At its posterior and external part the pisiform bone forms a prominence.
The pisiform also is well developed, but there is no radial sesamoid.
The bones of the proximal row are the radiale, the ulnare, and the pisiform.
The pisiform is called the hooked bone in some veterinary anatomies.
The pisiform bone, situated at the external part of the first row of bone, is prominent posteriorly.
The ulnare, intermedium and pisiform are comparatively large flattened bones, the others are small and cubical.
The pisiform is large and several other sesamoid bones occur.
pisiform pi·si·form (pī'sə-fôrm')
Resembling a pea in size or shape. n.