Spiradenoma, also spiroma[1][2] or eccrine spiradenoma,[3] is a cutaneous condition that is typically characterized, clinically, as a solitary, deep-seated dermal nodule of approximately one centimeter, occurring on the ventral surface of the body.[4]:666[5] Spiradenoma lesions are benign sudoriferous tumors,[6] and have also been described as cystic epitheliomas of the sweat glands.[7]