Surgical Treatment for Extramammary Paget’s Disease

Functional preservation benefits of minimal surgery for extramammary Paget's disease

As extramammary Paget's disease (EMPD) sometimes invades and metastasizes from the skin to the mucosa, radical surgical resection of these lesions is often difficult. The purpose of this study was to analyse the association between surgical margins and survival as well as the benefit of functional preservation over complete resection, in patients with EMPD. We retrospectively analysed 230 patients diagnosed with EMPD between 1969 and 2020. Patient and treatment characteristics were recorded. Since our centre is a specialized hospital and almost all patients were referred from other hospitals, we reviewed their referral letters. Prognostic factors and survival time were also analysed. Among 230 patients, 78 (33.9%) had positive margins. The presence of margin positive lesions increased the local recurrence rate but was not significantly correlated with survival. Of all the patients who had received a thorough explanation about the surgical procedure in the referring hospital, 43.8% were scheduled for surgeries that would result in functional impairment, and all of them had function-preserving surgeries at our hospital with a 10-year survival rate of 100%. Our result suggest that less invasive surgery preserves anogenital and urethral function may be an acceptable option for EMPD treatment.

Paget disease of de Vulva: About a rare case and a literature review

INTRODUCTION

Paget disease of de Vulva (PDV) is a rare neoplastic intraepithelial pathology. In the majority of cases, neoplastic proliferation remains intraepithelial and the prognosis is favorable. The standard treatment for Paget disease is surgical excision. We report the observation of a patient with extensive and recurrent vulvar Paget's disease which we treated with surgery.

PRESENTATION OF CASE

A 39-year-old single woman presented with itchy heterogeneous erythematous vulvar lesions suggestive of Paget disease. A biopsy confirmed the diagnosis of non-invasive Paget disease. Surgical excision of the lesions was realized, with the anatomopathological examination confirming the diagnosis.

DISCUSSION

MPV is often diagnosed late due to the absence of specific symptoms in its initial phase. Clinically, it manifests as an erythematous lesion or eczema. Immunohistochemistry plays a crucial role in the diagnosis of VPM, helping to distinguish the disease from other vulvar conditions. Vulvar MPV has recently been subdivided into two subtypes: type 1, which concerns primary vulvar lesions, and type 2, which concerns associated primary non-cutaneous adenocarcinomatous proliferations or pagetoid intraepithelial urothelial carcinomas. Surgery is considered the gold standard treatment for MPV.

CONCLUSION

PDV is a complex disease requiring appropriate diagnosis and management, with surgery as the main treatment, but other less invasive therapeutic options may be considered on a case-by-case basis. Prognostic factors play an important role in the choice of treatment and disease progression.

Impact of combining photodynamic diagnosis with reflectance confocal microscopy, on tumor margin detection and surgical outcomes in patients with extramammary Paget disease

Background The recurrence rate of extramammary Paget disease after surgical resection is high due to the lesions' poorly delineated and unclear margins. Aims To evaluate the impact of non-invasive tumour margin detection via photodynamic diagnosis plus reflectance confocal microscopy on the surgical outcomes of patients with extramammary Paget disease. Methods Thirty-six patients with histopathologically confirmed primary extramammary Paget disease between January 2017 and June 2018 were included in this study. The skin lesion margins were preoperatively observed using the naked eye, photodynamic diagnosis, and reflectance confocal microscopy. An incision was made 0.5-2 cm from the outermost non-invasive detection marker line. The incision depth was more significant than the follicle level or the deepest level affected by the tumour in the biopsy specimens. After the skin lesions were removed, a pathological examination of the specimens was conducted to ensure clear margins to prevent tumour recurrence and metastases. Results A total of 166 good-quality tissue sections were selected from 36 patients. The tumour surfaces and deep margins were within the scope of resection. Six patients (6/36, 15.4%) experienced local recurrence 2-12 months postoperatively. One patient (1/36, 2.8%) had lymph node metastasis without local recurrence 36 months postoperatively and died 50 months postoperatively (1/36, 2.8%). Limitations This study is limited by the small patient population, especially the number of patients with mucous membrane involvement. Conclusion Using photodynamic diagnosis plus reflectance confocal microscopy to detect the margins of extramammary Paget disease lesions non-invasively reduces the postoperative tumour recurrence rate and is a valuable guide for tumour treatment.

