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https://www.readbyqxmd.com/read/29773426/stem-cell-transcription-factor-sox2-in-synovial-sarcoma-and-other-soft-tissue-tumors
#1
Heba Zayed, Iver Petersen
BACKGROUND: SOX2 has gained considerable interest as a pluripotency inducing gene. Co-transfection of SOX2 together with NANOG, KLF4 and c-MYC into adult fibroblasts was able to generate pluripotent stem cells. SOX2 has been reported to be expressed in synovial sarcoma, a tumor being characterized by the SS18-SSX gene fusion forming part of the SWI/SNF chromatin remodeling complex that affects histone methylation. The role of SOX2 in this tumor type as well as other soft tissue tumor entities however is still poorly characterized...
May 4, 2018: Pathology, Research and Practice
https://www.readbyqxmd.com/read/29772366/giant-cell-ependymoma-of-cervical-medullary-junction-a-case-report-of-a-long-term-survivor-and-review-of-literature
#2
REVIEW
Martina Cappelletti, Andrea G Ruggeri, Giorgia Iacopino, Roberto Delfini
Ependymoma accounts for 3-9% of all neuroepithelial tumors. The giant cell ependymoma is a rare and distinct variant, of which only twenty-two cases have been described in literature. Starting from 2007, the WHO acknowledged this rare subtype. The cytological features of GCE are the presence of pleomorphic giant cells with several cellular atypias, which at intra-operative frozen diagnosis may appear to be high-grade glial lesions. Despite its apparently malignant histology, GCE seems to be a neoplasm with a relatively good prognosis...
May 14, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29772256/extremely-halophilic-pleomorphic-archaeal-virus-hrpv9-extends-the-diversity-of-pleolipoviruses-with-integrases
#3
Nina S Atanasova, Tatiana A Demina, Sudar N V Krishnam Rajan Shanthi, Hanna M Oksanen, Dennis H Bamford
Certain pleomorphic archaeal viruses are highly infectious even at saturated salt. These viruses belong to the genus Betapleolipovirus of the recently described archaeal virus family Pleolipoviridae. Pleolipoviruses comprise single-stranded or double-stranded, circular or linear DNA genomes that share countless homologs among various archaeal genetic elements. Here we describe a new extremely halophilic betapleolipovirus, Halorubrum pleomorphic virus 9 (HRPV9), which has an integrase gene. We also identified new genes encoding minor pleolipoviral structural proteins...
May 14, 2018: Research in Microbiology
https://www.readbyqxmd.com/read/29771690/heavily-pigmented-epithelioid-melanoma-with-loss-of-protein-kinase-a-regulatory-subunit-%C3%AE-expression
#4
Jarish N Cohen, Jessica A Spies, Fawn Ross, Angela Bohlke, Timothy H McCalmont
Heavily pigmented melanocytic neoplasms are genotypically and phenotypically diverse. Recently, a subset of this histopathologic spectrum was shown to harbor recurrent genetic alterations in the gene-encoding protein kinase A regulatory subunit-α (PRKAR1A). To date, no histopathologic descriptions of melanomas arising from this pathway have been described. We present a case of a darkly pigmented papule arising on the posterior neck of a 28-year-old man. Microscopically, the heavily pigmented compound melanocytic proliferation was centered in the dermis with permeation into the superficial subcutis...
May 16, 2018: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/29771093/-pharyngeal-space-carcinoma-ex-pleomorphic-adenoma%C3%AF-a-case-report
#5
Y L Jiang, H S Peng, S H Wu, X H Xie, X H Zhu, Y H Liu
Carcinoma ex pleomorphic adenoma is an epithelial malignant tumor of pleomorphic adenoma. This may be due to the accumulation of genetic instability caused by long-term pleomorphic adenomas. There are few reports of parapharyngeal space carcinoma ex pleomorphic adenoma in the literature study both at home and abroad. This article retrospectively summarized the clinical data of 1 case of pharyngeal space carcinoma ex pleomorphic adenoma and reviewed the literature. We strengthened the understanding of parapharyngeal space carcinoma ex pleomorphic adenoma, improve the accuracy of diagnosis and reduce misdiagnosis and mistreatment...
May 2018: Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery
https://www.readbyqxmd.com/read/29765822/minimally-invasive-surgery-for-resection-of-parapharyngeal-space-tumors
#6
Irit Duek, Gill E Sviri, Salem Billan, Ziv Gil
Background  Surgical removal of parapharyngeal space tumors (PPST) poses challenges due to the complex anatomy of the region. PPSTs are routinely resected by a transcervical approach using blind finger dissection. Large PPSTs or those located high at the skull base, often require transmandibular or infratemporal fossa approaches, associated with considerable morbidity. Objective  Here, we describe an approach for PPST removal that comprises transcervical endoscopic, with or without transoral robotic technique...
