A Composite Renal Tumor with Dual Differentiation, Chromophobe and Collecting Duct Carcinoma

Figure 1

(a)–(d) CT axial and coronal scans depicting an exophytic mass in the lower pole of the left kidney: (a, b) initial presentation showing a well-circumscribed, enhancing mass with two small discrete, low attenuation areas in the inferior portion. (c, d) Enlargement of the renal tumor to almost twice the size from prior examination with compression of calyces, increased heterogeneity, and enhancement at the peripheral and anterior aspects of the mass.

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