Case A 29-year-old male patient (smoker) with no significant clinical history, complained a painless mass in the right breast for 2 weeks before hospital admission. He denied any history of trauma. Clinical examination A retro-areolar painless lump (about 1 × 1 cm in diameter) was observed Complete blood count was within normal range Excisional biopsy through a periareolar skin was performed. Histopathology revealed a 1.3 × 1 × 0.4-cm mass, with clusters of inflammatory cells (including lymphocytes, neutrophils, epithelioid histiocytes and giant cells) surrounding a cyst-like lesion lined by squamous cells was found.
Histological observations were consistent with Granulomatous mastitis (GM) (as indicated in the figure). The tissue was cultured. No microorganisms were identified. No evidence of malignancy was found Diagnosis The diagnosis was made as idiopathic granulomatous mastitis…