[Micrographic controlled surgery in everyday dermatosurgery]

Micrographic controlled surgery (MCS) has become established in dermatosurgery in recent years and includes various methods to enable the histologically proven complete resection of malignant cutaneous tumors, while at the same time sparing tumor-free tissue in the immediate vicinity as much as possible. MCS is of great importance in the surgical treatment of cutaneous malignancies in so-called problem locations and aggressive tumor subtypes. Indications for MCS include basal cell carcinoma, cutaneous squamous cell carcinoma, Bowen's disease and Bowen's carcinoma, melanoma in chronic light-damaged skin with acral lentiginous melanoma, dermatofibrosarcoma protuberans (DFSP), and Merkel cell carcinoma. However, other tumor entities are also treated using MCS, such as extramammary Paget's disease and various cutaneous sarcomas. All procedures subsumed under MCS have in common the marking of the surgical specimen for topographical orientation, which provides assignment of remaining tumor remnants. Various methods of MCS (3D histology, the horizontal method or Mohs surgery) are presented in this article. Furthermore, this article aims to raise awareness of the possibilities and limitations of micrographically controlled surgery.

Extramammary Paget's Disease of the Vulva and Concomitant Premalignant/Malignant Vulvar Lesions: A Potential Challenge in Diagnosis and Treatment

The aim of the present study was to evaluate the incidence of concomitant vulvar cancers or premalignant lesions in women surgically treated for extramammary Paget's disease of the vulva (EMPDV) through a multicenter case series. The medical records of all women diagnosed with and treated for EMPDV from January 2010 to December 2020 were retrospectively analyzed. Women with EMPDV and synchronous vulvar cancer, vulvar intraepithelial neoplasia (VIN) and/or lichen sclerosus (LS) at the histology report were included in the study. A total of 69 women eligible for the present study were considered. Concomitant vulvar lesions occurred in 22 cases (31.9%). A total of 11 cases of synchronous VIN (50%) and 14 cases (63.6%) of concomitant LS were observed. One patient (4.5%) had synchronous vulvar SCC (FIGO stage 1B). Women with EMPDV and concomitant premalignant/malignant vulvar lesions had a significantly higher rate of invasive EMPDV and wider lesions with an extravulvar involvement. The specific meaning of the association between EMPDV, VIN, SCC and LS remains unclear. The potential overlapping features between different vulvar lesions highlight the importance of dedicated gynecologists and pathologists in referral centers.

Coexistence of condyloma acuminatum and extramammary Paget's disease on penis and scrotum: A rare case report

RATIONALE

Extramammary Paget's disease (EMPD) is a rare skin cancer that commonly occurs in sites rich in apocrine glands, such as perineum, vulva, axilla, scrotum, and penis. On the other hand, condyloma acuminatum (CA; also referred to as anogenital warts) is a common benign neoplasm caused by human papillomavirus. Few cases of coexistent EMPD and CA have been reported because of the rarity of the condition.

PATIENT CONCERNS AND DIAGNOSIS

A 72-year-old man with a genital mass, which appeared to be composed of multiple papillomatous masses, was referred for surgical resection. The lesion was first noticed 6 months previously and grew rapidly. CO2 ablative laser therapy was performed twice at a primary clinic, but the mass recurred.

INTERVENTION AND OUTCOMES

Excisional biopsy revealed the presence of coexistent EMPD and CA. Additional wide excision was performed, and postoperative biopsy confirmed no residual tumor. Two years after surgery, no recurrence had occurred.

LESSONS

CA can co-occur with several types of skin malignancies, and a skin malignancy coexisting with CA is difficult to diagnose visually. Therefore, even if a skin lesion in the genital region is considered to be CA, we recommend punch biopsy before treatment because it can benefit prognosiss.

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.

Stage 3 perianal extra mammary Paget's disease: A case report of a non-operative approach

Introduction and importance

Extra mammary Paget's disease (EMPD) is a rare disease characterised by intraepithelial involvement of the skin by non-squamous carcinoma cells in the vulva, perineum, and scrotum. Secondary EMPD is even rarer and accounts for roughly 25% of cases (Delport, 2012) [1]. Surgery (Mohs/wide local excision) is the standard treatment for primary non-invasive disease, but management of secondary invasive EMPD is less defined as there are no current treatment guidelines.

