Ultrasonographic features of eccrine spiradenoma: A case report

RATIONALE: Eccrine spiradenoma (ES) is a rare benign skin adnexal tumor originating from eccrine sweat glands. The features of ES on ultrasonography (US) have received little attention. Therefore, we report the sonographic findings in a case of an ES that originated from the abdominal wall and discuss the previously reported cases. PATIENT CONCERNS: A 53-year-old woman was admitted to our hospital with a complaint of a painful nodule on the right side of her abdominal wall of 1-year duration. DIAGNOSES: The mass on the right side of abdominal wall was diagnosed as ES by histopathological examination. INTERVENTIONS: The patient subsequently underwent total excision of the mass. OUTCOMES: The patient recovered well and had no complications during the 1-year follow-up. LESSONS: As eccrine spiradenoma (ES) is rare and most of the tumors are excised without prior imaging studies. Little is known regarding the features of ES on ultrasonography (US). Familiarizing with the clinical and US features of this rare tumor may increase awareness of the disease among sonographers and clinicians.