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https://www.readbyqxmd.com/read/29031189/renal-subcapsular-xenografing-of-human-fetal-external-genital-tissue-a-new-model-for-investigating-urethral-development
#1
Dylan Isaacson, Joel Shen, Mei Cao, Adriane Sinclair, Xuan Yue, Gerald Cunha, Laurence Baskin
In this paper, we introduce our novel renal subcapsular xenograft model for the study of human penile urethral and clitoral development. We grafted fifteen intact fetal penes and clitorides 8-11 weeks fetal age under the renal capsules of gonadectomized athymic mice. The mice were treated with a subcutaneous pellet of dihydrotestosterone (DHT), diethylstilbestrol (DES) or untreated with hormones. Xenografts were harvested after fourteen days of growth and analyzed via serial histologic sectioning and immunostaining for Ki-67, cytokeratins 6, 7 and 10, uroplakin and the androgen receptor...
September 22, 2017: Differentiation; Research in Biological Diversity
https://www.readbyqxmd.com/read/29025656/dual-delivery-of-vegf-and-ngf-by-emulsion-electrospun-nanofibrous-scaffold-for-peripheral-nerve-regeneration
#2
Bin Xia, Yonggang Lv
Controlled delivery of multiple therapeutic agents can be considered an effective approach in nerve injury due to its multifunction. In this study, recombinant human vascular endothelial growth factor (VEGF) and recombinant human nerve growth factor (NGF) were loaded on the surface and in the core of emulsion electrospun poly (l-lactic acid) (PLLA) nanofibrous scaffold, respectively. The in vitro studies showed that VEGF and NGF had a sequential release pattern in which most of the VEFG was released in the first few days but the NGF could be continuously released for >1month...
January 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/29023932/xanthogranulomatous-cholecystitis-exhibits-overlapping-histologic-features-with-igg4-related-cholecystitis
#3
Soon Auck Hong, You Na Sung, Hyoung Jung Kim, Sang Soo Lee, Jae Hoon Lee, Chul-Soo Ahn, Shin Hwang, Eunsil Yu, Yoh Zen, Myung-Hwan Kim, Seung-Mo Hong
AIMS: Xanthogranulomatous cholecystitis (XGC), an unusual histologic variant of chronic cholecystitis, is characterized by mixed foamy histiocytic and lymphoplasmocytic infiltration and fibrosis. Radiologically, the poorly defined nodular growth pattern often leads to the misinterpretation of XGC as gallbladder cancer. In this study, we aimed to identify the relationship of XGC with IgG4-related cholecystitis, METHODS AND RESULTS: We re-evaluated 57 surgically resected XGCs and 104 conventional chronic cholecystitis cases, according to the histologic features observed in IgG4-related disease, including lymphoplasmocytic infiltration, storiform fibrosis, obliterative phlebitis, and IgG4-positive plasma cells...
October 11, 2017: Histopathology
https://www.readbyqxmd.com/read/29023914/melanocytic-naevi-with-perineurial-differentiation-a-distinctive-variant-of-neurotised-naevi-and-a-diagnostic-pitfall-with-desmoplastic-melanoma
#4
Ingrid Ferreira, Peter Kind, Ivo Van Den Berghe, Lucy Melly, Felix Offner, Jason L Hornick, Thomas Brenn
AIMS: Spindle cell differentiation is not an uncommon finding in common acquired naevi and may represent a form of neurotisation with Schwannian differentiation of melanocytes. Perineurial differentiation in this context appears to be distinctly rare and is only poorly documented in the literature. METHODS AND RESULTS: We have identified six melanocytic tumours showing spindle cell morphology and perineurial differentiation from routine and referral material. Clinical data and follow-up were obtained, and the histological and immunohistochemical features were analysed...
October 11, 2017: Histopathology
https://www.readbyqxmd.com/read/28984690/pd-1-pd-l1-and-vegf-a-vegf-c-expression-in-lymph-node-microenvironment-and-association-with-melanoma-metastasis-and-survival
#5
Cristina Alessi, Cristovam Scapulatempo Neto, Cristiano R Viana, Vinicius de Lima Vazquez
Regional lymph nodes are affected frequently by melanoma metastasis. Its microenvironment may be associated with tumor progression. We investigated sentinel nodes with and without tumor and negative nodes surrounding positive nodes, looking for patterns related to tumor immune interaction and lymphovascular progression. We quantified programmed cell death protein 1 (PD-1)/programmed cell death-ligand 1, vascular endothelial growth factor (VEGF)-A/VEGF-C expressions in lymph nodes of 103 patients who underwent sentinel lymph node biopsy...
