Encysted Tubular Sweat Gland Adenoma of the Nasal Ala: A Rare Cause for Unilateral Nasal Discharge.

Benign cutaneous apocrine sweat gland adenomas in the nose are rare. We present the novel case of a nasal ala cutaneous sweat gland lesion. A 43-year-old male presents with a one year history of a right nostril mass with intermittent clear discharge, triggered by periods of hot weather and increased humidity. Histopathological analysis post-excision revealed a solid-cystic lesion of bi-layered ducts, with snouts suggestive of apocrine secretions. Given the close relationship of tumour enlargement with heat and expression of clear liquid upon direct pressure, we postulate that the intermittent tumescence represents sweat production and accumulation within the lesion. Laryngoscope, 135:602-604, 2025.