. The American journal of roentgenology, radium therapy and nuclear medicine . odontoidprocess and body of the axis, and the lateralmasses of the atlas. This is the case, andfrom these regions it may extend to the an-terior arch of the atlas, and to the condylesof the occiput. According to the amount of bone destruc-tion, various luxations take place which giverise to certain more or less characteristic de-formities, as well as to numerous secondarynerve pressure symptoms which have attimes led the diagnostician far afield in judg-ing the true condition. Such was the situa-tion in a case repor
. The American journal of roentgenology, radium therapy and nuclear medicine . odontoidprocess and body of the axis, and the lateralmasses of the atlas. This is the case, andfrom these regions it may extend to the an-terior arch of the atlas, and to the condylesof the occiput. According to the amount of bone destruc-tion, various luxations take place which giverise to certain more or less characteristic de-formities, as well as to numerous secondarynerve pressure symptoms which have attimes led the diagnostician far afield in judg-ing the true condition. Such was the situa-tion in a case reported by Merklen andShaeffer, of a woman, aged seventy, inwhom secondary ner\e symptoms so dom-inated the picture that the true cause of the tion of The American Roentgen Ray Society, Portland, Ore.,19^1- Suboccipital Potts Disease symptoms was not discovered. It seems amatter worthy of note that in an examina-tion which was complete and exhaustive inevery other feature, not once was the possi-bility considered that roentgen methodscould offer any help in the solution of the. k. Fir,. I. Compression of right lateral mass of atlas incase of suboccipital Potts disease. [)roblem, whtn this diagnostic means wasobviouslv the one best calculated to providethat solution. In this case autopsy alone re-vealed the true condition. Where there is destruction of the lateralmass of the atlas, either on one side or onlx)th sides, the occiput may settle down andforward and cause the odontoid process topenetrate the foramen magnum, and therewill ensue various symptoms of pressure onthe upper cord and bull) that will greatly con-fuse the clinical picture. Previous to the time of compression ofdiseased bone, at least so far as it causespressure symptoms, the patient will usuallyseek aid for severe pain in the posteriorportion of the neck, high up, particularly onmotion, and due in large part to the muscu-lar spasm on the side affected. A typical pic-ture of ordinary torticollis is seen, plus thepai
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