June 2018: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/29765529/-myc-gene-amplification-is-a-rare-event-in-atypical-fibroxanthoma-and-pleomorphic-dermal-sarcoma
#7
Timo Gaiser, Daniela Hirsch, Azadeh Orouji, Marisa Bach, Peter Kind, Doris Helbig, Alexander Quaas, Jochen Utikal, Alexander Marx, Maria Rita Gaiser
Atypical fibroxanthoma (AFX) and pleomorphic dermal sarcoma (PDS) are rare malignancies typically occurring in elderly patients and predominantly located in skin regions exposed to UV-light. Thus, a role of UV-radiation-induced damage for AFX and PDS tumorigenesis has been postulated. MYC gene amplification has been demonstrated as a distinctive feature of radiation-induced angiosarcoma. In order to investigate whether chronic exposure to UV-light might also lead to MYC copy number changes, 51 AFX and 24 PDS samples were retrospectively analyzed for MYC amplification by fluorescence in situ hybridization using a MYC and a CEP8 gene probe...
April 20, 2018: Oncotarget
https://www.readbyqxmd.com/read/29764037/-the-value-of-high-resolution-diffusion-weighted-imaging-in-differentiating-benign-and-malignant-epithelial-tumors-of-parotid-gland
#8
B H Wen, J L Cheng, H X Zhang, Z X Zhang, F F Wang, K K Xue
Objective: To investigate the diagnostic value of RESOLVE DWI in the evaluation of benign and malignant epithelial tumors of parotid gland. Methods: A total of 106 patients in the First Affiliated Hospital of Zhengzhou University with epithelial tumors of parotid gland confirmed by pathology from July 2015 to October 2017 were retrospectively analyzed. All patients underwent preoperative routine MRI and RESOLVE DWI, the ADC average values were calculated, t test were used to compare the ADC values of benign and malignant epithelial tumors of parotid gland...
May 8, 2018: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/29763716/prognostic-factors-in-primary-anorectal-melanoma-a-clinicopathologic-study-of-60-cases-in-china
#9
Min Ren, Yawen Lu, Jiaojie Lv, Xuxia Shen, Jincheng Kong, Bo Dai, Yunyi Kong
To investigate the clinicopathologic features and prognostic factors of primary anorectal melanoma, we described the clinical presentations, histopathology, and prognosis of 60 cases in China. Patients' age ranged from 17 to 86years with a female-to-male ratio of 2.33:1. The prevalent anatomic site of tumor was anorectum. The mean tumor thickness was 11.5mm and mean tumor size was 2.9cm. Abdominoperineal resection was performed on 38 (63.3%) patients, while wide local excision on 22 (36.7%) patients. Thirty-three (55...
May 12, 2018: Human Pathology
https://www.readbyqxmd.com/read/29763623/molecular-pathological-radiological-and-immune-profiling-of-non-brainstem-pediatric-high-grade-glioma-from-the-herby-phase-ii-randomized-trial
#10
Alan Mackay, Anna Burford, Valeria Molinari, David T W Jones, Elisa Izquierdo, Jurriaan Brouwer-Visser, Felice Giangaspero, Christine Haberler, Torsten Pietsch, Thomas S Jacques, Dominique Figarella-Branger, Daniel Rodriguez, Paul S Morgan, Pichai Raman, Angela J Waanders, Adam C Resnick, Maura Massimino, Maria Luisa Garrè, Helen Smith, David Capper, Stefan M Pfister, Thomas Würdinger, Rachel Tam, Josep Garcia, Meghna Das Thakur, Gilles Vassal, Jacques Grill, Tim Jaspan, Pascale Varlet, Chris Jones
The HERBY trial was a phase II open-label, randomized, multicenter trial evaluating bevacizumab (BEV) in addition to temozolomide/radiotherapy in patients with newly diagnosed non-brainstem high-grade glioma (HGG) between the ages of 3 and 18 years. We carried out comprehensive molecular analysis integrated with pathology, radiology, and immune profiling. In post-hoc subgroup analysis, hypermutator tumors (mismatch repair deficiency and somatic POLE/POLD1 mutations) and those biologically resembling pleomorphic xanthoastrocytoma ([PXA]-like, driven by BRAF_V600E or NF1 mutation) had significantly more CD8+ tumor-infiltrating lymphocytes, and longer survival with the addition of BEV...
