Clear cell adenocarcinoma

(A) Solid variant with irregular nuclei and clear, koilocyte-like appearance.
(B) Clear cell carcinoma with a tubulocystic appearance with flattened neoplastic cells.
(C) Clear cell carcinoma with "hobnail" cells.
(D) Clear cell carcinoma with papillary architecture. Papillae are generally short and rounded and often have an eosinophilic, hyalinized stroma.