Case presentation

A 76-year-old lady had a 1-year history of a pruritic perianal rash that was refractory to multiple topical agents. A biopsy confirmed a diagnosis of EMPD in June 2020 and on staging imaging was found to have metastatic disease in her right inguinal lymph node. Upon discussion at a multi-disciplinary team (MDT) meeting, she proceeded chemo radiation therapy followed by systemic chemotherapy as she had such extensive perianal disease that would make surgery quite morbid. She had interval imaging 3 monthly to assess response to treatment. In June 2021, the patient had a complete clinical response and has ongoing 6 monthly surveillance.

Clinical discussion

EMPD is extremely rare and currently treatment options for secondary EMPD are still being navigated. Specifically, there are no current randomised control trials (RCTs) that compare outcomes in secondary EMPD between radiation therapy and surgery and in the context of stage III disease. This case report documents the treatment approach governed by MDT consensus and has a 1 year follow up. The case report has been reported in line with the SCARE 2020 criteria (Agha et al., 2020) [2].

Conclusion

The patient has had a good outcome with treatment, however ongoing surveillance is required.

•

EMPD is a rare disease.

•

There are no treatment guidelines for invasive disease.

•

Invasive disease confers high recurrence rates and lower survival rates.

•

There are no RCTs comparing surgery versus radiation therapy in invasive disease.

•

Combined radiation and chemotherapy can be a reasonable definitive treatment in stage 3 disease.

The treatment of anogenital extramammary Paget's disease as part of a multidisciplinary approach: The use of Mohs surgery moat method with CK7

Although most cases of extramammary Paget's disease (EMPD) are localized to the intraepidermal, the extensive subclinical extension can lead to high rates of marginal recurrence with wide local excisions and topically destructive treatments. Recurrence rates of EMPD treated with Mohs micrographic surgery (MMS) without immunohistochemical staining are better but variable. Here, we describe our multidisciplinary approach for treating large EMPD tumors of the anogenital region involving critical anatomy using MMS for peripheral margin clearance (moat method) and intraoperative CK7 immunostaining. Our clinical pearls for the management of anogenital EMPD are based on 53 multidisciplinary cases treated at the author's institution between 2014 and 2020.

Laparoscopic abdominosacral resection for rectal and anal canal carcinoma with pagetoid spread

INTRODUCTION

Perianal Paget's disease is associated with adenocarcinoma and can spread to the perianal skin. It often requires extensive resection of the perianal skin and rectum. Many studies have shown the efficacy of laparoscopic abdominoperineal resection for lower rectal cancer. However, extensive resection of the dorsal side of the perineal skin is difficult in the lithotomy position. We report a laparoscopic abdominosacral approach using the jackknife position for perianal Paget's disease.

MATERIALS AND SURGICAL TECHNIQUE

Surgery was started using the lithotomy position, and total mesorectal excision with central lymphadenectomy was performed laparoscopically. Pelvic floor muscles were divided 2 cm away from the rectum. The sigmoid colon was then divided with a linear stapler, and a terminal colostomy was made. The sacral approach was then followed with the patient placed in a jackknife position. A skin incision was made 1-2 cm from the negative margin confirmed by preoperative mapping biopsy and resected en-bloc. We used this approach in two patients with a mean operative time of 483 minutes, including 53.5 minutes for the position change. All tumor margins, including the skin, were cancer-free, and primary wound closure was possible in both of the cases. Both patients were doing well without any recurrence 10 and 13 months postoperatively.

CONCLUSION

Laparoscopic abdominosacral resection is safe and effective and facilitates extensive perineal skin resection, especially on the dorsal side, with a less invasive laparoscopic procedure.

[Management of malignant adnexal neoplasms of the skin]

Malignant adnexal neoplasms of the skin are a heterogeneous group of rare malignancies with eccrine, apocrine, sebaceous and follicular differentiation. Essential clinical practice recommendations for the overall management of these cancers are presented. Moreover, specific evidence-based findings according to diagnosis, therapy and follow-up of porocarcinoma, sebaceous carcinoma and microcystic adnexcarcinoma will be explained.