May 14, 2018: Cancer Cell
https://www.readbyqxmd.com/read/29763477/gone-fishing-a-unique-histologic-pattern-in-cutaneous-angiosarcoma
#11
Ashley P Schmidt, B Joel Tjarks, Douglas W Lynch
Cutaneous angiosarcoma is a rare but aggressive vascular malignancy that can present a diagnostic challenge due to a wide variety of clinical appearances and histologic features. Final diagnosis traditionally is yielded by corroborating the histologic and immunohistochemical findings with the clinical presentation; however, a histologic feature known as "fish in the creek," which consists of free-floating or tufted pleomorphic spindle cells within the vascular lumen, may be an additional diagnostic clue...
April 2018: Cutis; Cutaneous Medicine for the Practitioner
https://www.readbyqxmd.com/read/29763370/novel-interleukin-33-and-its-soluble-st2-receptor-as-potential-serum-biomarkers-in-parotid-gland-tumors
#12
Sowa Pawel, Misiolek Maciej, Zielinski Maciej, Mazur Bogdan, Adamczyk-Sowa Monika
An increasing number of patients with parotid gland tumors have been observed in recent years. The relationship between the immune system and tumor formation is thoroughly investigated. However, newly discovered molecules offer a new insight into the pathophysiology of malignancies. It would be ideal to find an easily determinable biomarker of tumor existence, its malignant potential or a biomarker suggesting the probability of disease recurrence. Our study is the first to examine serum concentrations of IL-33 and its sST2 receptor in patients with various types of parotid gland tumors...
May 2018: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/29762889/endothelial-cell-density-and-characterization-of-corneal-endothelial-cells-in-the-tawny-owl-strix-aluco-using-specular-microscopy
#13
Natàlia Coyo, Marta Leiva, Daniel Costa, Rafael Molina, Olga Nicolás, Jose Ríos, Maria Teresa Peña
OBJECTIVE: To determine endothelial cell density (ECD) and morphology and morphometry of corneal endothelial cells in the tawny owl (Strix aluco), as well as to report the effects of aging on these parameters. ANIMAL STUDY AND PROCEDURES: Twenty tawny owls were included in the study and classified into 2 groups according to their age: fledglings (<1 year old) and adults (>1 year old). Central corneal endothelium was studied by means of noncontact specular microscopy (Specular Microscope SP-2000P; Topcon, Tokyo, Japan), and results for ECD (cells/mm2 ), mean cell area ((MCA (μm2 )), polymegathism (CV), and pleomorphism (% hexagonal cells) were obtained...
May 15, 2018: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29759015/morphologic-and-immunohistochemical-characteristics-of-anorectal-melanoma
#14
Ahmad Charifa, Xuchen Zhang
Anorectal melanoma is a rare aggressive disease. Due to its rarity and considerable histologic and immunohistochemical variabilities, misdiagnosis as lymphoma, carcinoma, sarcoma, and/or gastrointestinal stromal tumor is not uncommon, particularly in amelanotic cases. We reviewed histologic features and immunohistochemical stains of 19 anorectal melanoma cases. Histopathologic features were evaluated including junctional activity, melanin pigment, and morphologic features. Immunohistochemical stains were performed using Sox10, S100 protein, HMB-45, melan-A, CD56, and cytokeratins...
May 1, 2018: International Journal of Surgical Pathology
https://www.readbyqxmd.com/read/29756618/intraparotid-facial-nerve-schwannoma-two-case-reports-and-a-review-of-the-literature
#15
M Simone, E Vesperini, C Viti, A Camaioni, L Lepanto, F Raso
Schwannomas are rare benign tumours that arise from Schwann cells. The most known and studied is the intracranial vestibular schwannoma, even if it is not the most frequent. More often schwannomas arise from peripheral sensitive nerves, and the vagous is most involved among the cranial nerves. Intraparotid schwannomas account for just 10% of all facial involvement, so they are an extremely rare localisation. At present, there are less than 100 cases described in the literature. We performed a retrospective analysis of parotidectomy in two Italian hospitals and present two cases of intraparotid schwannoma and a review of the literature...
February 2018: Acta Otorhinolaryngologica Italica
https://www.readbyqxmd.com/read/29756323/primary-mediastinal-histiocytic-sarcoma-presenting-as-pleural-effusion
#16
Jie-Yang Jhuang, Wei-Yu Chen, Shih-Sung Chuang
Histiocytic sarcoma (HS) is a rare malignant neoplasm showing morphological and immunophenotypic features of mature tissue histiocytes. As HS may mimic non-Hodgkin lymphoma (NHL) pathologically, before the era of immunohistochemistry, many previously reported cases were misdiagnosed NHL. Up to date, there are only a few reports delineating the cytological features in fine-needle aspiration or bronchoalveolar lavage, but not in the effusion fluid yet. Herein, we report the case of a 61-year-old male with a mediastinal tumor presenting with malignant pleural effusion...