October 3, 2017: Melanoma Research
https://www.readbyqxmd.com/read/28954503/place-of-residence-does-not-significantly-influence-radiological-morphology-of-cervical-cancer
#6
Franciszek Burdan, Agnieszka Mocarska, Robert Klepacz, Jerzy Walocha, Tomasz Kubiatowski, Dariusz Surdyka, Dariusz Kieszko, Krzysztof Patyra, Iwonna Żelzowska-Cieślińska, Elżbieta Starosławska
INTRODUCTION AND OBJECTIVE: Cervical squamous cell carcinoma is one of the most common malignancies of women. Its incidence and morphology was analyzed based on the magnetic resonance (MR) data among rural and urban residents. MATERIAL AND METHODS: The study involved 61 Caucasian women (58.26±9.63 years) preliminary diagnosed with a cervical cancer without any previous treatment. Standard MR examination, including diffusion weighted imagining, apparent diffusion coefficient (ADC) value measurement and dynamic contrast enhancement, was performed...
September 21, 2017: Annals of Agricultural and Environmental Medicine: AAEM
https://www.readbyqxmd.com/read/28947648/requirement-and-synergistic-contribution-of-paf-acetylhydrolase-sse-and-streptolysin-s-to-inhibition-of-neutrophil-recruitment-and-systemic-infection-by-hypervirulent-emm3-group-a-streptococcus-in-subcutaneous-infection-of-mice
#7
Wenchao Feng, Dylan Minor, Mengyao Liu, Benfang Lei
Hypervirulent Group A Streptococcus (GAS) can inhibit neutrophil recruitment and cause systemic infection in mouse model of skin infection. The purpose of this study was to determine whether PAF acetylhydrolase Sse and streptolysin S (SLS) have synergistic contributions to inhibition of neutrophil recruitment and systemic infection in subcutaneous infection of mice by MGAS315, a hypervirulent genotype emm3 GAS strain. Deletions of sse and sagA in MGAS315 synergistically reduced skin lesion size and GAS burden in the liver and spleen...
September 25, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28940653/the-clinicoaetiological-hormonal-and-histopathological-characteristics-of-melasma-in-men
#8
S Handa, D De, G Khullar, B D Radotra, N Sachdeva
BACKGROUND: Melasma is relatively uncommon in males, and there is a paucity of data on male melasma, including its clinical pattern, triggering factors, endocrine profile and histopathological findings. AIM: To characterize the clinical findings and aetiological factors, including hormonal and histopathological features, of male melasma. METHODS: Male patients with melasma and age- and sex-matched healthy controls (HCs) were recruited. Demographic profile, risk factors, clinical pattern and Wood lamp findings of patients were recorded...
September 22, 2017: Clinical and Experimental Dermatology
https://www.readbyqxmd.com/read/28935804/the-growth-pattern-of-neandertals-reconstructed-from-a-juvenile-skeleton-from-el-sidr%C3%A3-n-spain
#9
Antonio Rosas, Luis Ríos, Almudena Estalrrich, Helen Liversidge, Antonio García-Tabernero, Rosa Huguet, Hugo Cardoso, Markus Bastir, Carles Lalueza-Fox, Marco de la Rasilla, Christopher Dean
Ontogenetic studies help us understand the processes of evolutionary change. Previous studies on Neandertals have focused mainly on dental development and inferred an accelerated pace of general growth. We report on a juvenile partial skeleton (El Sidrón J1) preserving cranio-dental and postcranial remains. We used dental histology to estimate the age at death to be 7.7 years. Maturation of most elements fell within the expected range of modern humans at this age. The exceptions were the atlas and mid-thoracic vertebrae, which remained at the 5- to 6-year stage of development...
September 22, 2017: Science
https://www.readbyqxmd.com/read/28935565/comparative-postnatal-histomorphogenesis-of-the-mandible-in-wild-and-laboratory-mice
#10
Jessica Martínez-Vargas, Cayetana Martinez-Maza, Francesc Muñoz-Muñoz, Nuria Medarde, Hayat Lamrous, María José López-Fuster, Jorge Cubo, Jacint Ventura
The coordinated activity of bone cells (i.e., osteoblasts and osteoclasts) during ontogeny underlies observed changes in bone growth rates (recorded in bone histology and bone microstructure) and bone remodeling patterns explaining the ontogenetic variation in bone size and shape. Histological cross-sections of the mandible in the C57BL/6J inbred mouse strain were recently examined in order to analyze the bone microstructure, as well as the directions and rates of bone growth according to the patterns of fluorescent labeling, with the aim of description of the early postnatal histomorphogenesis of this skeletal structure...
