FINE-NEEDLE ASPIRATION BIOPSY IN HEPATIC ECHINOCOCCUS-MULTILOCULARIS

OBJECTIVE: To determine the fine needle aspiration biopsy (FNAB) findi ngs in hepatic Echinococcus multilocularis. STUDY DESIGN: FNAB and tru -cut liver needle biopsy were applied in 14 hepatic E multilocularis c ases. Cytologic smears were stained with May-Grunwald-Giemsa and perio dic odic acid-Schiff (PAS) stain. Tissue sections were stained with he matxylin-eosin (HE) and PAS stain. RESULTS: In tissue sections, homoge neous, thin, cystic structures of various dimensions strongly stained with PAS. Mucoid material was stained with PAS in the cystic structure s. Wide, coagulative necrosis teas observed in all cases. In some case s there were foreign body-type giant cells at the periphery of the les ion. In all the cytologic smears there were an intense necrotic ground , PAS-positive hyaline cuticular structures and mucoid globules; in so me cases there were foreign body-type giant cells. CONCLUSION: The abo ve cytologic characteristics a-re basic diagnostic criteria for FNAB o f E multilocularis.