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Biomedical subjects

N L Chazova

Publications and source records attributed to N L Chazova.

16 recordsLinked to original sources
PubMed1990

[Aponeurotic fibromatosis with calcification].

Clinico-morphological description of one case of aponeurotic fibromatosis with calcification in a 59-year-old man. Fibromatosis was localized in the proximal part of the limb and had a nodular appearance. Histologically, roundish and oval cells with "swollen" nuclei forming a sort of parallel rows, foci of calcification and chondroid metaplasia characteristic for such cases were found.

Biopsy, Needle↗
PubMed1989

[Morphology and histogenesis of paraganglioma].

Histological and ultrastructural studies were performed to examine 6 paragangliomas of various sites: carotid glomus, aortic body, sympathetic chain, and stomach. Five of the tumors in question had a histological structure typical of a paraganglioma. The gastric tumor was distinguished by being similar to a pheochromocytoma. With regard to the degree of infiltrative growth, the paragangliomas of the sympathetic chain and stomach were regarded as malignant. The ultrastructures of the paragangliomas examined were found to be of the same type. In all the neoplasms, tumor cells had signs of neuroendocrine and neurogenous differentiations that were characteristic of the ultrastructural organization of postganglionic neurons in the autonomic nervous system. The neurogenous differentiation was evidenced by cytoplasmic portions that are structurally similar to rough-surface endoplasmic reticulum, which is pertaining to Nissl's bodies; neurofilaments that form concentric structures containing neuroendocrine granules such as fibrous or Pick's bodies; intracytoplasmic cilia; specialized cytoplasmic processes of two types: axons and dendrites; partially reduced intercellular contacts, such as axosomatic and axodendritic synapses; sustentacular cells (sustenocytes). In the neoplasms evaluated as malignant, the neurogenous differential signs were more pronounced by reducing the number of neurosecretory granules, which might, apparently, serve as an ultrastructural criterion for establishing the degree of paraganglioma malignancy.

Adult↗
PubMed1988

[Chondroid syringoma (borderline type)].

An overall morphologic evaluation of a case of facial skin chondroid syringoma (CS) provided evidence for CS classification as borderline. Histologically, CS showed signs of cellular elements polymorphism, contained structures typical for CS whereas electron-microscopically there were two types of cells: epithelial and myoepithelial.

Adenoma, Sweat Gland↗
PubMedDate not supplied

[Eccrine spiradenoma].

Benign epithelial tumor of the skin--eccrine spiradenoma--is characterized in detail clinically and morphologically.

Adenoma, Sweat Gland↗
PubMedDate not supplied

[Endovascular papillary angioendothelioma].

One case of a rare vascular tumor which occurs mainly in the childhood is presented. The tumor has a tendency to recurrence and metastases into the regional lymph nodes in spite of a relatively mature structure.

Hemangioendothelioma↗
PubMedDate not supplied

[Osteochondroplastic tracheobronchopathy].

14 cases of osteochondroplastic tracheobronchopathy (OT) are studied histologically. The disease is characterized by formation of cartilage and bone tissue in the submucosa of the trachea and bronchi outside their own cartilagenous carcass. Its histogenesis is not clear and is attributed to chronic bronchitis, specific inflammation, dysembryogenetic alterations, endocrine disorders, environmental and occupational hazards, amyloidosis of the trachea. The process is localized in the trachea and bronchi as an isolated and rarely as a diffuse lesion. Morphologically, normal or atrophic mucous membrane is observed, at some places with a squamous metaplasia. Areas of cartilage with calcium deposits and foci of bone having a trabecular structure with formation of spongious bone tissue, sometimes with bone marrow, were found.

Adult↗
PubMedDate not supplied

[Carcinoid of the kidney].

Rare location of carcinoid tumour in the kidney is reported. The diagnosis was established on the basis of histological and ultrastructural investigation.

Carcinoid Tumor↗
PubMedDate not supplied

[Carcinoid tumors of the lung].

Detailed cytological, histological and electron microscopic characteristics of pulmonary carcinoid tumors are listed on the basis of surgical clinic material. Various variants of the carcinoid tumors structure, their differential diagnosis are presented.

Adenocarcinoma, Clear Cell↗
PubMedDate not supplied

[Controversial aspects of verification and classification of thyroid tumors].

20-year experience in the intraoperative study of more than 3000 goiters led the authors to the conclusion that the most correct verification of the pathologic process may be performed only by means of intraoperative stereomorphological and histotopographic examination of the biopsy. In case of nodular hyperplasia of follicular and macropapillary structures the most adequate term is adenomatous goiter. The term borderline thyroid tumor is also suggested although it needs further discussion by both clinicians and morphologists.

Biopsy↗
PubMedDate not supplied

[Cystic epithelioma in the epidermal cyst].

A case of skin tumor-cystic epithelioma is reported. Differential-diagnostic features of its distinction from squamous-cell carcinoma are given.

Carcinoma, Squamous Cell↗
PubMedDate not supplied

[Elastofibroma].

Explore the source record for details and available documents.

Fibroma↗