In simple words: This is a birth defect where the radius bone, one of the two bones in the forearm, is partially or completely missing.

Longitudinal reduction defect of unspecified radius. This condition is a congenital anomaly characterized by a partial or complete absence of the radius bone in the forearm.

Example 1: A newborn infant is examined and found to have a shorter forearm on one side. Imaging studies confirm a diagnosis of longitudinal reduction defect of the radius., A child presents with limited wrist motion and a noticeable deformity of the forearm. A diagnosis of longitudinal reduction defect of the radius is made, and the child is referred to an orthopedic specialist for further evaluation and management., A fetus undergoes a routine ultrasound, and the radiologist observes a significant shortening of one of the fetal forearms, raising suspicion for a longitudinal reduction defect of the radius.

Clinical examination findings describing the physical characteristics of the forearm and hand, including range of motion assessments. Imaging reports, such as X-rays, CT scans, or MRI, confirming the radial deficiency. Documentation of any functional limitations or associated anomalies.

** This condition may be associated with other congenital anomalies, such as radial club hand, and may impact hand function. Accurate diagnosis and prompt treatment are important for optimizing patient outcomes.