Kuma Y, et al. - Total thirty-nine cases histologically diagnosed as hidradenoma are reviewed to examine the connection between the fusion gene and clinicohistopathological features. Researchers conclude that CRTC1/3-MAML2 fusion gene investigation can be a valuable method for diagnosing hidradenoma. Considering the histological and genetic similarity to mucoepidermoid carcinoma, hidradenoma may be a cutaneous counterpart of salivary gland mucoepidermoid carcinoma.