Primary Clear Cell Renal Cell Carcinoma with Marked Intraluminal Mucin Secretion

Abstract

Clear cell renal cell carcinoma with mucin secretion is an unexpected situation. Primary renal adenocarcinoma and various metastatic carcinomasshould be considered in the differential diagnosis. Prognostic significance is not yet fully known due to the limited number of reported cases,and these lesions have been grouped under unclassified renal cell carcinoma. In our study, clear cell renal cell carcinoma with significant luminalmucin secretion is discussed with its histological, histochemical and immunohistochemical features.