Pseudoainhum associated with Psoriasis vulgaris

Pseudoainhum is the term applied to constricting bands around the digits or the limb which are either congenital or secondary to another disease. Progression of the constriction bands can lead to irreversible damage and autoamputation of the affected digit. Congenital pseudoainhum usually results due to amniotic bands or adhesions in utero while acquired pseudoainhum is usually secondary to trauma, neuropathy, systemic sclerosis or infections like leprosy. Psoriasis is a rare cause of acquired pseudoainhum with only five cases reported till date. We report a case of pseudoainhum secondary to psoriasis vulgaris in a 45 year old male which was successfully treated with topical corticosteroids and systemic methotrexate therapy