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Related Experiment Videos

Variable antigen expression in hepatoblastomas.

Alan D Ramsay1, Alan W Bates, Susan Williams

  • 1Great Ormond Street Hospital for Children, London WC1N 3JH, UK. a.ramsay@ucl.ac.uk

Applied Immunohistochemistry & Molecular Morphology : AIMM
|January 30, 2008
PubMed
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Hepatoblastoma diagnosis in children is challenging due to variable tumor cell markers. Immunohistochemistry shows hepatoblastomas express diverse antigens, complicating diagnosis and requiring integrated clinical, imaging, and pathology findings.

Area of Science:

  • Pediatric Oncology
  • Surgical Pathology
  • Immunohistochemistry

Background:

  • Hepatoblastoma is a common pediatric liver malignancy, typically diagnosed via needle biopsy.
  • Accurate diagnosis is crucial but challenging due to potential overlap in morphologic features with other childhood tumors.
  • Immunohistochemistry aids in differentiating hepatoblastoma from other small round blue cell tumors.

Purpose of the Study:

  • To investigate the immunophenotypic profile of hepatoblastoma in needle core biopsies.
  • To determine if hepatoblastoma exhibits a distinct diagnostic immunohistochemical phenotype.
  • To assess the utility of standard antibody panels in diagnosing hepatoblastoma.

Main Methods:

  • Analysis of 12 hepatoblastoma needle core biopsies confirmed by resection.

Related Experiment Videos

  • Immunohistochemical staining using antibodies for cytokeratins, alpha-fetoprotein, alpha-1-antitrypsin, MIC-2 (CD99), NCAM (CD56), NB84, desmin, BCL2, vimentin, PGP9.5, and neurone-specific enolase.
  • Evaluation of marker expression in relation to tumor diagnosis and differential diagnosis of childhood malignancies.

    • Main Results:

    • Hepatoblastomas commonly expressed cytokeratins (10/12).
    • Alpha-fetoprotein and alpha-1-antitrypsin staining were positive in 7/12 and 5/12 cases, respectively.
    • Frequent expression of antigens associated with other tumors was observed, including MIC-2 (CD99) in 8/12, NCAM (CD56) in 4/12, and NB84 in 3/12 cases.

    Conclusions:

    • Primitive cells in hepatoblastoma display a variable immunophenotype.
    • Hepatoblastoma can express antigens typically found in other pediatric malignancies, lacking a distinct immunohistochemical profile.
    • Diagnosis of hepatoblastoma necessitates a comprehensive approach combining clinical, imaging, and pathological findings.