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We report a 17 year-old woman who presented with a 1-year history of left axillary palpable mass. At physical examination the lesion was firm, lipomatous. The breast ultrasonography showed a left voluminous axillary mass, measuring 54mm, hyperechoic and ill limited. A surgical resection of the mass was performed. Grossly, it was a white firm well-circumscribed and lobed mass measuring 15x10x6 cm. Histological examination showed a benign mesenchymal tumor. It consisted of abundant fibrosis with hyalinised vessels, containing mononuclear infiltrate and foci of psammomatous calcifications (Fig. 1). Lymphoid follicles were noted around vessels and psammomas (Fig. 2). The tumor did not show any features of malignancy. Immunohistochemically, the spindle cells were vimentin positive (Fig. 3) and vessels showed CD34 positivity. These features confirmed the diagnosis of Calcifying fibrous tumors. At 4 years of follow-up, the patient was asymptomatic and there was no recurrence.

Calcifying fibrous tumor of axillary region