. Radiography and radio-therapeutics . s often not full of fine detail, withoutwhich no opinion on bone disease can be formed. In the same way a screenexamination will show a fracture, but an opinion of the bone conditioncannot be formed from it. The most usual conditions predisposing to frac-ture are : (1) Atrophy of bone. This may be senile, or due to disease, anky-losis of a joint or certain nervous affections. (2) Fragilitas ossium. This consists in an inherited tendency tospontaneous fracture, occurring in children and adults. (3) Bone disease, such as tuberculosis, rickets, syphilis
. Radiography and radio-therapeutics . s often not full of fine detail, withoutwhich no opinion on bone disease can be formed. In the same way a screenexamination will show a fracture, but an opinion of the bone conditioncannot be formed from it. The most usual conditions predisposing to frac-ture are : (1) Atrophy of bone. This may be senile, or due to disease, anky-losis of a joint or certain nervous affections. (2) Fragilitas ossium. This consists in an inherited tendency tospontaneous fracture, occurring in children and adults. (3) Bone disease, such as tuberculosis, rickets, syphilis, osteo-malacia. (4) Local bone disease or tumours, such as sarcoma, secondary car-cinoma. A condition which frequently leads to fracture is a cystic disease ofbone. Many examples have been showTi of late years occurring in the longbones, the humerus being a common seat of this tumour. It is frequentlya very slow form of myeloid sarcoma. Elmshe has drawn attention to this-cystic disease of bone, and shown several interesting [PLATE XL.—TuiiEKCULAR Disease of the Hip-Joint. a. Tubercular disease of hip-ioint affecting chiefly the upper part of acetabulum. b. Tubercular disease of hip, absorption of head and greater part of neck, ujjward displacement of femur.(Radiograph by Dr. Salmond.) „ x. ■> ^ i c. Later stage of tubercular disease of hip-joint, disorganisation and displacement of head, large aljscesson outer side of shaft of femur.
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