Annals of medical history . ference of the normal articularsurface of one of the vertebrae measures27 cm., and the same measurement around dal vein and artery, is commonly present inthe tail of these reptiles. The growth of thediseased portion is unequal and has in-volved more of the vertebra on one sidethan on the other; likewise, the growthhas attained greater lateral dimensions onone side. The enlargement is somewhat suggestiveof the lesion of chronic osteomyelitis. Itmay be a callous growth, possibly due toa fracture of the caudal vertebrae; or itmay be a bone tumor. The character of thele
Annals of medical history . ference of the normal articularsurface of one of the vertebrae measures27 cm., and the same measurement around dal vein and artery, is commonly present inthe tail of these reptiles. The growth of thediseased portion is unequal and has in-volved more of the vertebra on one sidethan on the other; likewise, the growthhas attained greater lateral dimensions onone side. The enlargement is somewhat suggestiveof the lesion of chronic osteomyelitis. Itmay be a callous growth, possibly due toa fracture of the caudal vertebrae; or itmay be a bone tumor. The character of thelesion is naturally problematic, but it isinteresting that pathological growths in the Studies in Paleopathology 389 early geological periods so closely resemblethe lesions of today. Section of the tumormass shows the presence of numerous vascu-lar spaces, so that in this respect it re-sembles a hsemangioma. Microscopic studyof the periphery (Fig. 16) shows the pres-ence of well-developed Haversian systemsof osseous Fig. 15. Outline sketch showing normal appear-ance of the two vertebrae, based on Diplodocus andApatosaurus. A=chevron. This process in thepathological specimen has been shoved far ventral-ward and involved in the tumor-like mass. t» t
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Keywords: ., bookauthorp, bookcentury1900, bookdecade1910, booksubjectmedicine