Extramammary Paget disease of the vulva

Extramammary Paget disease (EMPD) is a rare neoplasm with uncertain histogenesis, usually presenting in the anogenital area, most commonly in the vulva. The disease is characterized by slow grow and high recurrence rates. This article reviews the epidemiological, clinical, morphological, genetic and treatment features of EMPD of the vulva reported in recent years.

Recurrence of Noninvasive Perianal Extramammary Paget's Disease in the Lymph Nodes without Local Recurrence after Complete Excision

Primary extramammary Paget's disease (EMPD) is a rare intraepithelial adenocarcinoma. Lymph node metastasis from noninvasive EMPD originating in the anorectal region is extremely rare, and the recurrence of noninvasive EMPD is commonly associated with local recurrence mainly due to an insufficient resection margin. We herein report a case of inguinal and para-aortic lymph node recurrence without local recurrence after complete margin-free surgical resection of noninvasive perianal EMPD. The patient was a man in his 40s who presented with an erythematous plaque of 7 × 5 cm in the perianal region, which had been present for 1 year. Biopsy from the perianal skin suggested EMPD; it was positive for cytokeratin (CK)7 and negative for CK20. Underlying malignancy was ruled out based on whole-body enhanced computed tomography (CT) and total colonoscopy. Surgery including complete wide resection of the lesion with preservation of the rectum was performed, and VY-advancement flap reconstruction and flap-rectum anastomosis were performed. A histological examination of the whole specimen with 5-mm slices confirmed noninvasive EMPD resected with all-negative surgical margins. At 2 years and 6 months after surgery, however, enlargement of the inguinal and para-aortic lymph nodes was detected by follow-up enhanced CT, and the recurrence of EMPD was diagnosed based on left inguinal lymph node biopsy. The patient underwent chemotherapy without a remarkable response. He died of the disease 53 months after the first surgery. This is the first case report of lymph node metastasis without local recurrence after complete margin-free resection of noninvasive perianal EMPD.

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.

Concurrence of Primary Cutaneous Extra Mammary Paget's Disease and Squamous Cell Carcinoma in situ of Vulva: A Case Report

Extramammary Paget's disease and vulvar intraepithelial neoplasia are common lesions of vulve, but synchronous occurrence is rare in a same location. Herein we describe a concurrence of primary cutaneous extra mammary Paget's disease and squamous cell carcinoma in situ of vulva in an Iranian women. A 59 year old woman, initially presented to Kosar teaching hospital gynecology clinic April 2017 with a single, well defined, scaly, white ulcerated mass, 2 cm in diameter on right minor labia, but other examinations were normal. She had no urinary or gastrointestinal symptoms. Incisional biopsies from the mass represented concurrence extramammary Paget's disease and VIN3. She underwent radical vulvectomy .No evidence of disease recurrence was noted after 16 months follow up. Participant consent was obtained before patient was enrolled in this study. There are lot of diseases that involve genitalia and lead to vulvar lesions. But in this rare case, we diagnosed concurrence of extramammary Paget's disease and vulvar intraepithelial neoplasia in a same location. Additionally, the clinical presentation as a vulvar mass was found unusual. Therefore, we report the case to sensitize gynecologists and pathologists for uncommon pathologies and their manifestations in vulva.

High Risk of Proximal and Local Neoplasms in 2206 Patients With Anogenital Extramammary Paget's Disease

BACKGROUND

Extramammary Paget's disease is an uncommon intraepidermal adenocarcinoma with poorly defined clinical implications.

OBJECTIVE

The purpose of this research was to estimate the risk of second primary neoplasms in patients with extramammary Paget's disease.

DESIGN

This was a retrospective analysis of the Surveillance, Epidemiology, and End Results Registry (1973-2014).

SETTINGS

The study included population-based cancer registries from the United States.

PATIENTS

Patients who were diagnosed with anogenital Paget's disease were included.

MAIN OUTCOME MEASURES

Risk of second primary development was measured.

