Hook nail

Signs and symptoms

The nail plate has volar concavity and a longitudinal hypercurvature. The patient may report discomfort, aesthetic impairment, and functional disability.

Causes

Hook nail is caused by trauma to the hyponychium. Hook nail is often seen after a fingertip amputation.

Prevention

Some publications propose shortening the nail bed to the end of the bony support if it continues past the limit of the severed distal phalanx in order to prevent deformity. Treatments intended to preserve length, such as replantation or flap reconstruction, should be used if the damage to the bone and soft tissue beneath the nail bed is too great.

Treatment

Surgical options for hook-nail deformity include nail excision or finger shortening; alternatively, soft tissue reconstruction, bone grafting, nail recession, or partial toe transfer may be used to try to add some support to the nail bed.

References

References

1. Freedberg, et al. (2003). ''Fitzpatrick's Dermatology in General Medicine''. (6th ed.). McGraw-Hill. {{ISBN. 0-07-138076-0.
2. (2024). "Hook nail deformity". Elsevier BV.
3. (1993). "Treatment and prevention of "hook nail" deformity with anatomic correlation". Elsevier BV.
4. (2001). "Prevention of the Parrot Beak Deformity in Fingertip Injuries". Hand Surgery.
5. (1999). "Reconstruction of Fingertip Amputations with Full-Thickness Perionychial Grafts from the Retained Part and Local Flaps". Ovid Technologies (Wolters Kluwer Health).