Trisomy 9

Trisomy 9 is a chromosomal abnormality characterized on chromosome 9 may or may not have mosaicism. Symptoms vary, but generally occur deformations nocrânio and nervous system, and mental retardation occurs. Heart problems, kidney and musculoskeletal system may occur.

Trisomy 9 is a chromosomal abnormality characterized on chromosome 9, trisomy 9 is considered a rare chromosomal abnormality, with just over 50 cases reported in the literature since its first description in 1973. In trisomy 9 mosaicism may or may not have (which is a disorder that occurs as a variation in the number of chromosomes in the cells of the body, ie it is called mosaic to an individual with two distinct genetic material, but from the same zygote). Symptoms vary, but usually occur in the skull deformities and nervous system, and mental retardation occurs. Heart problems, kidney and musculoskeletal system (locomotor system What is the body made up of bones and muscles).

This chromosomal variation and very rare. Few cases have been reported in the medical literature.