| Keen | William W., U.S. Surgeon, 1837-1932. See: Keen's operation, Keen's sign. (05 Mar 2000) |
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| Keen's operation | Removal of sections of the posterior branches of the spinal nerves to the affected muscles, and of the spinal accessory nerve, as a cure for torticollis. (05 Mar 2000) |
| Keen's sign | <clinical sign> Increased width at the malleoli in Pott's fracture. (05 Mar 2000) |