Mesenchymal hamartoma of the liver.
Mesenchymal hamartoma is a benign, cystic lesion that arises from connective tissues of the portal tracts. It is most common in children under 5 years of age. The diagnosis can be suspected when a relatively asymptomatic child has a large, smooth mass in the liver. Radionuclide scans demonstrate a solitary lesion, and on ultrasound there are cystic spaces and septa. These are perfectly benign lesions and may be simply enucleated.
D002675:Child, Preschool; D005260:Female; D006222:Hamartoma / Q000175:diagnosis / Q000473:pathology / Q000601:surgery*; D006801:Humans; D007223:Infant; D008113:Liver Neoplasms / Q000175:diagnosis / Q000473:pathology / Q000601:surgery*; D008297:Male