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https://www.readbyqxmd.com/read/28431179/mirna-regulation-in-gliomas-usual-suspects-in-glial-tumorigenesis-and-evolving-clinical-applications
#1
Heather Ames, Marc K Halushka, Fausto J Rodriguez
In recent years, an increasing role for noncoding small RNAs (miRNA) has been uncovered in carcinogenesis. These oligonucleotides can promote degradation and/or inhibit translation of key mRNAs. Recent studies have also highlighted a possible role for miRNAs in adult and pediatric brain tumors, including high- and low-grade gliomas, medulloblastoma, ependymoma, and neoplasms associated with neurofibromatosis type 1. Gliomas represent the most common category of primary intraparenchymal brain tumors, and, for example, manipulation of signaling pathways, through inhibition of PTEN transcription appears to be an important function of miRNA dysregulation through miR-21, miR-106b, and miR-26a...
April 1, 2017: Journal of Neuropathology and Experimental Neurology
https://www.readbyqxmd.com/read/28430954/increased-multinucleated-megakaryocytes-as-an-isolated-finding-in-bone-marrow-%C3%A2-a-rare-finding-and-its-clinical-significance
#2
Majd D Jawad, Ronald S Go, Kaaren K Reichard, Min Shi
Objectives: Multinucleated megakaryocytes are a unique morphologic form of megakaryocytes characterized by multiple, distinctly separated nuclei. We investigated whether increased multinucleated megakaryocytes (≥25%) in otherwise normal-appearing bone marrow were associated with the development of a myelodysplastic syndrome (MDS). Methods: We retrospectively reviewed the medical records and bone marrow biopsy specimens of patients evaluated at our institution from 2011 to 2015 that met all of the following criteria: (1) 25% or more multinucleated megakaryocytes, (2) no other dysplastic features, (3) absence of a myeloid neoplasm, and (4) absence of neoplastic karyotypic abnormalities...
November 1, 2016: American Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28430636/exploring-the-role-of-paraoxonase-2-in-bladder-cancer-analyses-performed-on-tissue-samples-urines-and-cell-cultures
#3
Tiziana Bacchetti, Davide Sartini, Valentina Pozzi, Tiziana Cacciamani, Gianna Ferretti, Monica Emanuelli
The enzyme paraoxonase-2 (PON2) is ubiquitously expressed and exerts its antiapoptotic and antioxidative functions in several intracellular compartments.The aim of this study is to investigate the role of PON2 in bladder cancer (BC). The expression levels of PON2 in paired tumor and normal bladder tissue samples and in urinary exfoliated cells from patients affected with BC and healthy donors were evaluated. Moreover, the effect of PON2 overexpression on tumor cell proliferation and susceptibility to oxidative stress was investigated in human bladder cancer cell line T24...
February 24, 2017: Oncotarget
https://www.readbyqxmd.com/read/28430347/hypopharyngeal-squamous-cell-carcinoma-and-laryngeal-neuroendocrine-carcinoma-colliding-in-the-aryepiglottic-fold-a-case-report
#4
Roberta Marangoni, Simone Mauramati, Giulia Bertino, Antonio Occhini, Marco Benazzo, Patrizia Morbini
PURPOSE: A collision tumor consists of 2 different histologically distinct and topographically independent tumors merging in the same mass. In the head and neck region they are rare, with only 4 cases reported in the larynx. CASE REPORT: A 60-year-old heavy smoker complained of a left submandibular lesion in October 2014. The lesion was excised and showed a poorly differentiated carcinoma, suggestive for adenocarcinoma. After a positron emission tomography-computed tomography scan showed increased metabolic activity in the left laterocervical region and right vocal cord, the patient underwent endoscopic biopsy of the lesion of the left piriform sinus, which was positive for moderately differentiated squamous cell carcinoma (SCC)...
April 14, 2017: Tumori
https://www.readbyqxmd.com/read/28430293/three-cases-of-ectopic-sphenoid-sinus-pituitary-adenoma
#5
Ernest Jan Bobeff, Karol Wiśniewski, Wielisław Papierz, Ludomir Stefańczyk, Dariusz Jan Jaskólski
<i><b>Introduction</b>: Ectopic sphenoid sinus pituitary adenoma is a rare tumour originating from embryologic remnants of Rathke's pouch. Although it is considered a clinically benign neoplasm, necrosis is encountered in 25% of cases and it can invade adjacent bone structures. <b>Aims</b>: To establish clinical, radiological and histopathological features of ectopic sphenoid sinus pituitary adenoma. <b>Material and methods: </b> Analysis of three cases: two females and one man, aged 61-70...
