Fig. 2
From: Mucinous tubular and spindle cell renal cell carcinoma: a review of clinicopathologic aspects
Microscopic features of MTSRCC. a The tumor is composed of elongated tubules and spindle cells that are separated by abundant basophilic extracellular mucinous stroma. b When spindle cells dominate, this tumor may mimics a mesenchymal tumor. c Occasionally, mucinous collections may appear as numerous small vacuoles (arrow) imparting an appearance of clear cells. d Depicting a mucin-poor pattern of MTSRCC