XXXX in a 15-month-old male: cytomorphology, electron microscopy, and differential diagnosis.

@entity1 @entity5 @entity160 @entity521 @entity4177
The authors describe a case of @entity4177 in a 15-month-old male and discuss the differential diagnosis and electron microscopic features of small round cell @entity5 . The @entity1 was found to have an enlarged liver and was admitted to the hospital for further investigation. Fine-needle aspiration of the liver revealed small. uniform cells with increased nuclear/cytoplasmic ratio and focal rosette formation. A diagnosis of small blue cell @entity5 favoring @entity4177 was made, but @entity521 could not be ruled out. Electron microscopic analysis performed on the liver aspirate showed features of hepatic differentiation as well as absence of neuroblastic differentiation. The diagnosis of @entity4177 was made. Serum @entity160 level of 33,250 mg/L confirmed the diagnosis. Liver biopsy performed subsequently showed @entity5 cells arranged in nests, acini, and trabeculae with mitotic figures. Electron microscopy showed the same findings as described above. The @entity1 underwent chemotherapy for 4 months and subsequently a partial liver resection was performed. This case illustrates the important role of electron microscopy in evaluating small round cell @entity5 in @entity1 .
