Q71.5: Longitudinal reduction defect of ulna

There are normally 2 bones in the forearm. These bones are called the ulna and the radius.

There may be a number of different reasons for the ulna not being properly developed. Certain congenital diseases can lead to an underdeveloped ulna, for example. Taking certain medication during pregnancy can result in the child’s ulna not being properly developed. This means the child’s arm can be bent or shortened, for example.

Patient Disclaimer

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.