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Multinucleated giant cells

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https://www.readbyqxmd.com/read/29166509/granulomatous-slack-skin-a-rare-subtype-of-mycosis-fungoides
#1
Letícia Marra da Motta, Cleverson Teixeira Soares, Sadamitsu Nakandakari, Gardênia Viana da Silva, Maria Helena Mazzi Freire Nigro, Leticia Stella Gardini Brandão
We report a case of granulomatous slack skin, a rare and indolent subtype of mycosis fungoides. It affects mainly men between the third and fourth decades. It is characterized by hardened and erithematous plaques that mainly affect flexural areas and become pedunculated after some years. Histological examination shows a dense infiltrate of small atypical lymphocytes involving the dermis (and sometimes the subcutaneous tissue) associated with histiocytic and multinucleated giant cells containing lymphocytes and elastic fibers (lymphophagocytosis and elastophagocytosis, respectively)...
September 2017: Anais Brasileiros de Dermatologia
https://www.readbyqxmd.com/read/29164473/clinicopathological-and-immunohistochemical-study-of-head-and-neck-langerhans-cell-histiocytosis-from-latin-america
#2
Natália Rocha Bedran, Román Carlos, Bruno Augusto Benevenuto de Andrade, Ana Paula Silva Bueno, Mário José Romañach, Cristiane Bedran Milito
Langerhans cell histiocytosis (LCH) is an inflammatory myeloid neoplastic proliferation with variable clinical behavior caused by the accumulation of CD1a(+)/CD207(+) histiocytes, associated with a variable number of eosinophils, lymphocytes, plasma cells and multinucleated giant cells, most commonly observed in male children. LCH is uncommon in the head and neck region, occurring as ulcerated and reddened plaques or nodules that cause destruction of adjacent soft tissues and bone. The exact etiology of LCH is still unknown and controversial, with possible etiologic role of viruses, including Epstein-Barr virus (EBV)...
November 21, 2017: Head and Neck Pathology
https://www.readbyqxmd.com/read/29156538/combined-effects-of-simulated-microgravity-and-radiation-exposure-on-osteoclast-cell-fusion
#3
Srinivasan Shanmugarajan, Ye Zhang, Maria Moreno-Villanueva, Ryan Clanton, Larry H Rohde, Govindarajan T Ramesh, Jean D Sibonga, Honglu Wu
The loss of bone mass and alteration in bone physiology during space flight are one of the major health risks for astronauts. Although the lack of weight bearing in microgravity is considered a risk factor for bone loss and possible osteoporosis, organisms living in space are also exposed to cosmic radiation and other environmental stress factors. As such, it is still unclear as to whether and by how much radiation exposure contributes to bone loss during space travel, and whether the effects of microgravity and radiation exposure are additive or synergistic...
November 18, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29138945/glioblastoma-in-neurofibromatosis-1-patients-without-idh1-braf-v600e-and-tert-promoter-mutations
#4
Ichiyo Shibahara, Yukihiko Sonoda, Hiroyoshi Suzuki, Akifumi Mayama, Masayuki Kanamori, Ryuta Saito, Yasuhiro Suzuki, Shoji Mashiyama, Hiroshi Uenohara, Mika Watanabe, Toshihiro Kumabe, Teiji Tominaga
Pilocytic astrocytomas and low-grade gliomas are more common compared with glioblastomas in patients with neurofibromatosis 1 (NF1). A recent genome-wide analysis has shown frequent NF1 gene alterations in the mesenchymal subtype of a glioblastoma; however, little is known about clinicopathological features of glioblastomas in NF1 patients (NF1 glioblastomas). We analyzed four NF1 glioblastomas. Radiographical and intraoperative findings showed well-circumscribed tumors from surrounding brain. Pathological analysis presented a paucity of processes with an eosinophilic cytoplasm, bizarre nuclei, xanthomatous-like appearance, multinucleated giant cells, and histiocytoid appearance...
November 14, 2017: Brain Tumor Pathology
https://www.readbyqxmd.com/read/29135510/mycosis-fungoides-manifesting-as-giant-cell-lichenoid-dermatitis
#5
Irena E Belousova, Vladislav R Khairutdinov, Anna Bessalova, Dmitry V Kazakov
Mycosis fungoides (MF) is the most common form of primary cutaneous lymphoma with a broad clinicopathological spectrum. Unusual histopathologic patterns of MF include lichenoid, interstitial, folliculotropic, spongiotic, granulomatous, and many others. Several cases of unusual lichenoid reaction characterized by a mixed lichenoid inflammatory infiltrate with prominent infiltration of the papillary dermis and epidermis by multinucleated giant cells were described under the name of "giant cell lichenoid dermatitis," most of them were considered to represent a drug eruption...
