A Normal X-Ray Does Not Rule This One Out. It Barely Looks for It.
Deep, aching pain in the heel of your palm on the little-finger side, after a golf club hit the ground hard, a checked baseball swing, or a racquet handle taking an impact.
You had an X-ray. It was normal. You were told it was a bruise or a sprain, and weeks later it still hurts when you grip.
That pattern is a fractured hook of the hamate until someone proves otherwise, and proving otherwise needs a CT scan, not another standard wrist X-ray.
This is the second bone in the wrist that hides. The scaphoid is the famous one. This is the one nobody warns you about.
What the hook is, and why it breaks
The hamate is one of the eight small carpal bones, sitting on the little-finger side of the wrist. It has a hook of bone that projects forward into the palm, like a small bollard.
That hook does two jobs. It anchors ligaments, and it acts as a pulley that the flexor tendons to the ring and little fingers curve around on their way to those fingers.
It breaks in two ways.
The common one is a handle driven into the palm:
- the butt of a golf club as the head catches turf,
- a bat on a mishit,
- a hockey stick,
- a racquet
- etc
The handle levers directly against the hook.
The other is repeated loading in the same spot over time, which is why this specific injury often turns up in cyclists and in people using vibrating tools.
Find it on yourself
Turn your palm up. Find the pea-sized bone at the base of your palm on the little-finger side, the one you can roll under your fingertip. That’s the pisiform.
Now move about a centimetre or so towards your thumb and a centimetre towards your fingers, and press in firmly and deeply.
Sharp, specific, deep pain there, distinctly worse than the same spot on your other hand, is the finding that should trigger a scan.
(It needs to be a proper press. The hook sits deep under a pad of tissue, which is part of why it gets dismissed as soft tissue soreness.)
Why the X-ray misses it
A standard wrist series looks straight through the wrist, and the hook is a small projection pointing directly at the camera, hidden behind the overlapping shadows of the other carpal bones.
There are special views that show it better, a carpal tunnel view and an oblique, but they have to be specifically requested and are not part of a routine set.
CT is the test that settles it.
“The X-ray was normal” answers a different question from “is the hook of my hamate broken”. Only one of those was actually asked.
What happens if it’s left
This is the part that makes the missed diagnosis expensive rather than just annoying.
First, it often doesn’t heal. The hook has a modest blood supply, the fragment gets pulled on by attached ligaments, and nobody rests a hand for six weeks for a diagnosis they were told they don’t have. Non-union is a well-recognised outcome.
Second, the ulnar nerve runs immediately alongside the hook, on its way through Guyon’s canal. A broken, mobile fragment sitting next to a nerve produces exactly what you’d expect: numbness and tingling in the ring and little fingers, and eventually weakness of the small muscles of the hand.
Third, and worst, the flexor tendons to the ring and little fingers curve around that hook. A broken hook leaves a rough edge, and a tendon that rubs on a rough edge for long enough frays and then ruptures.
That’s the sequence I want people to understand. Sudden inability to bend the little finger, months after an injury that was called a sprain, is a ruptured tendon caused by a fracture nobody found. It’s a bigger operation than the one that would have prevented it.
Treatment, and what recovery looks like
Caught acutely, undisplaced, in someone willing to be strict: cast immobilization for about 6 weeks is reasonable. Union is not guaranteed, and everyone involved should know that going in.
For everything else, which in practice is most cases because most are found late, the standard treatment is surgical excision of the hook fragment.
That usually surprises people.
…because honestly, cutting out a piece of bone sounds drastic. Especially if it’s OUR own bone. It’s not like we’re deboning chicken or meat. The hook is not load-bearing in the way the rest of the wrist is, excision reliably removes the pain, and long-term grip strength holds up well. It’s one of the more satisfying operations in this region.
Typical timeline after excision:
- Weeks 0 to 2: soft dressing or splint, wound settling, fingers moving fully from day one.
- Weeks 2 to 6: scar management, grip work built gradually. The scar sits in the palm where you grip, so it needs specific desensitising work or it stays tender.
- Weeks 6 to 12: return to sport, typically starting around 6 to 8 weeks for most, with full unrestricted power grip nearer 3 months.
If the nerve was already affected, add nerve recovery time on top, and that runs on the nerve’s schedule, not yours.
The short version
Deep pain in the heel of the palm on the little-finger side, after a handle impact or a mishit, that hasn’t settled: press on the hook and compare sides.
If that spot is sharply tender, ask specifically for imaging that can see the hook of the hamate, and don’t accept a routine X-ray as the answer.
The reason to push is not the fracture. It’s the nerve beside it and the tendons running over it.
Written by Nigel Chua, hand occupational therapist in practice since 2005. Tens of thousands of hands, wrists and elbows assessed and treated. My credentials are here. This article explains; it doesn’t examine. Sudden loss of the ability to bend a finger needs seeing the same day.