2017: Folia Neuropathologica
https://www.readbyqxmd.com/read/28430287/dysembryoplastic-neuroepithelial-tumour-insight-into-the-pathology-and-pathogenesis
#6
Iwona Sontowska, Ewa Matyja, Jacek Malejczyk, Wieslawa Grajkowska
<i>Dysembryoplastic neuroepithelial tumour (DNT) is categorized as a benign glioneuronal neoplasm affecting children and young adults with chronic epileptic seizures. It is characterized by predominant intracortical localization and nodular architecture. Dysembryoplastic neuroepithelial tumour usually demonstrates a distinctive morphological pattern with a specific glioneuronal element but occasionally, its morphological picture is heterogeneous and unspecific. Thus, considering the morphology of DNT, three different histopathological subtypes are distinguished: simple, complex, and non-specific and diffuse...
2017: Folia Neuropathologica
https://www.readbyqxmd.com/read/28429952/rare-cases-imitating-acute-appendicitis-three-case-reports-and-a-review-of-literature
#7
L Kunovsky, Z Kala, L Mitas, V Can, J Dolina, E Nemcová, L Klvacova, T Gajdosova, I Penka
Acute appendicitis with its characteristic clinical course is one of the most common diagnoses that require urgent surgery. The following three case reports present patients with symptoms typical of acute appendicitis which was, however, not confirmed intraoperatively. Preoperative CT or MRI were not requested because symptoms clearly indicated acute appendicitis. The first case describes a male patient with right-sided diverticulitis, the second case report involves a pregnant woman in 33rd week of gestation with right adnexal torsion due to a dermoid cyst, and in the last report, a case of spontaneous perforation of appendiceal mucinous neoplasm is presented...
2017: Rozhledy V Chirurgii: Měsíčník Československé Chirurgické Společnosti
https://www.readbyqxmd.com/read/28429647/malignant-rhabdoid-tumor-of-soft-tissue
#8
Julie Guilmette, Caroline Laverdière, Denis Soulières, Natasha Patey, Geneviève Soucy, Dominique Trudel, Dorothée Bouron-Dal Soglio
Introduction Malignant rhabdoid tumor (MRT) is defined as a high-grade sarcoma derived from an uncertain cell of origin. Its diagnosis is associated with poor prognosis and patient's life expectancy is greatly reduced. Material and method Here, we describe a unique case of 9-month-old boy who presented with a large MRT arising from the soft tissue of the neck. Following intensive multimodal treatment, the patient benefited from a 25 years' remission until the discovery of multiple liver metastases. Conclusion MRT of soft tissue needs to be distinguished from other soft tissue neoplasms, as MRT is highly aggressive and is usually associated with a poor outcome...
January 1, 2017: Pediatric and Developmental Pathology
https://www.readbyqxmd.com/read/28429517/primary-laryngeal-sarcomas-in-a-mexican-population-case-series-of-eleven-cases
#9
Kuauhyama Luna-Ortiz, Sarina Navarro-Santiesteban, Veronica Villavicencio-Valencia, Rosa A Salcedo-Hernandez, Leonardo S Lino-Silva, Juan A Delgado
Sarcomas are mesenchymal tumors that represent 1% of malignant diseases in humans. Of these, 4-10% occur in the head and neck and only <1% occur in the larynx.(1) These groups of neoplasms have a wide range of histological variants and, accordingly, their clinical behavior varies widely, from slow-growing, relatively circumscribed tumors, to rapidly growing, locally invasive malignancies. In addition, the heterogeneity of the location of the laryngeal anatomic sub-sites require special therapeutic considerations...
April 21, 2017: Clinical Otolaryngology
https://www.readbyqxmd.com/read/28429507/mucinous-hidradenoma-in-a-child-a-case-report-and-review-of-the-literature
#10
Aadil Ahmed, Wendy Kim, Jodi Speiser
Hidradenomas are benign tumors of the sweat glands that are rarely reported in childhood. The presence of mucinous change in hidradenomas, which consists of variable numbers of mucin-rich goblet cells, is occasionally observed in some adult clinical practices. However, it has not been previously reported in the pediatric population. Herein, we present a unique case of a mucinous hidradenoma presenting on the thigh of a 3-year old boy. The clinical presentation and histological features of the case, along with a literature review of published case reports of pediatric hidradenomas are described...