November 10, 2017: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/29097394/mycobacteria-exploit-nitric-oxide-induced-transformation-of-macrophages-into-permissive-giant-cells
#6
Kourosh Gharun, Julia Senges, Maximilian Seidl, Anne Lösslein, Julia Kolter, Florens Lohrmann, Manfred Fliegauf, Magdeldin Elgizouli, Martina Vavra, Kristina Schachtrup, Anna L Illert, Martine Gilleron, Carsten J Kirschning, Antigoni Triantafyllopoulou, Philipp Henneke
Immunity to mycobacteria involves the formation of granulomas, characterized by a unique macrophage (MΦ) species, so-called multinucleated giant cells (MGC). It remains unresolved whether MGC are beneficial to the host, that is, by prevention of bacterial spread, or whether they promote mycobacterial persistence. Here, we show that the prototypical antimycobacterial molecule nitric oxide (NO), which is produced by MGC in excessive amounts, is a double-edged sword. Next to its antibacterial capacity, NO propagates the transformation of MΦ into MGC, which are relatively permissive for mycobacterial persistence...
November 2, 2017: EMBO Reports
https://www.readbyqxmd.com/read/29096596/comparison-of-the-local-tolerability-to-5-long-acting-drug-nanosuspensions-with-different-stabilizing-excipients-following-a-single-intramuscular-administration-in-the-rat
#7
Ronnie Chamanza, Nicolas Darville, Marjolein van Heerden, Sandra De Jonghe
To investigate the effects of common nanosuspension-stabilizing excipients on the nature and temporal evolution of histopathological changes at intramuscular (i.m.) administration sites, 5 groups of 39 male rats per group received a single injection of 1 of the 5 analogous crystalline drug nanosuspensions containing 200 mg/ml of an antiviral compound with particle sizes of ±200 nm and identical vehicle compositions, except for the type of nanosuspension stabilizer. The investigated stabilizers were poloxamer 338, poloxamer 407, d-α-tocopherol polyethylene glycol 1,000-succinate (TPGS), polysorbate 80, and polysorbate 80 combined with egg phosphatidylglycerol...
January 1, 2017: Toxicologic Pathology
https://www.readbyqxmd.com/read/29091110/evaluation-in-vivo-of-biocompatibility-of-differents-resin-modified-cements-for-bonding-orthodontic-bands
#8
Janaina A Mesquita, Rogério Lacerda-Santos, Gêisa A M Sampaio, Gustavo P Godoy, Cassiano F W Nonaka, Pollianna M Alves
The focus of this study was to test the hypothesis that there would be no difference between the biocompatibility of resin-modified glass ionomer cements. Sixty male Wistar rats were selected and divided into four groups: Control Group; Crosslink Group; RMO Group and Transbond Group. The materials were inserted into rat subcutaneous tissue. After time intervals of 7, 15 and 30 days morphological analyses were performed. The histological parameters assessed were: inflammatory infiltrate intensity; reaction of multinucleated giant cells; edema; necrosis; granulation reaction; young fibroblasts and collagenization...
October 26, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/29091020/do-clinical-and-radiological-assessments-contribute-to-the-understanding-of-biomaterials-results-from-a-prospective-randomized-sinus-augmentation-split-mouth-trial
#9
Jonas Lorenz, Tadas Korzinskas, Poju Chia, Sarah Al Maawi, Katrin Eichler, Robert Sader, Shahram Ghanaati
The present prospective randomized split-mouth trial reports on the 3-year clinical and radiological follow-up investigation of implants placed 7 months after sinus augmentation with two different bone substitute materials. Aim of the study was to complete the histologic observation of the cellular reactions by analysis of the implants and the volumetric changes of the augmented bone substitute materials. A sinus augmentation split-mouth trial was performed in 14 patients with the synthetic bone substitute material Nanobone® (NB) and the xenogeneic Bio-Oss® (BO)...
November 1, 2017: Journal of Oral Implantology
https://www.readbyqxmd.com/read/29070744/glycyrrhizin-inhibits-human-parainfluenza-virus-type-2-replication-by-the-inhibition-of-genome-rna-mrna-and-protein-syntheses
#10
Kae Sakai-Sugino, Jun Uematsu, Miyuki Kamada, Hiroe Taniguchi, Saori Suzuki, Yumiko Yoshimi, Sahoko Kihira, Hidetaka Yamamoto, Mitsuo Kawano, Masato Tsurudome, Myles O'Brien, Makoto Itoh, Hiroshi Komada
The effect of glycyrrhizin on the replication of human parainfluenza virus type 2 (hPIV-2) was examined. Cell fusion induced by hPIV-2 was inhibited by glycyrrhizin, and glycyrrhizin reduced the number of viruses released from the cells. Glycyrrhizin did not change cell morphology at 1 day of culture, but caused some damage at 4 days, as determined by the effect on actin microfilaments. However, it affected the cell viability at 1 day: about 20% of the cells were not alive by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay at 1 day of culture...
