Differential Diagnosis for Bony Excrescence on Distal End of Great Toe Phalanx
- Single Most Likely Diagnosis
- Hallux valgus with associated bunion or osteophyte formation: This is a common condition where the big toe deviates towards the second toe, often resulting in a bony prominence on the distal end of the great toe phalanx due to osteophyte formation or bunion development.
- Other Likely Diagnoses
- Traumatic avulsion fracture: A history of trauma could lead to an avulsion fracture at the distal end of the great toe phalanx, presenting as a bony excrescence.
- Osteochondroma: A benign bone tumor that can occur on the distal end of bones, including the phalanges, and may present as a bony excrescence.
- Enchondroma: A type of benign bone tumor that originates from cartilage and can cause a bony excrescence, especially if it involves the distal phalanx.
- Do Not Miss Diagnoses
- Osteosarcoma or other malignant bone tumors: Although rare, these conditions can present with a bony excrescence and would have significant implications for treatment and prognosis if missed.
- Infection (osteomyelitis): Chronic infection of the bone can lead to formation of a bony excrescence or sequestrum, which would require prompt antibiotic treatment or surgical intervention.
- Rare Diagnoses
- Turret exostosis: A rare condition characterized by a bony growth on the distal phalanx, often associated with a history of trauma.
- Subungual exostosis: A benign bone tumor that occurs under the nail, which can cause a bony excrescence on the distal end of the great toe phalanx.
- Multiple hereditary exostoses: A rare genetic condition characterized by the development of multiple osteochondromas, which could potentially involve the distal end of the great toe phalanx.