Subcutaneous granuloma annulare in a patient with rheumatoid arthritis and diabetes mellitus.

A case is reported of multiple subcutaneous nodules over the forehead and scalp of a 67-year-old male with moderately severe seropositive rheumatoid arthritis and corticosteroid-induced diabetes mellitus. The histology was initially reported as consistent with a rheumatoid nodule, but on review, was regarded as typical of subcutaneous granuloma annulare (SCGA). The nodules resolved spontaneously within 4 months, which is also in keeping with SCGA. A brief review of the relevant literature is presented.