Partial deletion of chromosome 10 syndrome

Partial deletion of chromosome 10 syndrome (also referred to as partial monosomy 10 or 10p/10q partial deletion syndrome) encompasses a group of rare chromosomal disorders in which a portion of chromosome 10 is missing (deleted). The clinical presentation varies considerably depending on the size and specific location of the deleted segment — whether it involves the short arm (10p), the long arm (10q), or both. Common features may include intellectual disability, developmental delay, growth retardation, craniofacial dysmorphisms (such as microcephaly, broad or flat nasal bridge, low-set ears, and micrognathia), and congenital heart defects. Some patients may also present with limb anomalies, urogenital malformations, hearing impairment, and ocular abnormalities. Because the phenotype is highly variable and depends on which genes are lost in the deleted region, the severity of the condition ranges from mild to severe. Deletions involving the 10p region, particularly 10p13-p14, have been associated with DiGeorge syndrome-like features including hypoparathyroidism, immune deficiency, and cardiac anomalies (known as DiGeorge syndrome type 2). Deletions of the 10q region may be associated with distinct patterns of malformations and cognitive impairment. There is no cure for partial deletion of chromosome 10 syndrome. Management is supportive and symptom-based, typically involving a multidisciplinary team including pediatricians, cardiologists, endocrinologists, speech and occupational therapists, and special education professionals. Early intervention programs for developmental delays and regular monitoring for associated complications such as cardiac defects, immune dysfunction, and endocrine abnormalities are essential components of care. Genetic counseling is recommended for affected families.

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