The liver is a commonly targeted deep-seated organ in which fine-needle asp
iration biopsy (FNAB) is performed. By far, the most frequently encountered
lesions on FNAB of the liver are metastases; however, a wide variety of ot
her lesions have been described and are likely to be encountered. Because o
f this wide variety, attention to architectural as well as cytologic featur
es on smears and cell block preparations, ancillary techniques, and special
studies are often required. In the setting of proper specimen handling and
judicious use of ancillary procedures, FNAB of hepatic lesions can be an a
ccurate diagnostic procedure.