Topical Immunotherapy: What's New

Treatment of recurrent vulvar Paget disease with imiquimod cream: a case report and review of the literature

INTRODUCTION

Extra-mammary Paget disease is one of the rare neoplastic conditions of the skin. The most common site of involvement is the vulva and presents itself with erythematous plaques. Surgery is the most important treatment option. In the recent years, there are publications of the topical use of imiquimod cream in extra-mammary cutaneous Paget disease. We report the case of a woman with recurrent vulvar Paget disease, who underwent successful treatment with imiquimod cream. We also review the reports of other patients with vulvar Paget disease who were treated with topical imiquimod cream.

CASE REPORT

A 65-year-old woman presented to the Oncology Outpatient Clinic with an itchy lesion in her vulva for 2 years. In the gynecologic examination, a hyperkeratotic erythematous lesion was found starting from the right labium to involve clitoris, with a size of 4 × 3 cm. Pathology result was reported as Paget disease. She was operated and wide vulvar excision was performed with a safety margin of 2 cm. Then recurrence two times occurred. Because she refused surgery, imiquimod cream 5% was applied for treatment.

CONCLUSION

Imiquimod cream is an effective and safe therapeutic agent for both primary and recurring vulvar Paget disease.

Treatment of extramammary Paget disease with topical imiquimod cream: case report and literature review

Extramammary Paget disease is an uncommon cutaneous neoplasm that presents as erythematous plaques most frequently located in the anogenital region. Management of patients with extramammary Paget disease involves evaluation of the individual for: (1) a disease-associated, unsuspected, visceral malignancy and (2) secondary adenocarcinoma in the underlying dermis or regional lymph nodes. Several modalities, each with variable effectiveness, are available to treat the cutaneous component of the disease: electrodesiccation and curettage, laser surgery, aminolevulinic acid photodynamic therapy, radiotherapy, topical chemotherapy, and wide surgical excision. However, surgical excision using the Mohs micrographic technique is currently the modality of choice for treating the cutaneous lesions of extramammary Paget disease. Recently, a topical imidazoquinoline immunomodulator that induces cytokine production and stimulates the innate and cellular immune responses--imiquimod cream-has been used for the management of primary or relapsing extramammary Paget disease. Complete healing, without recurrence, of extramammary Paget disease in patients whose cutaneous lesions were treated topically with imiquimod 5% cream was observed. We describe a man with suprapubic extramammary Paget disease whose condition was primary and limited to his skin. Biopsy-confirmed complete resolution of his disease was observed after the topical application of imiquimod 5% cream 3 times per week (on alternate days) for 16 weeks. After reviewing the published reports of other patients with extramammary Paget disease whose disease was successfully treated with imiquimod cream, we suggest that topical imiquimod 5% cream-at least 3 times per week (with 1-2 d of nontreatment in between) for a minimum of 8 to 16 weeks--be considered as an initial treatment for primary cutaneous extramammary Paget disease. Surgical excision or an alternative therapeutic modality is recommended for patients whose extramammary Paget disease persists or recurs after treatment with topical imiquimod.