Q90-Q99: Chromosomal abnormalities, not elsewhere classified
Chromosomal abnormalities refer to changes in the standard 23 pairs of human chromosomes that occur when there is an error during cell division, typically in the egg or sperm. This group of conditions can cause a variety of physical and intellectual anomalies. Chromosomal abnormalities can be inherited but more often they occur randomly during the formation of reproductive cells. Common types of chromosomal abnormalities include Down syndrome (trisomy 21), Turner syndrome (missing or incomplete X chromosome) and Klinefelter syndrome (an extra X chromosome in males). Symptoms can vary broadly depending on the specific type of abnormality but may include physical deformities, growth delays, learning disabilities and problems with the heart, brain, and other vital organs. The progression of these diseases can vary, some may worsen over time while others remain stable. Early diagnosis can help manage the symptoms and improve the quality of life of affected individuals.
Q90: Down syndrome
Q91: Edwards syndrome and Patau syndrome
Q92: Other trisomies and partial trisomies of the autosomes, not elsewhere classified
Q93: Monosomies and deletions from the autosomes, not elsewhere classified
Q95: Balanced rearrangements and structural markers, not elsewhere classified
Q96: Turner syndrome
Q97: Other sex chromosome abnormalities, female phenotype, not elsewhere classified
Q98: Other sex chromosome abnormalities, male phenotype, not elsewhere classified
Q99: Other chromosome abnormalities, not elsewhere classified
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The information provided on this page is for general educational purposes only. It is not intended for self-diagnosis and does not replace professional medical advice. Always consult your doctor or a qualified healthcare provider with any questions or concerns about your health.
If you see an ICD diagnosis code (e.g., on a medical report), be aware that doctors may also include additional indicators to express diagnostic certainty. Only a healthcare professional can interpret these codes accurately in the context of your individual case.
For a complete understanding of your condition and what the diagnosis means for you, please speak directly with your doctor.