Mixed hepatoblastoma diagnosed by fine-needle aspiration biopsy cytology: a case report.

The cytologic features of a case of mixed hepatoblastoma diagnosed by fine-needle aspiration biopsy (FNAB) in a 2 1/2-yr-old child are described. FNAB was carried out on a large, firm mass in the upper abdomen, without any complications. The characteristic cytologic features were clusters of polyhedral cells with mild anisonucleosis, and intracytoplasmic bile pigment. Focal areas of mesenchymal elements were seen. Immature hematopoietic cells were present. FNAB offers a safe and accurate method of diagnosis.