The 5 Finger Hand is a rare congenital hand difference which I have written about in this blog once before, HERE.. It is, as it sounds, the presence of 5 fingers, all in the same plane, instead of 4 fingers and a shorter (2 phalanx), palmarly placed thumb. The challenges of the 5 Finger Hand include
– a lack of a full first web space which is so important for large object grasp
– a finger with its extra length instead of the thumb
– a notable appearance difference
These images show a 5 Finger Hand with a small extra thumb.
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| The 5 Finger Hand with a small extra thumb |
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| The 5 Finger Hand with a small extra thumb |
When I consider the 5 Finger Hand, two other diagnoses come to mind. First is the mirror hand as I have written about HERE. This diagnosis is clearly different but the extra finger and the general hand appearance and the surgical strategies for reconstruction all make me consider the two diagnoses in a similar fashion. And second, the thumb in the plane of the hand. I have previously shared my thoughts in this blog specifically around ulnar deficiency and the thumb in the plane of the hand/ fingers HERE. We have also shared our experience in the medical literature HERE.