A 43-year-old woman prese...

A 43-year-old woman presented to the clinic with an 8-year history of yellow-brown spots on her shins. The lesions had been asymptomatic, and she had not sought care for them until they had grown in size. She had no history of diabetes mellitus, hypertension, or thyroid disease. On physical examination, atrophic yellow-brown plaques with telangiectasias and irregular violaceous borders were observed on both shins. A skin biopsy of the right shin was performed. Histopathological analysis showed several layers of necrobiosis within the dermis, perivascular inflammatory-cell infiltrates, collagen degeneration, and findings consistent with granulomatous dermatitis. Kindly suggest a possible diagnosis.