Search results for "biopsy"
showing 10 items of 1352 documents
Retrospective analysis of jaw biopsies in young adults. A study of 1599 cases in Southern Brazil
2017
Background To evaluate the prevalence and the characteristics of jaw lesions diagnosed in young adults aged 20 to 30 years in a southern Brazil reference center, over a period of 25 years. And to analyze the concordance between clinical and histological diagnosis. Material and Methods In this cross-sectional retrospective study, the biopsies files from this center were retrieved and data regarding sex, age, bone localization, clinical and histological diagnosis were collected. The histological diagnosis were grouped into the categories Cystic lesions of odontogenic origin, Periapical inflammation, Odontogenic tumors, Bone diseases, Health tissue and Nonspecific diagnostic. Absolute and rela…
Focal myositis of the temporal muscle
1993
Focal myositis is a rare inflammatory disease of the skeletal muscle that may involve any part of the body. We present a 19-year-old man with a short history of a painful pseudotumor in the right temporal region. MRI pictures showed a swollen right temporal muscle and muscle biopsy revealed the characteristic histological and immunocytochemical findings of polymyositis.
Tuberculoid leprosy and Type 1 lepra reaction.
2008
Summary A patient is described with tuberculoid leprosy and Type 1 (lepra) reaction from Sicily a non-endemic region, who lived previously in Manila from 2000 to 2005. The skin lesions became acutely inflamed and edematous. The plaques were painless to touch or pinprick, and there was swelling of the nerves in the fibro-osseous tunnels under the surface of the skin, including both the ulnar nerve at the elbow, and the posterior tibial nerve (medial malleolus). During the course of electro-neurographic studies, conduction velocity in the motory nerves indicated a slowing-down. The diagnosis of leprosy was confirmed by residence in an endemic area for about 5 years, by simultaneous skin lesio…
A mitochondrial antigen-antibody system in cholestatic liver disease detected by radioimmunoassay.
2007
A radioimmunoassay (RIA) was established for the detection of antimitochondrial autoantibodies (AMAs) in patient sera. AMAs were detected by RIA in 12 of 14 patients with primary biliary cirrhosis and in 3 of 29 patients with chronic active hepatitis. AMAs were detected by indirect immunofluorescence in all sera positive by RIA. In addition, two patients with primary biliary cirrhosis and one patient with chronic active hepatitis were AMA positive when tested by indirect immunofluorescence, but negative when tested by RIA. AMAs were not detected by RIA or indirect immunofluorescence in 121 further patients with various hepatic and nonhepatic diseases, including healthy controls. The RIA det…
Malignant paraganglioma caused by a novel germline mutation of the succinate dehydrogenase D-gene--a case report.
2008
Background Paragangliomas of the head and neck are rare, mostly benign tumors. Approximately 10% to 15% of paragangliomas are caused by mutations in the succinate dehydrogenase (SDH) genes B, C, or D. These are often multifocal as part of paraganglioma syndromes and hormone secreting, and malignant particularly associated with mutations in SDHB. Methods and Results A 29-year-old man was seen with recurrent paraganglioma. The patient's father reportedly suffered from bilateral carotid body tumors. Imaging studies showed metastases in both lungs and the liver. There was no increased hormone production by the tumor. Sequence analysis of the SDH genes revealed a novel C to T nonsense mutation i…
Desmoplastic primitive nonneural granular cell tumor of the skin.
2014
Abstract Primitive nonneural granular cell tumor of the skin was first described by LeBoit et al in 1991 as "primitive polypoid granular cell tumor." Few cases have been reported to date, all being polypoid or deep well-delimited lesions and formed by large spindle or polygonal granular cells with moderate nuclear atypia and increased mitotic activity. This granular cell population does not have a Schwannian, myogenic, melanocytic, fibroblastic, histiocytic, or epithelial differentiation. We report a case that fully satisfies the criteria for primitive nonneural granular cell tumor of the skin and, in addition, shows an extensive desmoplastic stroma. This desmoplastic variant of primitive n…
Cutaneous dermal non-neural granular cell tumor is a granular cell dermal root sheath fibroma
2017
Dermal non-neural granular cell tumor (NNGCT) was first described in 1991 as an S100-negative polypoid non-melanocytic tumor. Although originally introduced in the literature as a primary cutaneous tumor, it was later emphasized that such qualification could not be held until the line of differentiation was clarified. It was also demonstrated that not all cases were polypoid. In the current study we try to further characterize this entity by presenting 5 cases of NNGCT. As expected, not all of them were polypoid. The ages of the patients varied from 10 to 43 (mean age 22). They all were composed of S100-negative granular cells with variable atypia and mitotic figures. None of them recurred …
Minilaparoscopy-guided spleen biopsy in systemic disease with splenomegaly of unknown origin.
2002
With the advent of a minimally invasive laparoscopy technique, the advantages of diagnostic laparoscopy are being rediscovered. We report here on four patients with systemic disease of unknown origin and splenomegaly, in whom minilaparoscopy-guided splenic biopsy yielded a definitive diagnosis. Four patients with unclear systemic disease were studied using diagnostic minilaparoscopy and guided spleen biopsy, after failure of diagnostic work-up. Minilaparoscopic spleen biopsy revealed the diagnosis of a B-cell non-Hodgkin's lymphoma in two cases. In one patient, who had a history of Still's disease, the spleen biopsy showed granulocytic infiltration in the spleen typical of an acute episode …
Immune-mediated necrotizing myopathy is characterized by a specific Th1-M1 polarized immune profile.
2012
Immune-mediated necrotizing myopathy (IMNM) is considered one of the idiopathic inflammatory myopathies, comprising dermatomyositis, polymyositis, and inclusion body myositis. The heterogeneous group of necrotizing myopathies shows a varying amount of necrotic muscle fibers, myophagocytosis, and a sparse inflammatory infiltrate. The underlying immune response in necrotizing myopathy has not yet been addressed in detail. Affected muscle tissue, obtained from 16 patients with IMNM, was analyzed compared with eight non-IMNM (nIMNM) tissues. Inflammatory cells were characterized by IHC, and immune mediators were assessed by quantitative real-time PCR. We demonstrate that immune- and non–immune-…
Clinical and histological features of gingival lesions: A 17-year retrospective analysis in a northern Italian population
2012
Objectives: Only few studies on gingival lesions considered large enough populations and contemporary literature does not provide a valid report regarding the epidemiology of gingival lesions within the Italian population. The histopathological and clinical appearance of 538 gingival lesions from northern Italians are described and discussed here. Study Design: The case records of patients referred for the diagnosis and management of gingival lesions, from October 1993 to October 2009, were reviewed. Data regarding the histological type of lesion were also obtained from the biopsy register for each case, and blindly re-examined. Results: We reported a greater frequency of benign lesions (re…