SECTION EDITOR: EDWARD B. STELOW, MD
Diagnosis: Hidrocystoma of the external auditory canal
Tumors derived from sweat glands represent approximately 1% of all primary skin lesions,1 with 85% to 90% reported as benign.2 Hidrocystomas are rare, cystic, nonneoplastic, tumorlike papules or nodules of the sweat glands that are commonly found in the head and neck region.3 Based on their histologic features, hidrocystomas may be classified as either eccrine or apocrine.3,4
Pathology Quiz Case 2: Diagnosis. Arch Otolaryngol Head Neck Surg. 2012;138(8):780. doi:10.1001/archotol.138.8.780
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