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      Unusual hepatic tumor with features of mesenchymal hamartoma and congenital solitary nonparasitic cyst.

      Pediatric and developmental pathology : the official journal of the Society for Pediatric Pathology and the Paediatric Pathology Society
      Adolescent, Aneuploidy, Biological Markers, analysis, Cysts, congenital, metabolism, pathology, Flow Cytometry, Hamartoma, surgery, Hepatectomy, Humans, Immunohistochemistry, Karyotyping, Liver Diseases, Male, Mucus, Tomography, X-Ray Computed, Treatment Outcome

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          Abstract

          We report a hepatic tumor in an adolescent that does not fit into any of the described categories of liver tumors. The patient presented with hepatomegaly, abdominal pain, and normal liver function test; the tumor was cystic in imaging studies. The resected specimen, result of a partial hepatectomy, measured 21 cm and was multicystic with solid areas. Microscopically, the cysts were lined by a mucous-producing or intestinal-type epithelium, associated with smooth muscle and small mucous-producing glands. The solid component contained fibrous and adipose tissue, smooth muscle and thick-walled vessels. Aneuploidy was demonstrated by flow cytometry. We interpreted the tumor as having features of a mesenchymal hamartoma and congenital solitary nonparasitic cyst. It is conceivable that the lesions originated with small peribiliary glands with dilatation and intestinal metaplasia.

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