(22q11 deletion) A congenital anomaly characterized by partial deletion of the short arm of chromosome 22.

Congenital syndrome characterized by a wide spectrum of characteristics including the absence of the THYMUS and PARATHYROID GLANDS resulting in T-cell immunodeficiency, HYPOCALCEMIA, defects in the outflow tract of the heart, and craniofacial anomalies.

Individuals with 22q11.2 deletion syndrome (22q11.2DS) can present with a wide range of features that are highly variable, even within families. The major clinical manifestations of 22q11.2DS include congenital heart disease, particularly conotruncal malformations (ventricular septal defect, tetralogy of Fallot, interrupted aortic arch, and truncus arteriosus), palatal abnormalities (velopharyngeal incompetence, submucosal cleft palate, bifid uvula, and cleft palate), immune deficiency, characteristic facial features, and learning difficulties. Hearing loss can be sensorineural and/or conductive. Laryngotracheoesophageal, gastrointestinal, ophthalmologic, central nervous system, skeletal, and genitourinary anomalies also occur. Psychiatric illness and autoimmune disorders are more common in individuals with 22q11.2DS.

(digeorge's syndrome) Congenital syndrome with the absence of the thymus and parathyroids causing impairment of cellular immunity; immunoglobulin levels are normal.

(22q deletion syndrome(s)) A group of phenotypically variable, mostly sporadic conditions caused by 1.5- to 3.0-Mb hemizygous deletions of chromosome 22q11.2. Haploinsufficiency of the TBX1 gene encoding the transcription factor T-box 1 is believed responsible for most of the physical findings. Clinical features may include cardiac anomalies, including truncus arteriosus and tetralogy of Fallot, as well as other anomalies, including micrognathia, thymic aplasia (with resultant immunodeficiency), cleft palate, and hypoparathyroidism.

(22q11.2 deletion syndrome) A congenital anomaly characterized by immunodeficiency, abnormal facies, congenital heart disease, hypocalcemia, and increased susceptibility to infections. Pathologic characteristics include conotruncal abnormalities and absence or hypoplasia of thymus and parathyroid glands. DiGeorge syndrome is associated with abnormalities of chromosome 22. Also known as DiGeorge anomaly.

DiGeorge syndrome is thymic and parathyroid hypoplasia or aplasia leading to T-cell immunodeficiency and hypoparathyroidism. Infants with DiGeorge syndrome have low-set ears, midline facial clefts, a small receding mandible, hypertelorism, a shortened philtrum, developmental delay, and congenital heart disorders. Diagnosis is based on...

22q11.2DS (DiGeorge syndrome, or DGS) has a wide range of clinical features, including the following: Abnormal facies Congenital heart defects Hypoparathyroidism with hypocalcemia Cognitive, behavioral, and psychiatric problems Increased susceptibility to infections due to thymic aplasia or hypoplasia Some collectively refer to these by...

DiGeorge syndrome, more accurately known by a broader term - 22q11.2 deletion syndrome - is a disorder caused when a small part of chromosome 22 is missing. This deletion results in the poor development of several body systems.

The classic presentation is a triad of cardiac anomalies, hypoplastic thymus, and hypocalcemia (resulting from parathyroid hypoplasia). 22q deletion syndrome (22qDS), described as DiGeorge syndrome or velocardiofacial syndrome, is the set of characteristic morphologic and neurologic features that result from the deletion of 1 copy of...