Medical Must-See: A ‘mammoth’ buttock lesion, four decades old
Nevus lipomatosus superficialis is a rare benign hamartoma of mature adipocytes found in the deeper layer of the skin.
This soft and lobulated buttock lesion grew to mammoth proportions over 40 years before the patient raised it with his doctors.
The US man, aged 67, said the lesion had developed after a small injury when he was a child, and was misdiagnosed as a genital wart during his 20s.
The doctors wrote in JAAD Case Reports that the lesion — measuring 23cm x 16cm — was soft and lobulated, without discharge, comedo-like lesions or hair.
A punch biopsy and shave biopsy from different parts of the mass showed adipocytes in the skin’s dermis, consistent with nevus lipomatosus superficialis (NLS): a rare benign hamartoma of mature adipocytes found in the deeper layer of the skin.