RESULTS

We identified 108 patients with anal Paget's disease, 421 patients with male genital (scrotum or penis) Paget's, and 1677 patients with female genital (vagina or vulva) Paget's. Median follow-up time was 5.9 years. The risk of developing colorectal adenocarcinoma was 18.5% for patients with anal Paget's disease. Eighty percent of colorectal adenocarcinoma diagnoses were synchronous (within 2 mo) to anal Paget's diagnoses, whereas metachronous tumors occurred at a median time of 2.4 years. Of patients with anal Paget's disease, 8.3% developed an anal adenocarcinoma or nonsmall cell cancer. In male patients with genital Paget's, the risk of proximal genitourinary malignancy was 9.7%, scrotal or testicular adenocarcinoma was 0.4%, and penile or scrotal squamous carcinoma was 1.7%. In female patients with genital Paget's, the risk of proximal genitourinary malignancy was 3.0%, vaginal or vulvar adenocarcinoma was 1.4%, and vaginal or vulvar squamous neoplasm was 1.0%. Five-year overall survival was 59.7%, 73.5%, and 80.7% in patients with anal, male genital, and female genital Paget's (p < 0.001).

LIMITATIONS

The registry did not record surveillance schedule, provider specialty, or nonprocedural therapies for extramammary Paget's disease.

CONCLUSIONS

In the largest published cohort of patients with extramammary Paget's disease, patients with anal Paget's had a much higher risk of both proximal and local neoplasms as compared with patients with genital Paget's. Patients with anal Paget's also experienced worse survival as compared with those with purely genital Paget's. See Video Abstract at http://links.lww.com/DCR/B20. ALTO RIESGO DE NEOPLASIAS PROXIMALES Y LOCALES EN 2206 PACIENTES CON ENFERMEDAD DE PAGET EXTRAMAMARIA ANOGENITAL:: La enfermedad de Paget extramamaria es un adenocarcinoma intraepidérmico poco frecuente con implicaciones clínicas poco definidas.Estimar el riesgo de segundas neoplasias primarias en pacientes con enfermedad de Paget extramamaria.Análisis retrospectivo del Registro de Vigilancia, Epidemiología y Resultados Finales (1973-2014).Registros de base poblacional en cáncer de los Estados Unidos.Pacientes que fueron diagnosticados con enfermedad de Paget anogenital.Riesgo de desarrollo un cáncer primario adicional.Se identificaron 108 pacientes con Paget anal, 421 pacientes con Paget genital masculino (escroto o pene) y 1677 pacientes con Paget genital femenino (vagina o vulva). Tiempo mediano de seguimiento fue de 5,9 años. El riesgo de desarrollar adenocarcinoma colorrectal fue del 18,5% para los pacientes con Paget anal. El ochenta por ciento de los diagnósticos de adenocarcinoma colorrectal fueron sincrónicos (dentro de los 2 meses) a los diagnósticos de Paget anal, mientras que los tumores metacrónicos ocurrieron en un tiempo promedio de 2,4 años. De los pacientes con Paget anal, el 8.3% desarrolló un adenocarcinoma anal o cáncer de células no pequeñas. En los pacientes masculinos con Paget genital, el riesgo de malignidad genitourinaria proximal fue del 9,7%, el adenocarcinoma escrotal o testicular fue del 0,4% y el carcinoma escamoso del pene o escroto fue del 1,7%. En pacientes femeninas con Paget genital, el riesgo de malignidad genitourinaria proximal fue de 3.0%, el adenocarcinoma vaginal o vulvar fue de 1.4% y la neoplasia escamosa vaginal o vulvar fue de 1.0%. La supervivencia general a cinco años fue del 59.7%, 73.5% y 80.7% en pacientes con anal, genital masculino y genital femenino, respectivamente (p <0.001).El registro no señalo el cronograma de vigilancia, la especialidad del proveedor o las terapias sin procedimiento para la enfermedad de Paget extramamaria.En la cohorte más grande publicada de pacientes con enfermedad de Paget extramamaria, los pacientes con Paget anal demostraron un riesgo mucho mayor de neoplasias proximales y locales en comparación con los pacientes con Paget genital. Los pacientes con Paget anal además demostraron una peor supervivencia en comparación con aquellos con Paget aislada genital. Vea el Resumen del Video en http://links.lww.com/DCR/B20.

