MUC5AC and adenocarcinoma: The histological patterns of the mesonephric adenocarcinomas are multiple, as they usually exhibit a mixture of morphologic characteristics.5In contrast to mesonephric hyperplasia, the typical background lesion of a mesonephric carcinoma does not have a lobular architecture, the nuclei appear cytological malignant,11and the tubular glands are lined by mucin-free cuboidal epithelium containing luminal eosinophilic hyaline secretions, with solid, papillary, ductal, or retiform architectural arrangements with different grades of atipia.4, 5, 13