. The American journal of roentgenology, radium therapy and nuclear medicine . n the angle be eenthe cuboid and the 5th metatarsal, andarticulates with both. The bone is pyra-midal in shape with the apex directedposteriorly. The base is about 8 mm. in alateral direction and 12 mm. in the dorso-plantar direction. From base to apex it isabout 10 mm. The base, which is at a rightangle to the long axis of the 5th metatarsal,usually coalesces with a correspondingsurface on the posterior end of that it articulates with thecuboid. It is easily seen in the roentgenogram. 4io The
. The American journal of roentgenology, radium therapy and nuclear medicine . n the angle be eenthe cuboid and the 5th metatarsal, andarticulates with both. The bone is pyra-midal in shape with the apex directedposteriorly. The base is about 8 mm. in alateral direction and 12 mm. in the dorso-plantar direction. From base to apex it isabout 10 mm. The base, which is at a rightangle to the long axis of the 5th metatarsal,usually coalesces with a correspondingsurface on the posterior end of that it articulates with thecuboid. It is easily seen in the roentgenogram. 4io The Supernumerary Pedal Bones Geist reported seeing it once in ioo cases,and Weinberg, 3 times in about 300 feetexamined by means of the roentgen these writers were extremely fortu-nate, or else their cases were instances ofunfused proximal epiphyses. The writerhas never seen what could be with certaintycalled an os vesali pedis in the adult(Fig. 1 1 ). Os Peroneum. The peroneum was firstdescribed by Vesalius, but more accuratelyand completely by Pfitzner, who showed. Fig. 11. Os vesalii (after Duight). that it is a supernumerary ossicle, andnot a sesamoid bone in the tendon of theperoneus longus. In the well-developedform, the tendon of the m. peroneus longuspasses over it and is united to it by only atew libers, while the migrated rudimentaryform is entirely enclosed by the tendon. Itdoes not appear to articulate with thecuboid, near whose lower lateral border itis placed. Form and size vary, so that it isdifficult to assume a normal. It is fre-quently subdivided. According to Pfitznerit is seen in about 8 per cent of all feet. Itfrequently escapes observation, with theplantar surface of the foot on the film, butis best seen in the lateral views with thelateral side of the foot on the film ( Figs. 9and 12). From the foregoing descriptions of theindividual supernumerary bones it is quitee\ ident that most of them appear relativeljfrequentlj in the normal foot. It is usu
Size: 1864px × 1341px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthoramerican, bookcentury1900, bookdecade1900, bookyear1906
