CEBALID syndrome

An autosomal dominant developmental disorder characterized by global developmental delay, intellectual disability with severe expressive language delay, craniofacial dysmorphism, and structural brain abnormalities. Most patients have an atypical form of rhombencephalosynapsis, a distinctive brain malformation characterized by partial or complete loss of the cerebellar vermis with fusion of the cerebellar hemispheres. Other frequent features include perisylvian polymicrogyria, abnormal posterior clinoid processes, cerebellar hypoplasia or dysplasia, and persistent trigeminal artery.

Cowden syndrome 1

An autosomal dominant hamartomatous polyposis syndrome with age-related penetrance. Cowden syndrome is characterized by hamartomatous lesions affecting derivatives of ectodermal, mesodermal and endodermal layers, macrocephaly, facial trichilemmomas (benign tumors of the hair follicle infundibulum), acral keratoses, papillomatous papules, and elevated risk for development of several types of malignancy, particularly breast carcinoma in women and thyroid carcinoma in both men and women. Colon cancer and renal cell carcinoma have also been reported. Hamartomas can be found in virtually every organ, but most commonly in the skin, gastrointestinal tract, breast and thyroid.

Breast cancer

A common malignancy originating from breast epithelial tissue. Breast neoplasms can be distinguished by their histologic pattern. Invasive ductal carcinoma is by far the most common type. Breast cancer is etiologically and genetically heterogeneous. Important genetic factors have been indicated by familial occurrence and bilateral involvement. Mutations at more than one locus can be involved in different families or even in the same case.

Rhabdoid tumor predisposition syndrome 1

A familial cancer syndrome predisposing to renal or extrarenal malignant rhabdoid tumors and to a variety of tumors of the central nervous system, including choroid plexus carcinoma, medulloblastoma, and central primitive neuroectodermal tumors. Rhabdoid tumors are the most aggressive and lethal malignancies occurring in early childhood.

Cardiac, facial, and digital anomalies with developmental delay

An autosomal dominant disorder characterized by delayed motor and speech development, developmental regression, congenital heart defects, limb and digital anomalies, and dysmorphic features. Cardiac features include pulmonary stenosis, patent ductus arteriosus, aortic coarctation, valvular defects, hypoplastic left heart, double outlet right ventricle, and conduction abnormalities. Dysmorphic facial features include multiple hair whorls or hairline abnormalities, ptosis, epicanthal folds, and low-set or dysplastic ears.

Meningioma

A common neoplasm of the central nervous system derived from arachnoidal cells. The majority of meningiomas are well differentiated vascular tumors which grow slowly and have a low potential to be invasive, although malignant subtypes occur. Most cases are sporadic. Familial occurrence of meningioma is rare.

Medulloblastoma

Malignant, invasive embryonal tumor of the cerebellum with a preferential manifestation in children.

Basal ganglia calcification, idiopathic, 5

A form of basal ganglia calcification, an autosomal dominant condition characterized by symmetric calcification in the basal ganglia and other brain regions. Affected individuals can either be asymptomatic or show a wide spectrum of neuropsychiatric symptoms, including parkinsonism, dystonia, tremor, ataxia, dementia, psychosis, seizures, and chronic headache. Serum levels of calcium, phosphate, alkaline phosphatase and parathyroid hormone are normal. The neuropathological hallmark of the disease is vascular and pericapillary calcification, mainly of calcium phosphate, in the affected brain areas.

Schwannomatosis, vestibular

An autosomal dominant neoplasia syndrome characterized by the development of multiple benign nerve sheath tumors called schwannomas, particularly affecting the vestibular nerve. Affected individuals usually present with bilateral vestibular schwannomas but can have schwannomas on other cranial, spinal, and peripheral/cutaneous nerves. Meningiomas are common, whereas 20 to 35% of affected individuals develop intramedullary spinal cord tumors called ependymomas. The condition is also characterized by several ophthalmic features such as lenticular opacities, retinal hamartoma, epiretinal membranes.