October 24, 2017: Drug Discoveries & Therapeutics
https://www.readbyqxmd.com/read/29050543/granulomatous-necrotizing-myositis-in-swine-affected-by-porcine-circovirus-disease
#11
Guilherme Konradt, Raquel A S Cruz, Daniele M Bassuino, Matheus V Bianchi, Caroline P de Andrade, Fernando S da Silva, David Driemeier, Saulo P Pavarini
Porcine circovirus type 2 (PCV2) is associated with multiple clinical syndromes in pigs, known as porcine circovirus diseases. This work describes an outbreak of porcine circovirus diseases with severe lesions affecting the skeletal muscle. Ninety-two pigs had apathy, weight loss, and diarrhea over a clinical course of 7 to 10 days. Approximately 30 of the pigs had stiff gait, muscle weakness, hind limb paresis, and recumbency. Twelve of the 92 pigs were necropsied, and 4 had pale discoloration of skeletal muscles with microscopic lesions of granulomatous necrotizing myositis...
January 1, 2017: Veterinary Pathology
https://www.readbyqxmd.com/read/29050190/-current-research-of-sympathetic-ophthalmia
#12
Y Di, J J Ye
Sympathetic ophthalmia (SO) is a rare, bilateral, non-necrotizing, granulomatous uveitis that usually occurs after open ocular injury or intraocular surgery. The pathophysiology is not clearly understood, but generally SO is an immediate hypersensitivity mediated by T lymphocytes which are related to ocular tissue antigens. The main histopathological features are granulation tissues composed of lymphocytes, macrophages and multinucleated giant cells. The clinical manifestations are different from person to person, which might be mild or severe...
October 11, 2017: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/29034814/entomophthoromycosis-and-mucormycosis-as-causes-of-pneumonia-in-vietnamese-potbellied-pigs
#13
Dawn E Evans, Atsushi Kawabata, Leslie D Wilson, Kenneth Kim, Shannon D Dehghanpir, Steve D Gaunt, Matt Welborn, Britton Grasperge, Marjorie S Gill
Two Vietnamese potbellied pigs ( Sus scrofa) had respiratory disease and, on autopsy, both pigs had large masses in the lungs and thoracic cavity. Microscopically, pulmonary and pleural masses contained large areas with hyphae surrounded by hypereosinophilic cellular debris rimmed by abundant eosinophils, lymphocytes, plasma cells, and histiocytes with occasional multinucleate giant cells. The hypereosinophilic debris usually formed tight cuffs, or "sleeves" around the hyphae, compatible with Splendore-Hoeppli-like material...
October 1, 2017: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/29033817/cholesterotic-fibrous-histiocytoma-in-a-patient-with-metabolic-syndrome
#14
Masatoshi Deguchi, Setsuya Aiba
Among the many variants of dermatofibroma, dermatofibroma with cholesterol cleft (cholesterotic fibrous histiocytoma) is extremely rare. Here, we describe the case of a 50-year-old male patient with a cholesterotic fibrous histiocytoma on his left lower leg. He presented with a hyperkeratotic nodule 6 mm in diameter with a brown surface on the extensor surface of his left lower leg. The lesion had developed over the course of a few years without any tendency to heal. A skin biopsy performed on the tumor showed histopathological findings compatible with those of dermatofibroma...
May 2017: Case Reports in Dermatology
https://www.readbyqxmd.com/read/29024210/a-case-of-anaplastic-lymphoma-kinase-positive-renal-cell-carcinoma-coincident-with-hodgkin-lymphoma
#15
Yuzo Oyama, Haruto Nishida, Takahiro Kusaba, Hiroko Kadowaki, Motoki Arakane, Tsutomu Daa, Dai Watanabe, Yasuyuki Akita, Fuminori Sato, Hiromitsu Mimata, Shigeo Yokoyama
We report a case of ALK-positive renal cell carcinoma coincident with Hodgkin lymphoma. The patient was a 19 year-old-girl without sickle cell trait. The right renal tumor was discovered concomitantly with Hodgkin lymphoma (HL). After chemotherapy for HL, right nephrectomy was performed. Microscopically, the tumor showed a solid and focally pseudo-papillary growth pattern studded with tubular structures. Most tumor cells were small bland eosinophilic cells, but rhabdoid cells, vacuolated cells, pleomorphic multinucleated giant cells were also admixed...
