MedGen

Cerebral cavernous malformations (CCMs) are vascular malformations in the brain and spinal cord comprising closely clustered, enlarged capillary channels (caverns) with a single layer of endothelium without mature vessel wall elements or normal intervening brain parenchyma. The diameter of CCMs ranges from a few millimeters to several centimeters. CCMs increase or decrease in size and increase in number over time. Hundreds of lesions may be identified, depending on the person's age and the quality and type of brain imaging used. Although CCMs have been reported in infants and children, the majority become evident between the second and fifth decades with findings such as seizures, focal neurologic deficits, nonspecific headaches, and cerebral hemorrhage. Up to 50% of individuals with FCCM remain symptom free throughout their lives. Cutaneous vascular lesions are found in 9% of those with familial cerebral cavernous malformations (FCCM; see Diagnosis/testing) and retinal vascular lesions in almost 5%. [from GeneReviews]

Zonular cataracts are defined to be cataracts that affect specific regions of the lens. [from HPO]

Hepatocellular carcinoma is the major histologic type of malignant primary liver neoplasm. It is the fifth most common cancer and the third most common cause of death from cancer worldwide. The major risk factors for HCC are chronic hepatitis B virus (HBV) infection, chronic hepatitis C virus (HCV) infection, prolonged dietary aflatoxin exposure, alcoholic cirrhosis, and cirrhosis due to other causes. Hepatoblastomas comprise 1 to 2% of all malignant neoplasms of childhood, most often occurring in children under 3 years of age. Hepatoblastomas are thought to be derived from undifferentiated hepatocytes (Taniguchi et al., 2002). [from OMIM]

A tumor (abnormal growth of tissue) of the liver. [from HPO]

A rare aggressive malignant hepatic tumour arising from the hepatocytes. It develops mainly in children over 10 years of age, either in a cirrhotic background, or more commonly in a non-cirrhotic background. The main presenting manifestations are abdominal mass with pain, swelling and discomfort, weight loss, and anorexia. Splenomegaly, nausea, vomiting and jaundice are less commonly observed. Metastases to the mediastinal lymph nodes, lungs, brain and bone marrow are common in advanced disease May be associated with congenital diseases such as biliary atresia. The Wnt/beta-catenin pathway is frequently activated via stabilising mutations in beta-catenin: some patients have been found to have mutations in the CTNNB1 (3p21) and MET (7q31) genes. TP53 (17p13.1) gene and the TERT promoter are mutated in 25-30% and 60% of cases respectively. [from SNOMEDCT_US]