The authors present a series of 24 malignant neoplasms arising in preexisting benign spiradenoma (20), cylindroma (2), and spiradenocylindroma (2).

• 作者一次性展现了由良性的20例汗腺瘤、2例圆柱瘤和2例汗腺圆柱瘤进展而来的24例恶性肿瘤。