Perianal malignant nodular hidradenoma in HIV infected pregnant patient

Malignant nodular hidradenoma (MNH) is a rare invasive tumour arising from eccrine sweat glands, with significant risk for local recurrence and distant metastases. Hidradenoma papilliferum is reported in pregnancy. To our knowledge this is the first MNH in a human immunodeficiency virus (HIV) infected pregnant woman. The patient presented with a painless perianal growth. Wide local excision was performed and the wound left to heal by secondary intension. The pathology report confirmed MNH. The patient has been followed for 14 months without evidence of recurrence. MNH should be considered in the differential diagnosis of similar lesions in HIV infected patients. Treatment for such HIV infected patients with MNH may be similar to that in immune-competent patients; they may benefit from a longer follow-up period.