Subungual exostosis
Subungual exostoses are bony projections which arise from the dorsal surface of the distal phalanx, most commonly of the hallux.[1]
Presentation
They tend to be painful due to the pressure applied to the nail bed and plate. They can involve destruction of the nail bed.[2] These lesions are not true osteochondromas, rather it is a reactive cartilage metaplasia. The reason it occurs on the dorsal aspect is because the periosteum is loose dorsally but very tightly adherent volarly. [3]
Subungal malignant melanomas can also occur in canines.
They are distinct from subungual osteochondroma.[4]
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Subungual exostosis 01.JPG
Subungual exostosis (1/3), in a boy of 15 years old
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Subungual exostosis 02.JPG
Subungual exostosis (2/3)
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Subungual exostosis 03.JPG
Subungual exostosis (3/3), after excision
Treatment
Surgical excision is common and is a very effective mode of treatment.
See also
References
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- ↑ Murphey MD, Choi JJ, Kransdorf MJ, et al: Imaging of osteochondroma: variants and complications with radiologic-pathologic correlation. Radiographics 20:1407-1434, 2000
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
See also
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