Cystosarcoma phyllodes (CSP) tumors of the breast are rare, comprising less than 1 per cent of all mammary neoplasms. CSP tumors have typically been regarded as predominantly benign, unilateral lesions of the female breast. However, sporadic cases of CSP have been reported in males. We present the first case of CSP in a man occurring in bilateral axillae and review the literature on CSP in males.
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