death was tumor progression in 4, infectious pneumonia in 2, and renal failure in 1 patient. The overall and cause-specific survival rates were 100% for both at 2 years and 53% and 73% at 5 years, respectively. No therapy-related Grade 3 or greater toxicity was observed.

CONCLUSIONS

RT is safe and effective for patients with EMPD. It appears to contribute to prolonged survival as a result of good tumor control.