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Algorithm for Immediate Cytologic Diagnosis of Hepatic Tumors

¹ Service de Radiologie, Hôpital Beaujon, Assistance Publique des Hôpitaux de Paris, Université Paris, 100, Blvd. du Général Leclerc, 92110 Clichy, France.
² Service de Pathologie, Hôpital Beaujon, Assistance Publique des Hôpitaux de Paris, Université Paris, Clichy, France.

OBJECTIVE. Immediate cytologic assessment of hepatic lesions can help determine the adequacy of specimens and may yield a preliminary diagnosis. The purpose of this study was to analyze the diagnostic accuracy of on-site cytologic assessment compared with definitive cytologic examination in the detection and correct subtyping of malignant hepatic lesions.

SUBJECTS AND METHODS. The study population included 472 consecutively registered patients with hepatic nodules who underwent sonographically guided fine-needle aspiration and core biopsies. During on-site cytologic analysis, the pathologist made a preliminary diagnosis of malignancy or negative for malignancy for each nodule. When a malignant lesion was diagnosed, immediate subtyping was attempted.

RESULTS. With immediate cytologic analysis, 280 (80.9%) of 346 malignant nodules were correctly identified without false-positive cases. With immediate subtyping, 113 (68.1%) of 166 cases of hepatocellular carcinoma, 28 (77.8%) of 36 cases of cholangiocarcinoma, and 113 (85.0%) of 133 cases of metastasis were detected.

CONCLUSION. High diagnostic accuracy for malignancy can be achieved with on-site cytologic evaluation of hepatic tumors. Specific diagnoses of hepatocellular carcinoma, cholangiocarcinoma, and metastasis also can be made on-site in most cases. The absence of false-positive diagnosis of malignancy at on-site cytologic examination may make additional biopsy unnecessary. We propose an algorithm for the cytohistopathologic management of hepatic tumors.

Keywords: core needle biopsy • fine-needle aspiration • immediate cytologic assessment • liver neoplasms

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