The number of transmen seeking gender-confirming surgery has risen in the past decade. In a paper published in the British Journal of Surgery analysing breast tissue from 344 transmen undergoing mastectomy, breast lesions—either benign or malignant—were present in 166 individuals (48.3%).
Invasive breast cancer was found in two samples. The value of routine examination of mastectomy specimens was illustrated by the discovery of an unexpected breast cancer in a 31-year-old transman.
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