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  • Title: A case of well-differentiated, fetal-type hepatoblastoma with very low serum alpha-fetoprotein.
    Author: Tsuchida Y, Ikeda H, Suzuki N, Takahashi A, Kuroiwa M, Sakai M, Shimizu H, Shitara T, Yamanouchi H, Hirato J.
    Journal: J Pediatr Surg; 1999 Dec; 34(12):1762-4. PubMed ID: 10626849.
    Abstract:
    Serum alpha-fetoprotein (AFP) is elevated in 96.6% of infants and children with hepatoblastoma and hepatocarcinoma. Serum AFP was of normal level in only one case of immature-type hepatoblastoma, and very low in only one case of fetal-type hepatoblastoma among 43 cases reviewed in 1986. Recently, a case of hepatoblastoma with very low serum AFP was encountered in the authors' surgical department. In October 1998, a 55-month-old girl was admitted. Her birth weight was 717 g. A large space-occupying lesion (SOL) located in the left lobe of the liver was seen by magnetic resonance imaging (MRI), and her serum AFP level was 322 ng/mL with a subfractionation pattern of the "benign liver disease" type based on reactivity with lens culnaris hemagglutinin and concanavalin A. The patient underwent successful left lobectomy, and histological examination showed that the tumor, weighing 268 g, was hepatoblastoma of the well-differentiated, fetal type. Immunohistochemistry findings for AFP were negative. A hepatic mass in infants and children with low serum AFP level indicates the presence of either well-differentiated or immature hepatoblastoma, or fibrolamellar hepatocellular carcinoma. Subfractionation of AFP may contribute to the differential diagnosis of these subtypes.
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