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Results for “SEMILUNAR CARTILAGES”

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At least 19 recordsLinked to original sources
PubMed1978

A maturation change detected in the semilunar cartilages with the scanning electron microscope.

The surface of rabbit, cat, monkey and human semilunar cartilages was examined with the scanning electron microscope. A common feature was the occurrence of numerous ridges, undulations and furrows on the surface, but this was thought to be due to marked shrinkage and distortion of cartilage not firmly attached to bone. Humps were seen on the semilunar cartilages of young animals, but pits occurred in adults. This is thought to reflect a maturation change. Humps were seen in a young human semilunar cartilage, but pits were not seen in adult specimens. It is not clear whether pits are truly absent or just masked by the severe ridging produced during the preparation of large human specimens.

Aging↗
PubMed1980

Thickening of the nuclear fibrous lamina in injured human semilunar cartilages.

A morphometric study was carried out to assess the thickness of the fibrous lamina in the nuclei of cells adjacent to tears in semilunar cartilages and in cells from relatively normal uninjured parts of semilunar cartilages. Comparisons of mean thickness of the lamina showed a statistically significant thickening of the lamina at the site of injury. This observation supports the growing body of evidence indicating that the fibrous lamina is not a static structure of fixed dimensions for a given cell type but a dynamic structure whose thickness varies as a result of altered physiological or pathological states.

Cell Nucleus↗
PubMed1977

[Injury of the semilunar cartilages of the knee-joint in childhood (author's transl)].

In the paper, 30 patients at the age of 5 till 14 with injuries of the semilunar cartilages of the knee-joint, are presented. All the children were subjected to surgery, and 20 of them underwent same examinations performed in a delay of 1 to 12 years after they had been operated. Both etiology and the injury mechanism subjects are hadled together with the clinical pictures, specific to the age of the young patients. Basing of the clinical and X-ray examinations, the state of the morphological and functional condition of the knee of a child after semilunar cartilage had been removed, was considered and estimated.

Adolescent↗
PubMed1976

Cysts of the semilunar cartilage of the knee. A light and electron microscopic study.

The semilunar cartilages of the knee of six cases showing various degrees of mucoid degeneration with cyst formation were studied with the light microscope. Three cases were selected for electron microscopic observation which revealed that some of the cystic spaces filled with mucoid material were lined by synovial cells. Masses of mucinous, alcian bluc positive material (acid mucopolysaccharides) were observed also among degenerated and intact bundles of collagen. It is concluded that the accumulation of acid mucopolysaccharides in meniscial cysts is at least in part a product of secretion of synovial cells. This observation explains the high incidence of recurrence of meniscial cysts after incomplete surgical excision and supports the concept that it is an active rather than a degenerative process.

Collagen↗
PubMed1978

Ultrastructure of rabbit semilunar cartilages.

A light and transmission electron microscopical study of 6 to 8 months old rabbit semilunar cartilages has shown that the cells in this tissue resemble chondrocytes more than fibroblasts. The prominent organelles in these cells were rough endoplasmic reticulum and the Golgi complex. An unusual finding was the occurrence of filamentous material in Golgi sacs and vesicles, and collagen fibrils within smooth membrane-bound tubular structures, apparently within the cells. Collagen fibrils forming fibres, fibre bundles and lamellae constituted the major component of the menisci. Protein-polysaccharide particles and associated fine filaments were found in the interfibrillary matrix and in the sparse territorial matrix adjacent to the chondrocytes. Numerous immature elastic fibrils, and rare mature elastic fibres with an electorn-lucent amorphous core, were also found in the general matrix amongst the collagen fibrils.

Animals↗
PubMed1981

Intramatrical lipidic debris and calcified bodies in human semilunar cartilages.

Intramatrical lipid debris and calcified bodies were found in the matrix of injured and uninjured portions of semilunar cartilages obtained from patients ranging in age from 16 to 60 years. Most of the calcified bodies were homogeneously electron-dense and they were roughly spherical or cuboidal in shape. Much rarer was the occurrence of calcified bodies containing long, slender crystals. Electron-probe X-ray analysis showed that the homogeneously electron-dense bodies contain phosphorus, calcium and magnesium.

Adolescent↗
PubMed1990

Cysts of the semilunar cartilages of the knee: a new approach by ultrasound imaging. A study of six cases and review of the literature.

The authors present six cases of cysts of the semilunar cartilages of the knee detected by ultrasonography, all of them confirmed at the time of surgery. Five of these lesions were cysts of the lateral meniscus; one lesion was a cyst of the medial meniscus. Because of ultrasonography, an accurate diagnosis of meniscal cysts is within the reach of the radiologist; it is also possible to visualize the extension of these lesions in a correct way, thereby being of great help to orthopedic surgeons. The main advantages of this technique compared with magnetic resonance imaging (MRI), which is also able to give the same information, are the short time required to perform the examination and the low costs. After outlining their study, the authors give a review of the literature concerning the incidence, clinical features, pathogenesis, and management of the disease.

Cartilage Diseases↗