May 13, 2018: Diagnostic Cytopathology
https://www.readbyqxmd.com/read/29755265/pleomorphic-adenoma-of-the-lacrimal-gland-a-review-with-updates-on-malignant-transformation-and-molecular-genetics
#17
REVIEW
William Harrison, Patricia Pittman, Thomas Cummings
Pleomorphic adenoma (benign mixed tumor) is the most common epithelial neoplasm of the lacrimal gland. It is usually a slow growing, well-circumscribed, mass that is identical to its salivary gland counterpart. Patients generally have an excellent prognosis for vision and long-term survival after complete surgical excision. There is a tendency to reoccur, especially if there is an incomplete excision, and rarely, malignant transformation to carcinoma ex pleomorphic adenoma can occur, which has a much poorer prognosis...
January 2018: Saudi Journal of Ophthalmology: Official Journal of the Saudi Ophthalmological Society
https://www.readbyqxmd.com/read/29755082/-pulmonary-pleomorphic-carcinoma-relapsed-after-surgery-surviving-long-term-by-chemotherapy-and-nivolumab
#18
Osamu Kawamata, Toshihiro Murata, Masashi Uda
A 60'-year-old man was referred to our hospital because of nodular shadow found at mass screening. We diagnosed the tumor as non-small cell lung cancer by transbronchial biopsy. Chest computed tomography showed a tumor shadow of 3 cm in diameter with cavity. Right middle lobectomy was performed and the pathological diagnosis was pleomorphic carcinoma of the lung. The tumor recurrence was found at 10 months after surgery, and was treated with cisplatin, docetaxel plus bevacizumab for 6 cycles. A complete remission was achieved, but regrowth at 5 months after chemotherapy was noted...
May 2018: Kyobu Geka. the Japanese Journal of Thoracic Surgery
https://www.readbyqxmd.com/read/29753007/evaluating-agreement-histological-features-and-relevance-of-separating-pleomorphic-and-florid-lobular-carcinoma-in-situ-subtypes
#19
Kamaljeet Singh, Cherie Paquette, Elizabeth T Kalife, Yihong Wang, Shamlal Mangray, M Ruhul Quddus Md MPhil, Margaret M Steinhoff
Morphological variants of lobular carcinoma in situ (LCIS) include classical- (CLCIS), pleomorphic- (PLCIS) and florid-type (FLCIS). Treatment guidelines suggest managing PLCIS and FLCIS like ductal carcinoma in situ (DCIS); therefore accurate identification of LCIS subtypes is critical. However significance of separating PLCIS from FLCIS is not clear. Also inter-observer agreement in identifying LCIS subtypes, using contemporary criteria, is not known. We aimed to evaluate inter-observer agreement amongst breast pathologists in diagnosing LCIS subtypes and use the agreement data to justify LCIS classification for management purposes...
May 9, 2018: Human Pathology
https://www.readbyqxmd.com/read/29751075/analysis-by-uplc-ms-qtof-and-antifungal-activity-of-guava-psidium-guajava-l
#20
Camila Fonseca Bezerra, Janaína Esmeraldo Rocha, Maria Karollyna do Nascimento Silva, Thiago Sampaio de Freitas, Amanda Karine de Sousa, Antônia Thassya Lucas Dos Santos, Rafael Pereira da Cruz, Maciel Horácio Ferreira, Josefa Carolaine Pereira da Silva, Antonio Judson Targino Machado, Joara Nályda Pereira Carneiro, Débora Lima Sales, Henrique Douglas Melo Coutinho, Paulo Riceli Vasconcelos Ribeiro, Edy Sousa de Brito, Maria Flaviana Bezerra Morais-Braga
Psidium guajava L. is a plant widely used for food and in folk medicine all over the world. Studies have shown that guava leaves have antifungal properties. In this study, Flavonoid and Tannic fractions were tested to investigate their chemical composition and antifungal potential in vitro.21 compounds in the two fractions, presenting a higher content of phenolic compounds. The antifungal assays were performed against Candida albicans, Candida tropicalis and Candida krusei by microdilution to determine the IC50 and the cell viability curve...
May 8, 2018: Food and Chemical Toxicology
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