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Updated: June 7, 2025
Syphilitic sequestra are heavier and denser than normal bone, because sclerosis usually precedes death of the bone. The bones especially affected by gummatous disease are: the skull, the septum of the nose, the nasal bones, palate, sternum, femur, tibia, and the bones of the forearm. In the bones of the skull, gummata may form in the peri-cranium, diploë, or dura mater.
In later years the tibia may present alterations in shape resulting from antecedent gummatous disease for example, nodular thickenings of the shaft, flattening of the crest, or a more uniform increase in thickness and length of the shaft of the bone, which, when it is curved in addition, is described as the "sabre-blade" deformity.
+Nature of the Tissue Change in Late Syphilis Gummatous Infiltration.+ The essential happening in late syphilis is that body tissue in which the germs are present is replaced by an abnormal tissue, not unlike a tumor growth. The process is usually painless. This material is shoddy, so to speak, and goes to pieces soon after it grows.
Choroiditis and retinitis may also occur, and leave permanent changes easily recognised on examination with the ophthalmoscope. Among the rarer and more serious lesions of the inherited disease may be mentioned gummatous disease in the larynx and trachea, attended with ulceration and resulting in stenosis; and lesions of the nervous system which may result in convulsions, paralysis, or dementia.
If a periosteal gumma breaks down and invades the skin, a syphilitic ulcer is formed with carious bone at the bottom. A central gumma may eat away the surrounding bone to such an extent that the shaft undergoes pathological fracture. In the rare cases in which it attacks the articular end of a long bone, gummatous disease may implicate the adjacent joint and give rise to syphilitic arthritis.
If the gummatous tissue degenerates and breaks down, and especially if the overlying skin is perforated and septic infection is superadded, the bone disintegrates and exhibits the condition known as syphilitic caries; sometimes a portion of bone has its blood supply so far interfered with that it dies syphilitic necrosis.
#Later Lesions.# In the skin and subcutaneous tissue, the later manifestations may take the form of localised gummata, which tend to break down and form ulcers, on the leg for example, or of a spreading gummatous infiltration which is also liable to ulcerate, leaving disfiguring scars, especially on the face. The palate and fauces may be destroyed by ulceration.
+Destructive Changes, Bones, Teeth, Etc.+ Syphilis in children, since it is essentially late syphilis, may produce gummatous changes of the most disfiguring type, fully as extreme as those in acquired syphilis and resulting in the destruction or injury of important organs, and the loss of parts of bones, especially about the mouth and nose.
In the later stages of acquired syphilis, gummatous periostitis and osteomyelitis occur, and are characterised by the formation in the periosteum and marrow of circumscribed gummata or of a diffuse gummatous infiltration. The framework of the bone is rarefied in the area immediately involved, and sclerosed in the parts beyond.
When the gummatous tissue is first exposed by the destruction of the skin or mucous membrane covering it, it appears as a tough greyish slough, compared to "wash leather," which slowly separates and leaves a more or less circular, deep, punched-out gap which shows a few feeble unhealthy granulations and small sloughs on its floor.
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