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Hyperparathyroidism 2 with jaw tumors
The spectrum of CDC73-related disorders includes the following phenotypes: Hyperparathyroidism-jaw tumor (HPT-JT) syndrome. Primary hyperparathyroidism, the main finding of HPT-JT syndrome, occurs in up to 95% of affected individuals; onset is typically in late adolescence or early adulthood. HPT-JT-associated primary hyperparathyroidism is usually caused by a single parathyroid adenoma. In approximately 10%-15% of individuals, primary hyperparathyroidism is caused by parathyroid carcinoma. Ossifying fibromas of the mandible or maxilla, also known as cementifying fibromas and cemento-ossifying fibromas, occur in 30%-40% of individuals with HPT-JT syndrome. Although benign, these tumors can be locally aggressive and may continue to enlarge if not treated. Approximately 20% of individuals with HPT-JT syndrome have kidney lesions, most commonly cysts; renal hamartomas and (more rarely) Wilms tumor have also been reported. Benign and malignant uterine tumors appear to be common in women with HPT-JT syndrome. Parathyroid carcinoma. Most parathyroid carcinomas are functional, resulting in hyperparathyroidism and a high serum calcium level; however, nonfunctioning parathyroid carcinomas are also rarely described in individuals with a CDC73-related disorder. A germline CDC73 pathogenic variant has been identified in 20%-29% of individuals with apparently sporadic parathyroid carcinoma. Familial isolated hyperparathyroidism (FIHP). FIHP is characterized by primary hyperparathyroidism without other associated syndromic features. Individuals with CDC73-related FIHP tend to have a more severe clinical presentation and younger age of onset than individuals with FIHP in whom a CDC73 pathogenic variant has not been identified. [from GeneReviews]
Partial lipodystrophy, congenital cataracts, and neurodegeneration syndrome
Lipodystrophies are rare disorders characterized by loss of body fat from various regions and predisposition to metabolic complications of insulin resistance and lipid abnormalities. FPLD7 is an autosomal dominant disorder with a highly variable phenotype. Additional features, including early-onset cataracts and later onset of spasticity of the lower limbs, have been noted in some patients (summary by Garg et al., 2015). For a general phenotypic description and a discussion of genetic heterogeneity of familial partial lipodystrophy (FPLD), see 151660. [from OMIM]
Hyperlipoproteinemia, type 1D
Hyperlipoproteinemia type ID is a rare autosomal recessive disorder characterized by impaired clearance of triglyceride (TG)-rich lipoproteins in plasma, leading to severe hypertriglyceridemia (chylomicronemia). Clinical features include eruptive xanthomas, lipemia retinalis, hepatosplenomegaly, episodes of abdominal pain, and pancreatitis. Onset usually occurs in adulthood (summary by Brahm and Hegele, 2013). For a discussion of genetic heterogeneity of familial chylomicronemia, see 238600. [from OMIM]
GCGR-related hyperglucagonemia
Mahvash disease (MVAH) is an autosomal recessive disorder caused by inactivating mutations in the glucagon receptor, leading to alpha-cell hyperplasia of the pancreas, hyperglucagonemia without glucagonoma syndrome, and occasional hypoglycemia. The disease may lead to glucagonomas and/or primitive neuroectodermal tumors (PNETs). [from OMIM]
Trichohepatoneurodevelopmental syndrome
Trichohepatoneurodevelopmental syndrome is a complex multisystem disorder characterized by woolly or coarse hair, liver dysfunction, pruritus, dysmorphic features, hypotonia, and severe global developmental delay (Morimoto et al., 2018). [from OMIM]
Chylomicronemia, familial, due to circulating inhibitor of lipoprotein lipase
Recurrent pancreatitis
A recurrent form of pancreatitis. [from HPO]
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