All previous apocrine hidrocystomas reported have been less than 15 mm in diameter and localized to the head and neck or prepuce. This is a report of a giant apocrine hidrocystoma (70 × 50 mm) occurring on the trunk.
Holder WR, Smith J, Mocega EE. Giant Apocrine Hidrocystoma. Arch Dermatol. 1971;104(5):522-523. doi:10.1001/archderm.1971.04000230064010