Tubular apocrine adenoma (TAA) is a very rare sweat gland tumour. Comprehensive review of the literature reveals that TAA in the external auditory canal (EAC) has not yet been reported. We report a case of TAA in the EAC, together with characteristic histopathological findings.
"Although benign, its transition to basal cell carcinoma, metastatic adenocarcinoma, and ductal carcinoma may occur.3,4 SCAP often occurs in association with other benign adnexal lesions, such as nevus sebaceous,5 apocrine nevus,6 tubular apocrine adenoma,7,8 apocrine hidrocystoma, apocrine cystadenoma,9 and clear cell syringoma.10 "
[Show abstract][Hide abstract] ABSTRACT: Syringocystadenoma papilliferum (SCAP) is an uncommon benign adnexal tumor of the skin. It is frequently seen in association with other benign adnexal lesions, such as nevus sebaceous, apocrine nevus, tubular apocrine adenoma, apocrine hidrocystoma, apocrine cystadenoma, and clear cell syringoma. The unusual reported locations of SCAP include the head and neck, the buttock, the vulva, the scrotum, the pinna, the eyelid, the outer ear canal, the forehead, the back, the scalp, the thigh, the nipple, the axilla, and the postoperative scar. The occurrence of SCAP in the right lower abdomen is distinctly uncommon. Herein, we report an unusual case of a 41-year-old man with SCAP occurring in the right lower abdomen that did not develop malignancy, despite a long disease course and an absence of medical treatment. The clinical and histopathologic features and the differential diagnosis of SCAP are also discussed.
OncoTargets and Therapy 03/2013; 6:233-6. DOI:10.2147/OTT.S42732 · 2.31 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: Syryngocystadenoma papilliferum (SCAP) is an uncommon cutaneous adnexal neoplasm of apocrine gland origin. Until now, fewer than 200 cases have been reported in international literature, of which 12 cases involved the external ear. No cases of SCAP involving the middle ear have been reported. We describe a case of SCAP of external and middle ear, presenting with otomastoiditis and cerebral abscess; this aggressive behavior, never reported for a benign adenoma of the external or middle ear, could lead to a differential diagnosis with cholesteatoma or malignancies.
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