Acro-osteolysis (plural: acro-osteolyses) refers to resorption of the distal phalanx. The terminal tuft is most commonly affected. It is associated with a heterogeneous group of pathological entities and, some of which can be remembered by using the mnemonic PINCH FO.
When there is linear bone resorption of the midshaft of the distal phalanx with a relatively spared terminal tuft, the condition is also referred to as band acro-osteolysis and carries a more limited differential diagnosis.
Pathology
Multiple digits
Terminal tuft resorption
Midshaft resorption (band acro-osteolysis)
Single digit
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