In simple words: This code is for a birth defect where the ulna bone in the forearm is shorter than normal or partially missing. This can affect the shape and function of the hand and forearm.

This code describes a congenital anomaly characterized by an incomplete development or shortening of the ulna bone in the forearm.The ulna is one of the two bones in the forearm, located on the medial (pinky finger side) aspect.The severity of the defect can vary, ranging from mild shortening to complete absence of a portion of the bone.Associated conditions may include hand deformities or limitations in forearm function.

Example 1: A newborn infant presents with a noticeably shorter forearm on one side, with limited range of motion in the wrist and hand. Radiographic imaging confirms a longitudinal reduction defect of the ulna., A child diagnosed with this condition at birth undergoes serial clinical assessments, including physical therapy and orthotic interventions, to manage their functional limitations., An adult patient with a history of this condition seeks surgical consultation to consider corrective procedures to improve hand function and cosmetic appearance.

Detailed prenatal history (including maternal illness and medication use), physical examination findings (including measurements of forearm length and range of motion), radiographic images (X-rays, CT scans), and genetic testing results (if indicated) should be documented.

** Further sub-classification may be required based on laterality (right or left) and the degree of severity of the defect.This diagnosis code is used for reporting purposes and does not define the treatment approach.