Distalphalanges are bones found in the limbs of most vertebrateskeletons. In humans, they are the finger bones located furthest from the shoulder joint, and the toe bones located furthest from the hip. They have a corresponding location in the limbs of most other vertebrates, including the fins of whales and the wings of birds. They are also usually conical.
Very often, distal phalanges are tipped with claws. In primates, they are covered by a protective nail. Animals which walk digitigrade (such as dogs) tread upon them, and humans commonly use them to push buttons, pinch, and hold small objects.
Onychonychia hypoplastic distalphalanges (medical condition): A rare disorder characterized by underdeveloped or missing end bones in fingers and toes as well as nail abnormalities ranging from underdeveloped to completely absent.
Onychonychia hypoplastic distalphalanges is listed as a "rare disease" by the Office of Rare Diseases (ORD) of the National Institutes of Health (NIH).
This means that Onychonychia hypoplastic distalphalanges, or a subtype of Onychonychia hypoplastic distalphalanges, affects less than 200,000 people in the US population.
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