Paget disease of the vulva an analysis of 24 cases

Paget's disease can arise in the breast (mammary Paget disease) or in other locations (extramammary Paget disease) such as anogenital skin in both males and females (Paget disease of the vulva [PDV]). Underlying adenocarcinoma can be found in some cases. This study aims to report clinical aspects, surgical procedures, outcomes, and recurrences of patients with PDV.A retrospective chart review was conducted on patients with pathologically confirmed diagnosis of PDV managed at the Department of Obstetrics and Gynecology, University of Bari, and the "Giovanni Paolo II" National Cancer Institute in Bari, between 1998 and 2018.Records of 24 cases of PDV were examined. Median age of the patients at diagnosis was 69.3 (range 38-84), diagnosis of synchronous cancer was made in 2 cases and in 2 other cases of metachronous disease. Three patients had previously been diagnosed with other oncological diseases. All patients underwent surgery including wide local excision (6), simple vulvectomy (8), and extended vulvectomy (10). Lymphadenectomy was performed in 2 cases and reconstructions with advancement flaps in 7 cases. Four patients were found to have invasive disease and 1 had inguinal node involvement. Positive margins were found in 11 patients. Wound dehiscence and urethral stenosis were found in 4 and 1 case each. Eight recurrences (33.33%) were observed, regardless of positive surgical margins.PDV has a low rate of malignancy but a high rate of recurrence. It should be diagnosed early to avoid repeated surgery and to reduce symptoms and morbidity.

Ultrasound Biomicroscopy and High-Frequency Ultrasound for Evaluating Extramammary Paget Disease With Pathologic Correlation

OBJECTIVES

The purpose of this study was to investigate the performance of ultrasound biomicroscopy (UBM) and high-frequency ultrasound (HFUS) in the assessment of extramammary Paget disease (EMPD) and to correlate the imaging features with pathologic findings.

METHODS

In this retrospective study, we described the imaging features from UBM and HFUS based on 17 pathologically proven EMPD cases. The performance for visualizing layer involvement by UBM and HFUS was compared. Additionally, we checked the consistency between layer involvement of the lesions on UBM images and the pathologic results. Additionally, blood flow and the status of lymph nodes were investigated with HFUS.

RESULTS

Ultrasound biomicroscopy revealed that all 17 lesions (100%) were hypoechoic and grew in a creeping form. The feature of layer involvement was shown in 10 lesions (58.8%) limited to the epidermis and 6 lesions (35.3%) involving the dermis, and the remaining lesion (5.9%) involved the full skin layers. Layer involvement was clearly displayed by UBM for all lesions (100%) but for only 5 lesions (29.4%) by HFUS (P < .001). Additionally, the layer involvement of 15 lesions (88.2%) on UBM was consistent with the pathologic results (κ = 0.746). High-frequency ultrasound revealed profuse blood flow in most lesions (64.7% [11 of 17]), and 1 case showed inguinal lymph node metastasis.

CONCLUSIONS

Combined use of UBM and HFUS can provide key information on EMPD based on ultrasound features. Comparatively, UBM provides clearer morphologic information, whereas HFUS provides information on lymph node metastasis and blood flow.

Surgical Experience With Genital and Perineal Extramammary Paget's Disease

OBJECTIVE

To describe our surgical experience for the treatment and management of extramammary Paget's disease (EMPD).

METHODS

Our surgical approach involves excising a 2-cm margin of normal appearing skin around the EMPD-suspicious lesion. Prior to excision, the tissue is oriented and demarcated into predefined segments in coordination with a pathologist. Frozen sections are performed when necessary to guide additional excision. Xenograft or wet-to-dry dressings are applied depending on size and location of the wound while the specimen is expeditiously reviewed over the following 24-48 hours. If positive margins remain, further excision of the corresponding skin segment is performed. Delayed complex wound closure +/- split thickness skin grafting is performed once negative margins are confirmed.

RESULTS

Ten EMPD patients were referred to two academic centers between 2014 and 2018. Two patients had positive lymph nodes at diagnosis and underwent palliative surgery and died within 12 and 29 months. The remaining 8 patients underwent a median of 1 surgery (range 0-3) with referring providers before undergoing a median of 3 surgeries (range 2-5) at our institutions to achieve negative surgical margins and wound reconstruction (7 split thickness skin grafts, 1 secondary closure). At mean follow-up of 15 months, 1 patient recurred, required further excision, and remains disease free.

CONCLUSION

EMPD is a rare malignancy with poorly described treatment methodologies. Due to its multifocal distribution and asymmetric spread, obtaining negative margins can be challenging. Our systematic approach to obtaining wide margins and documenting excised skin has enabled us to achieve negative margins for this challenging malignancy.