Docetaxel Induced Durable Response in Advanced Extramammary Paget's Disease: A Case Report

Abstract

The patient was a 54‐year‐old Japanese man with a seven‐month history of an eroded lesion on the scrotum. Skin biopsy confirmed the diagnosis of extramammary Paget's disease, and a CT scan revealed multiple metastases to the lymph nodes along the iliac artery and aorta. The patient underwent combination chemotherapy with mitomycin C, epirubicin, vincristine, cisplatin, and 5‐fluorouracil. After two courses of the regimen, the primary lesions on the scrotum regressed, however, the lymph node metastases did not respond. A regimen of continuous administration of low‐dose cisplatin and 5‐fluorouracil was not effective for the metastases either. Hence, administration of docetaxel at a dose of 60 mg/m²/every four weeks was started. After two courses, the lymph node metastases decreased by 75% compared to the pre‐treatment size, and the effect was judged a partial response. The major toxicities were neutropenia, alopecia, pitting edema, and facial erythema, but these were tolerable. Five courses of this regimen were followed by four courses of weekly administration of 25 mg/m² docetaxel. The partial response persisted for more than 12 months and the patient was able to enjoy daily life. Docetaxel may be an effective drug for patients with advanced extramammary Paget's disease.