September 18, 2017: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
https://www.readbyqxmd.com/read/28934825/the-potential-roles-of-melf-pattern-microvessel-density-and-vegf-expression-in-survival-of-patients-with-endometrioid-endometrial-carcinoma-a-morphometrical-and-immunohistochemical-analysis-of-100-cases
#11
Dmitry Aleksandrovich Zinovkin, Md Zahidul Islam Pranjol, Daniil Rudolfovich Petrenyov, Eldar Arkadievich Nadyrov, Oleg Gennadievich Savchenko
BACKGROUND: In this study, we hypothesized that microcystic, elongated, fragmented (MELF)-pattern, vascular endothelial growth factor (VEGF) expression by cancer cells and microvessel density of cancer stroma may be associated with progression of endometrioid adenocarcinoma. METHODS: The study used data from the Belarus Cancer Registry and archival histological material of 100 patients with retrospectively known good (survival) and poor (disease progression and death) outcomes...
September 2017: Journal of Pathology and Translational Medicine
https://www.readbyqxmd.com/read/28932588/kras-mutation-positive-mucinous-adenocarcinoma-originating-in-the-thymus
#12
Ichiro Sakanoue, Hiroshi Hamakawa, Daichi Fujimoto, Yukihiro Imai, Kazuhiro Minami, Keisuke Tomii, Yutaka Takahashi
Thymic carcinoma is a rare, aggressive disease with a low 5-year survival rate. The most common histological neoplastic thymic tumor subtype is squamous cell. We describe an interesting case of a 39-year-old woman who presented with mucinous adenocarcinoma that originated in the thymus and was treated via radical resection and venoplasty of the superior vena cava (SVC). Macroscopically, the resected tumor contained a solid region and multiple cysts with abundant mucin. Microscopic examination showed a papillary growth pattern of goblet cells with round nuclei...
August 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28932038/unicystic-ameloblastoma-in-conjunction-with-peripheral-ameloblastoma-a-unique-case-report-presenting-with-diverse-histological-patterns
#13
Sravani Ghattamaneni, Shilpa Nallamala, Venkateswara Rao Guttikonda
Ameloblastomas are benign epithelial odontogenic neoplasms which are locally aggressive with an insidious growth pattern. Based on the clinical, radiographic, histopathology and behavioral and prognostic aspects, four variants of ameloblastoma are distinguished. They include solid/multicystic ameloblastoma, unicystic ameloblastoma (UA), peripheral ameloblastoma (PA) and desmoplastic ameloblastoma. UA and PA are two variants that have no clinical or radiological resemblance to each other. A case of simultaneous occurrence of these two lesions displaying an array of different histopathological entities together, with a note on pathological insight, has been reported in a 59-year-old adult male patient...
May 2017: Journal of Oral and Maxillofacial Pathology: JOMFP
https://www.readbyqxmd.com/read/28914715/diffuse-staining-for-activated-notch1-correlates-with-notch1-mutation-status-and-is-associated-with-worse-outcome-in-adenoid-cystic-carcinoma
#14
Dipti P Sajed, William C Faquin, Chris Carey, Eric A Severson, Amir H Afrogheh, Carl A Johnson, Stephen C Blacklow, Nicole G Chau, Derrick T Lin, Jeffrey F Krane, Vickie Y Jo, Joaquín J Garcia, Lynette M Sholl, Jon C Aster
NOTCH1 is frequently mutated in adenoid cystic carcinoma (ACC). To test the idea that immunohistochemical (IHC) staining can identify ACCs with NOTCH1 mutations, we performed IHC for activated NOTCH1 (NICD1) in 197 cases diagnosed as ACC from 173 patients. NICD1 staining was positive in 194 cases (98%) in 2 major patterns: subset positivity, which correlated with tubular/cribriform histology; and diffuse positivity, which correlated with a solid histology. To determine the relationship between NICD1 staining and NOTCH1 mutational status, targeted exome sequencing data were obtained on 14 diffusely NICD1-positive ACC specimens from 11 patients and 15 subset NICD1-positive ACC specimens from 15 patients...
November 2017: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28905513/large-cell-neuroendocrine-carcinoma-of-the-maxillary-sinus-on-fine-needle-aspiration-cytology-report-of-a-rare-case-with-a-focus-on-pitfalls-in-diagnosis
#15
Akihiko Kawahara, Takeharu Ono, Akiko Sumi, Hideyuki Abe, Yorihiko Takase, Kazuya Murata, Tomohiko Yamaguchi, Yoshiki Naito, Jun Akiba
Head and neck large cell neuroendocrine carcinoma (LCNEC) is a rare high-grade malignant tumor with neuroendocrine differentiation. We report a case of LCNEC causing difficulty in cytological diagnosis. A 60-year-old man with right-sided face pain presented with a swelling at the right cheek, and he complained of right nasal obstruction and lacrimation. Preoperative fine-needle aspiration cytology (FNAC) showed high cellularity, with a moderate number of clusters of tumor cells on an abundant necrotic background...
