Subungual osteochondroma is a benign exostosis (bone growth) that occurs on the dorsum of the last phalanx of the fingers, pressing into the nail growth zone and causing pain.
What causes subungual osteochondroma?
Subungual osteochondroma is usually due to previous trauma or anatomical alterations of the toe whereby a hyperextension position (toe raised at the tip) results in the development of a subungual osteochondroma.
What are the symptoms of subungual osteochondroma?
Due to its slow development, the symptoms of subungual osteochondroma have not been clearly recognised, so if radiological examinations are not performed, it can go unnoticed.
It is sometimes found because in addition to the nails falling off and becoming deformed, it can also cause pain due to pressure on the fingertips.
Treatment of subungual osteochondroma
Treatment of subungual osteochondroma can only be removed by surgery without damaging the nail. This operation is performed under local anaesthesia and a small incision is made at the end of the finger, about 3 mm with minimally invasive surgery techniques, without requiring hospitalisation and leaving on your own feet at the end of the surgery.
The following are some of the differences between subungual exostosis, which is a pathology that is often confused.
- Benign bone proliferation
- May appear from the 2nd and 3rd decade of life onwards.
- Located at the end of the first distal phalanx.
- It is indistinguishable from bone and grows eccentrically until it reaches the bone.
- Smaller in size.
- Caused by acute trauma or repetitive microtrauma.
- Pain on pressure, subungual helomas, deformation of nail plate.
- Only visible on lateral X-ray of the finger.
- Not malignant type.
- Benign bone tumour.
- Covered by cartilaginous tissue.
- Appears between 10 and 25 years of age (the age at which bones grow).
- Located in the growth plate of the first distal phalanx.
- Unlike bones, it can grow inside bones or grow eccentrically.
- Larger size.
- Caused by bone growth disorders.
- Periosteal differentiation
- Perforation of the nail bed and deformation of the nail plate.
- Visible on anteroposterior and lateral X-ray of the finger.
- Can be malignant type