Репозиторий Университета

© 2020 Purpose: To evaluate the density and distribution of conjunctival goblet cells in mice without clinical evidence of ocular surface diseases. Methods: Immediately after euthanasia of C57BL/6 wild-type mice, the eyes including eyelids were removed and fixed in paraformaldehyde. Entire eyeballs and eyelids were cut in series along the sagittal axis from nasal to temporal on a microtome and then stained with Periodic Acid-Schiff acid to visualize the goblet cells. At each section stained in this way, the conjunctival goblet cells of the entire upper and lower lid conjunctiva were counted by light microscopy. Additional (transmission electron microscopy) (TEM)-Analysis on ultrathin sections was performed to evaluate morphological differences. Results: The total number of conjunctival goblet cells differs markedly between individual animals. Categorisation into upper eyelid (UL) and lower eyelid (LL) and into regions (nasal, middle, temporal) revealed a significant increase of goblet cells from nasal to temporal in the UL and a significant decrease in the LL. Conclusion: The distribution of conjunctival goblet cells in mice differs considerably from humans and between individual animals. Therefore, precise selection of sampling and methods are needed to obtain comparable data. We recommend to use the middle region of the conjunctiva of UL/LL for goblet cell studies in mice. These findings are of particular interest for dry eye mouse models as well as pharmacological studies on mice with influence on their goblet cells.

Scleromyxedema is regarded as a rare cutaneous mucinosis from a group of lichen myxedematosus characterized by diffuse mucin deposition, sclerosis, and lichenoid eruptions in the absence of thyroid disease. The paper discusses the pathogenesis of the disease and histological changes in tissues. It underlines the need for using histochemical tests to identify acidic and neutral glycosaminoglycans and gives a differential diagnosis of this disease.

© Bionika Media Ltd. Background. Ovarian cancer develops from benign tumors in 80% of cases during long-term follow-up. According to the literature, the incidence of giant ovarian cystadenoma is extremely low. There are difficulties in verifying these ovarian tumors. Description. The paper describes a rare clinical case of a 54-year-old patient with giant ovarian cystadenoma. It depicts the patient’s clinical, medical history, laboratory, and instrumental data and demonstrates the technical complexities of surgery and the features of postoperative management. Conclusion. The early diagnosis and timely treatment of ovarian tumors will be able to avoid technically difficult surgical interventions and to minimize postoperative complications, which will substantially improve the prognosis of the disease. Such operations should be performed by a surgeon having extensive surgical experience and high qualification.

© Bionika Media Ltd. Endometriosis affects up to 15% of reproductive-aged women. Consideration of this nosological entity in a new aspect is impelled by the evidence that 0.5–1% of cases develops endometriosis-associated ovarian neoplasms that are more represented by the endometrioid and clear-cell subtypes of tumors. This category also includes seromucinous ovarian tumors (SMOTs). Objective. To investigate the morphological and immunohistochemical (IHC) features of SMOTs in reproductiveaged women, including pregnant ones. Subjects and methods. Ovarian tumor samples from 15 patients who had been operated on in 2012-2016 were analyzed comprehensively at the National Medical Research Center of Obstetrics, Gynecology, and Perinatology: IHC examination was conducted using the biomarkers of estrogen and progesterone receptors and Ki-67. Results. Borderline SMOTs were characterized by papillary growths on the inner surface (in one case) and on the outer surface, with an adhesive process with the serous surface of the corpus uteri (FIGO Stage 1c), and mixed epithelial structures; leukocyte infiltration was observed in 4 cases. The epithelium of seromucinous carcinoma (n = 1) was similar to that of serous, endocervical, and endometrial types at the same time. All the samples exhibited a low Ki-67 expression and high positive receptor immunoreactivity. Endometriosis diagnosed in nine women was accompanied by benign seromucinous cystadenomas (n = 4), borderline tumors (n = 4), and carcinoma (n = 1). Conclusion. Most of the examined SMOTs showed the areas, covered with the endometrioid epithelium, with adjacent endometrial stroma, which indicated the development of carcinoma in the presence of endometrioid cyst. The revealed facts suggest that endometriosis plays an etiological role in developing SMOTs. When detected, most neoplasms are localized (limited to ovarian tissue, FIGO stage 1a) and characterized by a favorable prognosis as a whole.

© 2018 Media Sphera Publishing Group. All rights reserved. Scleromyxedema is a rare mucinosis with a primary skin lesion due to diffuse mucin deposition, sclerosis, and lichenoid eruptions in the absence of hypothyroidism. The paper describes scleromyxedema cases and gives recommendations for the histological diagnosis of the disease by histochemical reactions to detect acid and neutral glycosaminoglycans.