. A radiographic atlas of the pathologic changes of bones and joints . PLATE XXX. •91 — SYPHILIS. Distinguised on the radiogram by the darker hue of boneand the thickened and irregular outline of the periostal cover-ing, due to the condensing osteitis in and on the surface of thebone and the deposit of new bone under the periosteum. Thedisease usually commences in the periosteum, which becomesthickened and infiltrated (Plate XXXII), with or without theformation of the bony matter. As the disease progresses, thechannels in the bone, enlarged by a rarefying osteitis, formingirregular defects, ar
. A radiographic atlas of the pathologic changes of bones and joints . PLATE XXX. •91 — SYPHILIS. Distinguised on the radiogram by the darker hue of boneand the thickened and irregular outline of the periostal cover-ing, due to the condensing osteitis in and on the surface of thebone and the deposit of new bone under the periosteum. Thedisease usually commences in the periosteum, which becomesthickened and infiltrated (Plate XXXII), with or without theformation of the bony matter. As the disease progresses, thechannels in the bone, enlarged by a rarefying osteitis, formingirregular defects, are filled with new fibrous tissue (PlatesXXXIII, XXXIV). The process is not infrequently associatedwith suppuration (Plate XXXV, and the necrosis of a largeror smaller portion of bone (Plate XXXVI). — 92 — PLATE XXXI. SYPHILITIC GUIIMATA OF THE JIUSCLES OF THE THIGH. The shadow seen in the muscles of the anterior surface of the thigh isa mass of sclerotic tissue of s\-philitic PLATE XXXI. — 94- PLATE XXXir. SYPHILITIC TERIOSTITIS OF THE TIBIA. Tlic periosteum is swollen and raised. The shadow is darker than in the other forms of periostitis, and itsouthne is rough instead of smooth (see Plate XXXVII). The irregular darker areas indicate the presence under tlie periosteumuf new formation sclerotic or bone tissue, due to the syphilitic process.
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