Prelims Vol. 69, No. 5

Renal oncocytoma in FNAC.In most cases tumoral cells are loosely cohesive with well-defined cellular limits, and abundant deeply stained granular cytoplasm (left).From Lanteri et al., pp.462-473.The oncocytic cells are arranged in cohesive groups.The lesional cells do demonstrate random atypia in the form of variable sizes and binucleation (right).From Gubbiotti et al.,