September 14, 2017: Diagnostic Cytopathology
https://www.readbyqxmd.com/read/28898987/typical-and-atypical-granular-cell-tumors-of-soft-tissue-a-clinicopathologic-study-of-50-patients
#16
Matthew Stemm, David Suster, Paul E Wakely, Saul Suster
Objectives: Granular cell tumors are rare neoplasms of neural origin. Despite the mesenchymal nature of these tumors, they rarely occur in the soft tissue, and as a result, this subset is not well characterized. We present the largest case series to date comprising 50 patients with benign and atypical soft tissue granular cell tumors in an effort to better define the pathologic features in this subset of lesions. Methods: All cases of soft tissue granular cell tumors from the Ohio State Medical Center and the Medical College of Wisconsin over a 10-year period were reviewed for histologic and clinical findings...
August 1, 2017: American Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28898190/renal-tumors-of-childhood-radiologic-pathologic-correlation-part-2-the-2nd-decade-from-the-radiologic-pathology-archives
#17
Ellen M Chung, Grant E Lattin, Kimberly E Fagen, Andrew M Kim, Michael A Pavio, Adam J Fehringer, Richard M Conran
Malignant renal tumors account for 7% of childhood cancers, and Wilms tumors are by far the most common-but not in older children and adolescents. Among individuals in the latter half of their 2nd decade of life, renal cell carcinoma (RCC) is more common than Wilms tumor. The histopathologic spectrum of RCCs in children differs from that in adults. The most common subtype of RCC in children and adolescents is Xp11.2 translocation RCC, which is distinguished by hyperattenuation at nonenhanced computed tomography, a defined capsule, and associated retroperitoneal lymphadenopathy...
September 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/28895242/hepatocellular-carcinoma-in-a-mouse-model-fed-a-choline-deficient-l-amino-acid-defined-high-fat-diet
#18
Ayae Ikawa-Yoshida, Saori Matsuo, Atsuhiko Kato, Yusuke Ohmori, Atsuko Higashida, Eiji Kaneko, Masahiko Matsumoto
Hepatocellular carcinoma (HCC) is a common cancer worldwide and represents the outcome of the natural history of chronic liver disease. The growing rates of HCC may be partially attributable to increased numbers of people with non-alcoholic fatty liver disease (NAFLD) and non-alcoholic steatohepatitis (NASH). However, details of the liver-specific molecular mechanisms responsible for the NAFLD-NASH-HCC progression remain unclear, and mouse models that can be used to explore the exact factors that influence the progression of NAFLD/NASH to the more chronic stages of liver disease and subsequent HCC are not yet fully established...
August 2017: International Journal of Experimental Pathology
https://www.readbyqxmd.com/read/28884745/clinicopathologic-and-genetic-characteristics-of-young-patients-with-pleural-diffuse-malignant-mesothelioma
#19
Marina Vivero, Raphael Bueno, Lucian R Chirieac
Pleural diffuse malignant mesothelioma typically presents during the seventh decade of life and has poor prognosis. Recent epidemiologic studies have shown differences between young and older mesothelioma patients, but the biology of pleural mesothelioma in young patients is poorly understood. We studied the clinicopathologic and genetic characteristics in pleural mesothelioma patients aged 35 years and younger. Thirty-six consecutive pleural mesothelioma patients aged 35 years and younger were compared with 48 older patients...
September 8, 2017: Modern Pathology: An Official Journal of the United States and Canadian Academy of Pathology, Inc
https://www.readbyqxmd.com/read/28884088/oncolytic-viral-therapy-for-mesothelioma
#20
REVIEW
Daniel F Pease, Robert A Kratzke
The limited effectiveness of conventional therapy for malignant pleural mesothelioma demands innovative approaches to this difficult disease. Even with aggressive multimodality treatment of surgery, radiation, and/or chemotherapy, the median survival is only 1-2 years depending on stage and histology. Oncolytic viral therapy has emerged in the last several decades as a rapidly advancing field of immunotherapy studied in a wide spectrum of malignancies. Mesothelioma makes an ideal candidate for studying oncolysis given the frequently localized pattern of growth and pleural location providing access to direct intratumoral injection of virus...
2017: Frontiers in Oncology
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