Abstract
At the time point of diagnosis, subsets of hepatocellular carcinoma (HCC) show a small size. Part of these lesions are early cancers, but there are also small HCCs with a distinct histologic pattern. Lesions with a diameter of 3.5 cm or less were formerly termed minute HCC. Today, early HCC is frequently identified as a nodular HCC measuring 2 cm or less in diameter, the limit of 2 cm having been settled in an international consensus conference. These small neoplasms come in two basic growth patterns, one characterized by vaguely nodular, well-differentiated tumors (small HCC with indistinct margins or vaguely nodular small HCC) and the other by distinctly nodular tumor with the histology of ordinary HCC. Early and small HCCs are usually asymptomatic, but are associated with liver cirrhosis in most patients. At least part of early HCCs show a histological presentation that differs in several respects from that of larger ordinary HCCs, suggesting that some of these small tumors are not simply early stages of a classical HCC progression pathway, but rather represent a distinct variant of HCC.
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Zimmermann, A. (2017). Early or Small Hepatocellular Carcinoma. In: Tumors and Tumor-Like Lesions of the Hepatobiliary Tract. Springer, Cham. https://doi.org/10.1007/978-3-319-26956-6_8
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