October 12, 2017: Pathology International
https://www.readbyqxmd.com/read/29021459/bilateral-frontal-lobe-vasogenic-edema-resulting-from-hypertrophic-pachymeningitis-due-to-granulomatosis-with-polyangiitis
#16
Sakiko Itaya, Yasuhiro Ueda, Zen Kobayashi, Hiroyuki Tomimitsu, Daisuke Kobayashi, Shuzo Shintani
A 61-year-old woman presented with a 1-month history of decreased activities of daily living. Magnetic resonance imaging revealed abnormal intensities of the bilateral frontal lobes and enhancement of the thickened dura matter. A biopsy of the dura mater revealed multinucleated giant cells. She had sinusitis and hematuria; she was diagnosed with granulomatosis with polyangiitis. Hypertrophic pachymeningitis (HPM) was considered to have interrupted the venous flow and caused vasogenic edema. Bilateral frontal lobe edema resulting from HPM due to granulomatosis with polyangiitis has not been reported...
October 11, 2017: Internal Medicine
https://www.readbyqxmd.com/read/28993026/effects-of-physical-characteristics-of-carbon-black-on-metabolic-regulation-in-mice
#17
Hsiao-Chi Chuang, Ta-Chih Hsiao, Chii-Hong Lee, Justin Chun-Te Lin, Kai-Jen Chuang, Po-Hao Feng, Tsun-Jen Cheng
Potential adverse effects of human exposure to carbon black (CB) have been reported, but limited knowledge regarding CB-regulated metabolism is currently available. To evaluate how physical parameters of CB influence metabolism, we investigated CB and diesel exhaust particles (DEPs) and attempted to relate various physical parameters, including the hydrodynamic diameter, zeta potential, and particle number concentrations, to lung energy metabolism in female BALB/c mice. A body weight increase was arrested by 3 months of exposure to CB of smaller-size fractions, which was negatively correlated with pyruvate in plasma...
October 6, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28981153/pleomorphic-fibroma-of-the-skin-with-mdm2-immunoreactivity-a-potential-diagnostic-pitfall
#18
Mehrnoosh Tashakori, Jason Pimentel, Brooke E Howitt, Jessica Sanchez, Susan Michalowski, Dhananjay Chitale, Adrian H Ormsby, Sean R Williamson
Pleomorphic fibroma is a rare benign cutaneous neoplasm characterized by spindle-shaped cells and multinucleated giant cells scattered throughout collagenous stroma. These morphologic features can lead to diagnostic confusion, including atypical lipomatous tumor as one consideration. In contrast to atypical lipomatous tumor, previous studies have found pleomorphic fibroma to be negative for MDM2 immunohistochemical staining and MDM2 gene amplification. Here, we present a case of pleomorphic fibroma of skin with nuclear MDM2 immunoreactivity in the absence of MDM2 gene amplification, underscoring the superiority of fluorescence in situ hybridization as a diagnostic test in this differential diagnosis...
October 5, 2017: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/28978905/early-progression-of-xanthogranulomatous-pyelonephritis-in-children-might-be-dependent-on-vimentin-expression
#19
Danuta Ostalska-Nowicka, Katarzyna Mackowiak-Lewandowicz, Aneta Konwerska, Jacek Zachwieja
BACKGROUND Xanthogranulomatous pyelonephritis (XP) is an extremely rare, severe, atypical form of chronic renal parenchymal inflammation accompanied by hydronephrosis and/or urolithiasis. The pathomechanism of XP is not yet fully understood. Microscopically, XP is indicated by the presence of multinucleated giant cells and lipid-laden macrophages, as well as inflammatory infiltration and intensive renal fibrosis. The lipid accumulation in kidney parenchyma may be secondary to the altered flow of low-density lipoprotein (LDL)-derived cholesterol particles inside the affected cells...
October 5, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28978713/t-cell-macrophage-fusion-triggers-multinucleated-giant-cell-formation-for-hiv-1-spreading
#20
Lucie Bracq, Maorong Xie, Marie Lambelé, Lan-Trang Vu, Julie Matz, Alain Schmitt, Jérôme Delon, Paul Zhou, Clotilde Randriamampita, Jérôme Bouchet, Serge Benichou
HIV-1-infected macrophages participate in virus dissemination and establishment of virus reservoirs in host tissues, but the mechanisms for virus cell-to-cell transfer to macrophages remain unknown. Here, we reveal the mechanisms for cell-to-cell transfer from infected T cells to macrophages and virus spreading between macrophages. We show that contacts between infected T lymphocytes and macrophages lead to cell fusion for fast and massive transfer of CCR5-tropic viruses to macrophages. Through the merge of viral material between T cells and macrophages, these newly formed lymphocyte/macrophage fused cells acquire the ability to fuse with neighboring non-infected macrophages...
October 4, 2017: Journal of Virology
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