[Paraneoplastic dermatomyositis as a clue to occult gallbladder carcinoma]. / Dermatomiositis paraneoplásica como clave de un carcinoma de vesícula biliar oculto.

Adult-onset dermatomyositis (DM) is an idiopathic inflam- matory myopathy frequently associated with underlying cancer, including gastrointestinal tumors. However, its as- sociation with carcinomas of the hepatobiliary tract is exceptional. We present a case of paraneoplastic DM occurring as the first and only clinical manifestation of an underlying carcinoma of gallbladder.