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Sclerosis (from Ancient Greek σκληρός (sklērós) 'hard') is the stiffening of a tissue or anatomical feature, usually caused by a replacement of the normal organ-specific tissue with connective tissue. The structure may be said to have undergone sclerotic changes or display sclerotic lesions, which refers to the process of sclerosis.
Osteosclerosis is a disorder characterized by abnormal hardening of bone and an elevation in bone density. It may predominantly affect the medullary portion and/or cortex of bone.
Idiopathic osteosclerosis, also known as enostosis or dense bone island, is a condition which may be found around the roots of a tooth, usually a premolar or molar. [2] It is usually painless and found during routine radiographs as an amorphous radiopaque (light) area around a tooth.
Tumefactive Multiple sclerosis: lesions whose size is more than 2 cm, with mass effect, oedema and/or ring enhancement [9] [10] AntiMOG associated encephalomyelitis: Lesions similar to ADEM sometimes and to NMO some others. It is not normal, but can also appear like MS even with biopsy. These cases resemble MS pattern-II lesions. [11]
Drawing of sclerotic lesions from Babinski's thesis "Etude anatomique et clinique de la sclérose en plaques", 1885. Multiple sclerosis (MS) can be pathologically defined as the presence of distributed glial scars in the central nervous system that must show dissemination in time (DIT) and in space (DIS) to be considered MS lesions.
Sclerosis (also sclerosus in the Latin names of a few disorders) is a hardening of tissue and other anatomical features. It may refer to: Sclerosis (medicine), a hardening of tissue; in zoology, a process which forms sclerites, a hardened exoskeleton; in botany, a process which hardens plant tissue by adding fibers and sclereids, resulting in ...
Multiple sclerosis with cavitary lesions: Atypical multiple sclerosis cases similar to vanishing white matter disease but etiologically different from both. [77] Lesions similar to vanishing white matter disease [77] Leukodystrophy-like MS. Other radiological classification of atypical lesions proposes the following four subtypes: [78] infiltrative
Radiographs in osteoid osteoma typically show a round lucency, containing a dense sclerotic central nidus (the characteristic lesion in this kind of tumor) surrounded by sclerotic bone. The nidus is seldom larger than 1.5 cm. [citation needed] The lesion can in most cases be detected on CT scan, bone scans and angiograms.