fish-tank granuloma

swim·ming pool gran·u·lo·ma

a chronic, verrucous lesion most commonly seen on the knees; due to infection by Mycobacterium marinum.
Synonym(s): fish-tank granuloma

fish-tank granuloma

A popular term for clinical infection by Mycobacterium marinum, which is typically acquired by direct inoculation from fish tanks (80+% are aquarium-related), presenting 2–3 weeks after injury.