Patch-Type Granuloma Annulare with Clinical and Histological Features of Morphea: A True Overlap?

A 67-year-old woman was evaluated for a worsening asymptomatic rash located on her torso, back, and legs. She denied any chills or fevers, reported feeling otherwise well. Clinically, large brownish, slightly atrophic plaques were seen the torso suggestive of either morphea granulomatous condition. Histopathologic examination revealed an increase in interstitial histiocytes infiltrating between altered collagen fibers, palisaded granulomas with increased mucin, granuloma annulare (GA), as well dermal sclerosis, perineural infiltrates plasma cells diminished CD34 counts, that are more typical localized scleroderma/morphea. Morphea patch-type GA may be indistinguishable clinically share some histopathological features. This case demonstrates similarities these conditions features both same patient.