April 21, 2017: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/28429277/primary-ewing-sarcoma-primitive-neuroectodermal-tumor-of-the-kidney-a-clinicopathologic-study-of-23-cases
#11
Paari Murugan, Priya Rao, Pheroze Tamboli, Bogdan Czerniak, Charles C Guo
Primary Ewing sarcoma / primitive neuroectodermal tumor (ES) of the kidney is a rare neoplasm with limited clinicopathologic data. We report 23 such cases with no history of ES elsewhere in the body. The patients included 13 male and 10 female, aged 8-70 years (mean, 31 years). The average tumor size was 11.7 cm (range, 5-20 cm). Microscopic analysis showed predominantly lobular growth (n = 14), with focal papillary (n = 3), alveolar (n = 1), and hemangiopericytoma-like (n = 1) patterns. Several tumors (n = 11) exhibited robust mitotic activity (>10 mitoses/10 high-power fields)...
April 20, 2017: Pathology Oncology Research: POR
https://www.readbyqxmd.com/read/28428886/vaccination-with-inhibin-%C3%AE-provides-effective-immunotherapy-against-testicular-stromal-cell-tumors
#12
Robert Aguilar, Justin M Johnson, Patrick Barrett, Vincent K Tuohy
BACKGROUND: Testicular cancer is the most common male neoplasm occurring in men between the ages of 20 and 34. Although germ-line testicular tumors respond favorably to current standard of care, testicular stromal cell (TSC) tumors derived from Sertoli cells or Leydig cells often fail to respond to chemotherapy or radiation therapy and have a 5-year overall survival significantly lower than the more common and more treatable germ line testicular tumors. METHODS: To improve outcomes for TSC cancer, we have developed a therapeutic vaccine targeting inhibin-α, a protein produced by normal Sertoli and Leydig cells of the testes and expressed in the majority of TSC tumors...
2017: Journal for Immunotherapy of Cancer
https://www.readbyqxmd.com/read/28428724/hepatic-angiosarcoma-with-clinical-and-histological-features-of-kasabach-merritt-syndrome
#13
Sanya Wadhwa, Tae Hun Kim, Leah Lin, Gary Kanel, Takeshi Saito
Hepatic angiosarcoma is a mesenchymal tumor originating from liver sinusoidal endothelial cells. It is an extremely rare malignant neoplasm accounting for less than 1% of primary malignant liver tumors. The deregulated coagulopathy that can be seen in hepatic angiosarcoma fulfills the clinical diagnostic criteria of disseminated intravascular coagulation. However, the mechanism that governs this coagulopathy has been poorly understood. This case report provides histological evidence of the consumption of coagulation factors along with trapped platelets occurring within the tumor, which is the foundation for the concept of Kasabach-Merritt syndrome (KMS)...
April 7, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28428442/combination-of-ibrutinib-and-abt-199-in-diffuse-large-b-cell-lymphoma-and-follicular-lymphoma
#14
Hsu-Ping Kuo, Scott A Ezell, Karl J Schweighofer, Leo Wk Cheung, Sidney Hsieh, Mutiah Apatira, Mint Sirisawad, Karl Eckert, Ssucheng J Hsu, Chun-Te Chen, Darrin M Beaupre, Matthias Versele, Betty Y Chang
Diffuse large B-cell lymphoma (DLBCL) and follicular lymphoma (FL) are the most prevalent B-lymphocyte neoplasms in which abnormal activation of the Bruton's tyrosine kinase (BTK)-mediated B-cell receptor (BCR) signaling pathway contributes to pathogenesis. Ibrutinib is an oral covalent BTK inhibitor that has shown some efficacy in both indications. To improve ibrutinib efficacy through combination therapy, we first investigated differential gene expression in parental and ibrutinib-resistant cell lines to better understand the mechanisms of resistance...
April 20, 2017: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/28428105/microcarcinoid-arising-in-patients-with-long-standing-ulcerative-colitis-histological-analysis
#15
Sachie Kanada, Akira Sugita, Tetuo Mikami, Kenichi Ohashi, Hiroyuki Hayashi
Some case reports of neuroendocrine tumors (NETs) and neuroendocrine carcinoma (NEC) associated with ulcerative colitis (UC) have been published. Most NET cases are small lesions corresponding to microcarcinoids (MCs). However, published case reports have presented findings of MCs as single-case reports. Thus, the frequency of MCs is still unclear. In this study, we described the clinical and morphological features of 14 cases of UC-associated MC and estimated the frequency of MC. Consecutive patients with UC who underwent complete removal of the large intestine were assessed, and 135 patients were selected...
