Eccrine Spiradenoma : Case Report With an Unusual Clininal Presentation

Abstract

Eccrine spiradenoma is one of the rare, benign dermal neoplasm showing eccrine sweat gland differentiation. The literature search accounts for less than 100 reported cases of eccrine spiradenoma. Clinically, the lesion presents as solitary, intradermal, circumscribed, round or oval, firm, painful or tender nodule measuring from 0.3 - 5 cm in diameter. Rarely if ES, presents as multiple lesions, in combination with other types of adnexal tumors such as cylindromas & trichoepitheliomas, it can be considered as a part of the Brooke-Spiegler syndrome. Majority of these tumours appear on the head/face & upper trunk region of the body. Spiradenomas arise in early adulthood in most instances with few reports also of congenital cases and no sex predilection seen. The definitive diagnosis is made by excisional biopsy of the tumour. Complete tumor excision with clear surgical margins is considered the primary treatment for these cases. Here, we present a rare case report of a 58 years old male presenting with a soft, cystic lesion in the left lumbar region of the abdomen for past 2 years duration. Surgical excision of the tumour was done with clear margins and the specimen was sent for histopathological examination. Due to the overlapping histomorphological features, this tumour is often confused with cylindromas and trichoepitheliomas along with other vascular tumours. Eccrine Spiradenoma, although a benign tumour, but malignant transformation has been described especially in long-standing cases or multiple lesions. So, early diagnosis is very important to prevent recurrence and to identify any onset of malignant transformation.