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Ulnar dysplasia, a condition characterized by underdevelopment or absence of the ulna bone in the forearm, can be caused by various factors during fetal development. Genetic mutations, chromosomal abnormalities, and environmental influences such as maternal drug exposure or infections during pregnancy may contribute to its occurrence. Additionally, disruptions in blood flow to the developing limb or mechanical factors in the womb can also play a role. While the exact cause is often unclear, these factors can lead to the malformation of the ulnar bone.

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What is the difference between ulnar neuritis and ulnar neuropathy?

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