April 17, 2017: Human Pathology
https://www.readbyqxmd.com/read/28428103/characteristics-and-clinical-implications-of-reactive-germinal-centers-in-the-bone-marrow
#16
Rose Lou Marie C Agbay, L Jeffrey Medeiros, Joseph D Khoury, Alireza Salem, Carlos E Bueso-Ramos, Sanam Loghavi
Reactive germinal centers (GCs) in the bone marrow (BM) have been described in patients with autoimmune disorders, infections, malignancies and following certain drug therapies, or as an isolated finding without obvious underlying disease. In this study, we describe the clinical conditions in which reactive GCs occur in BM samples, and their topography and accompanying laboratory and ancillary findings in the setting of a cancer center. We identified 32 BM specimens with reactive GCs with an estimated frequency of <0...
April 17, 2017: Human Pathology
https://www.readbyqxmd.com/read/28427522/the-role-of-anti-pd-1-and-anti-pd-l1-agents-in-the-treatment-of-diffuse-large-b-cell-lymphoma-the-future-is-now
#17
REVIEW
Luis Miguel Juárez-Salcedo, Jose Sandoval-Sus, Lubomir Sokol, Julio C Chavez, Samir Dalia
Immune checkpoints inhibitors have been incorporated into standard treatment protocols for advanced solid tumors. The aim of T-cell-based immune therapy in cancer has been to generate durable clinical benefits for patients, paired with enhanced side effect profiles. The beneficial antitumoral activity of programmed death-1 (PD-1) and programmed death-ligand 1 (PD-L1) has been thoroughly demonstrated in certain metastatic malignancies (e.g. melanoma, non-small cell lung cancer, renal cell carcinoma); however, the therapeutic role in lymphoid cancers is complex...
May 2017: Critical Reviews in Oncology/hematology
https://www.readbyqxmd.com/read/28427520/lymphoblastic-lymphoma
#18
REVIEW
Sergio Cortelazzo, Andrés Ferreri, Dieter Hoelzer, Maurilio Ponzoni
Lymphoblastic lymphoma (LBL) is a neoplasm of immature B cells committed to the B-(B-LBL) or T-cell lineage (T-LBL) that accounts for approximately 2% of all lymphomas. Although histological features are usually sufficient to distinguish lymphoblastic from mature B- or T-cell neoplasms, of greater importance for diagnosis is the characterization of immunophenotype by flow cytometry. LBL occurs more commonly in children than in adults, mostly in males. A bone marrow involvement <25% (or 20% according to WHO) formally distinguishes LBL from ALL...
May 2017: Critical Reviews in Oncology/hematology
https://www.readbyqxmd.com/read/28427519/a-comprehensive-review-of-immunotherapies-in-prostate-cancer
#19
REVIEW
Manuel Caitano Maia, Aaron R Hansen
Prostate cancer is the second most common malignant neoplasm in men worldwide and the fifth cause of cancer-related death. Although multiple new agents have been approved for metastatic castration resistant prostate cancer over the last decade, it is still an incurable disease. New strategies to improve cancer control are needed and agents targeting the immune system have shown encouraging results in many tumor types. Despite being attractive for immunotherapies due to the expression of various tumor associated antigens, the microenvironment in prostate cancer is relatively immunosuppressive and may be responsible for the failures of various agents targeting the immune system in this disease...
May 2017: Critical Reviews in Oncology/hematology
https://www.readbyqxmd.com/read/28427458/whole-exome-sequencing-identifies-novel-candidate-predisposition-genes-for-familial-polycythemia-vera
#20
Elina A M Hirvonen, Esa Pitkänen, Kari Hemminki, Lauri A Aaltonen, Outi Kilpivaara
BACKGROUND: Polycythemia vera (PV), characterized by massive production of erythrocytes, is one of the myeloproliferative neoplasms. Most patients carry a somatic gain-of-function mutation in JAK2, c.1849G > T (p.Val617Phe), leading to constitutive activation of JAK-STAT signaling pathway. Familial clustering is also observed occasionally, but high-penetrance predisposition genes to PV have remained unidentified. RESULTS: We studied the predisposition to PV by exome sequencing (three cases) in a Finnish PV family with four patients...
April 20, 2017: Human Genomics
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