Search results for "eosin"
showing 10 items of 275 documents
Langerhans cell histiocytosis: Current concepts in dentistry and case report
2016
Langerhans cell histiocytosis (LCH), which is a rare granulomatous pediatric disease of unknown etiology, is characterized by the idiopathic proliferation and accumulation of abnormal and clonal Langerhans cells or their marrow precursors, resulting in localized, solitary or multiple destructive lesions. These lesions are most commonly eosinophilic granuloma, which are found in craniofacial bone structures such as the skull and mandible, skin and other organs. In children, the disease has a variable initial presentation, and the clinical course, prognosis and survival are unpredictable. The aims of this report were to present an LCH case in a girl aged 2 years, 8 months and her clinicopatho…
Microarchitecture of the Normal Gut Seen with Conventional Histology and Endomicroscopy
2007
For ex vivo histological examination of the gastrointestinal tract, fractions of an organ or small pieces of tissue are needed. Several steps are used in the fixation, staining, and mounting process to ensure production of good-quality histology on glass slides. The most frequently used stain in routine histology is the haematoxylin and eosin (H&E) stain. The most frequently used tissue-staining methods are shown in ⊡ Table 6.1. The final histopathological diagnosis is always based on examination of the whole sample and the structure and architecture of that sample. In cytology, single cells and nuclei are used for making a diagnosis, so staining procedures in cytology are much faster and e…
Toxicity test of a dental commercial composite in rats.
2011
Objective: The aim of this study was to determine the 90-day subchronic toxicity of one triethylene glycol dimethacrylate containing composite (MEDENTAL Light-Cure Composite™) orally administered to rats according to OECD no. 48 guidelines and the requirements specified in the International Organization for Standardization 10993-11. Study design: The composite was administered orally to Wistar rats during 90 days and they were observed to determine changes in their behavior, eye and skin signs and other attitudes such as aggressiveness, posture, walking and response to handling. After 90 days they were sacrificed to determine blood alterations, special hematological tests were done and hist…
Peripheral T-cell lymphoma associated consecutively with hemophagocytic lymphohistiocytosis and hypereosinophilic syndrome
2003
: Both hemophagocytic lymphohistiocytosis and hypereosinophilic syndrome have been associated with hematologic neoplasms and are respectively related to an overproduction of the cytokines Thelper 1 (Th1) and Th2 by tumor cells or reactive cells. To our knowledge, this is the first time a case of a peripheral T-cell lymphoma consecutively associated with both paraneoplastic conditions has been reported. Importantly, in this case when the lymphoma exclusively involved the bone marrow, severe paraneoplastic systemic damage, a CD8+ suppressor/cytotoxic phenotype and a hypereosinophilia not related to high levels of interleukin (IL)-5 was found. Interestingly, progression of the lymphoma coinci…
Myopathology of non-infectious inflammatory myopathies - the current status.
2007
Besides the classical inflammatory myopathies (IM), dermatomyositis (DM), polymyositis, and inclusion body myositis, the much larger spectrum of IM includes focal and nodular myositis, granulomatous myositis, macrophagic myofasciitis, graft vs. host myositis, eosinophilic myositis, and other immune-associated conditions, some of them only recently described. In addition, paraneoplastic, statin-induced and critical illness myopathies have been considered immune-associated IM. Infectious, i.e., bacterial, viral, and parasitic IM are much less frequent in the northern hemisphere. In IM, muscle biopsy is an essential diagnostic procedure to initiate therapy. The myopathological spectrum encompa…
Inmunohistochemical detection of mastocytes in tissue from patients with actinic prurigo
2015
Background: Actinic prurigo (AP) is a type of photodermatosis, the pathophysiology of which has not been determined. AP has been suggested to be a hypersensitivity reaction to the presence of eosinophils and the local production of IgE. Material and Methods: Descriptive study, using paraffin blocks of tissue that have been diagnosed with AP from the Dermopathology department, Hospital General Dr. Manuel Gea González. In 66 blocks from 63 patients, eosinophils were identified by hematoxylin and eosin staining, and mastocytes were labeled by immunohistochemistry. Three random microphotographs (40x) were used, and cell counts were calculated as the mean count in the 3 microphotographs. Results…
Focal palmoplantar and gingival keratosis ? A rare genodermatoses : case report
2020
Focal palmoplantar and gingival keratosis syndrome is a rare dominant inherited disease with an early onset in life. Clinically, the condition is characterized by pressure related thickening of the epidermis of the palms and soles, usually accompanied by pain and different levels of skin involvement and thickness between patients. Recently, we observed a 38-year-old woman with multiple non-removable, painless white plaques of variable size and thickness on the attached gingiva and a white plaque widespread across the hard palate. By further questioning, the patient comments that she has thick yellowish focal plaques in both soles of her feet. Histopathological analysis revealed a hyperplast…
Granular cell ameloblastoma of jaw: report of a case with an emphasis on its characterization
2013
Ameloblastoma is a neoplasm of odontogenic epithelium, especially of enamel organ-type tissue that has not undergone differentiation to the point of hard tissue formation. It accounts for approximately 10% of all tumors originating from gnathic bones. It exhibits diverse microscopic patterns which occurs either singly or in combination with other patterns. Granular cell ameloblastoma is a rare condition, accounting for 3.5% of all ameloblastoma cases that shows marked transformation in the cytoplasm of tumor cells, which are usually stellate reticulum like cells. The transformed cells possess very coarse, granular, eosinophilic cytoplasm. The “granular change” is thought to be due to a dysf…
Direct and indirect affection of the central nervous system by Fasciola infection
2013
Fascioliasis is a worldwide, zoonotic disease caused by the liver trematodes Fasciola hepatica and Fasciola gigantica. Neurological fascioliasis has been widely reported in all continents, affecting both sexes and all ages. Two types of records related to two physiopathogenic mechanisms may be distinguished: cases in which the neurological symptoms are due to direct effects of a migrating juvenile present in the brain or neighboring organ and with cerebral lesions suggesting migration through the brain; and cases with neurological symptoms due to indirect immuno-allergic and toxic effects at distance from flukes in the liver. Neurological manifestations include minor symptoms, mainly cephal…
Zur Leberbeteiligung bei der knotenf�rmigen reticul�ren eosinophilen Hyperplasie
1977
Beschreibung und Diskussion eines eosinophil akzentuierten Leberbefundes bei einer Patientin mit endogenem Ekzem und einer eosinophilen reticularen Hyperplasie (mit Bluteosinophilie), die hauterscheinungsbildlich dem Morbus Kimura nahekommt. Mithin scheinen im Gegensatz zu der bisherigen Meinung Innenorganbeteiligungen im Rahmen der reticularen Haut-Hyperplasie durchaus moglich.