01 March 2022>: Articles
Challenging differential diagnosis, Rare diseaseAhmed I. Younes D* , Monica Jackson D , Valeria L. Dal Zotto E
Am J Case Rep 2022; 23:e935407
Figure 2. (A) H&E-stained section shows the relationship between the 2 masses. The oncocytoma is present in the upper field separated from AML, which is present in the lower field, showing as a thin area of renal parenchyma (40×). (B) H&E-stained section of the larger tumor shows tumor cells with dense eosinophilic cytoplasm and round regular nuclei (400×). (C) H&E-stained section of the smaller tumor shows admixture of mature adipose tissue formation and aggregate of epithelioid tumor cells (400×). The oncocytoma is positive for PAX-8 (D) and CD117 (E), while the AML is positive for melan-A (F) (40×).