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https://www.readbyqxmd.com/read/29250683/hemorrhagic-polypoid-gastric-and-colonic-metastases-nine-years-after-uterine-leiomyosarcoma-case-report
#1
Nicoleta Puie, Lavinia Patricia Trică, Georgiana Anca Nagy, Ioana Rusu, Alina Simona Şovrea, Carmen Georgiu
INTRODUCTION: Uterine leiomyosarcoma (ULMS) is a rare tumor, representing 1-2% of all uterine malignancies. It is highly aggressive, with high metastatic rate, especially in lungs, peritoneal cavity, retroperitoneum, bones and liver, usually during the first years after diagnosis. CASE PRESENTATION: A 58-year-old woman, with subtotal hysterectomy and bilateral adnexectomy, followed by radiochemotherapy for spindle-type ULMS nine years ago, presented with gastrointestinal bleeding and severe anemia...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/29245294/gastrointestinal-stromal-tumor-of-unusual-phenotype-after-imatinib-treatment-a-case-report-and-diagnostic-utility-of-etv1-mrna-in-situ-hybridization
#2
Minsun Jung, Sung-Hye Park, Yoon Kyung Jeon, Jae-Kyung Won, Han-Kwang Yang, Woo Ho Kim
RATIONALE: Gastrointestinal stromal tumor (GIST) is the most common tumor of mesenchymal origin in gastrointestinal tract. Immunohistochemical (IHC) staining combined with a typical morphology is used for the diagnosis of GIST. Typically, IHC staining for v-kit Hardy-Zuckerman 4 feline sarcoma viral oncogene (KIT) and discovered on GIST-1(DOG1) is positive in almost all GISTs. However, imatinib mesylate, a specific inhibitor of KIT tyrosine kinase, frequently involves changes in the morphology and IHC staining of GIST, impeding the diagnosis...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29239034/succinate-dehydrogenase-sdh-deficient-neoplasia
#3
REVIEW
Anthony J Gill
The succinate dehydrogenase (SDH) complex is a key respiratory enzyme composed of four subunits: SDHA, SDHB, SDHC and SDHD. Remarkably, immunohistochemistry for SDHB becomes negative whenever there is bi-alleic inactivation of any component of SDH, which is very rare in the absence of syndromic disease. Therefore, loss of SDHB immunohistochemistry serves as a marker of syndromic disease, usually germline mutation of one of the SDH subunits. Tumours which show loss of SDHB expression are termed succinate dehydrogenase-deficient...
January 2018: Histopathology
https://www.readbyqxmd.com/read/29237476/giant-gastrointestinal-stromal-tumor-with-predominantly-cystic-changes-a-case-report-and-literature-review
#4
Liying Wang, Libin Liu, Zhaohui Liu, Yueli Tian, Zhe Lin
BACKGROUND: Gastrointestinal stromal tumors (GISTs) rarely present with predominantly cystic changes. Here, we report a case of giant GIST of the stomach with predominantly cystic changes in a 74-year-old female patient. CASE PRESENTATION: The tumor was 10 cm × 15 cm in size and positive for CD117, H-caldesmon, and DOG-1. Complete surgical resection was performed without regional lymphadenectomy. The patient recovered uneventfully and no recurrence occurred...
December 13, 2017: World Journal of Surgical Oncology
https://www.readbyqxmd.com/read/29189258/the-use-of-smoothelin-and-other-antibodies-in-the-diagnosis-of-uterine-and-soft-tissue-smooth-muscle-tumors
#5
Kim Greg Mayhall, Estelle Oertling, Eleanor Lewin, John Schmieg, Helena LeBeau, Tong Wu, Byron Crawford
Smoothelin is a cytoplasmic protein expressed in differentiated smooth muscle cells. Immunohistochemical evaluation of smoothelin has previously been reported in gastrointestinal (GI) smooth muscle tumors, but has yet to be studied in smooth muscle tumors of uterine and other soft tissue origin. DOG1 expression is reported to be specific for GI stromal tumors; however, variable expression has been reported in leiomyosarcomas (LMS) depending on site of origin. Overexpression of p16 is common in LMS of uterine and other sites of origin, but has not been correlated with tumor grade...
November 20, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/29139127/combined-transcriptome-and-translatome-analyses-reveal-a-role-for-tryptophan-dependent-auxin-biosynthesis-in-the-control-of-dog1-dependent-seed-dormancy
#6
Bing Bai, Ondřej Novák, Karin Ljung, Johannes Hanson, Leónie Bentsink
The importance of translational regulation during Arabidopsis seed germination has been shown previously. Here the role of transcriptional and translational regulation during seed imbibition of the very dormant DELAY OF GERMINATION 1 (DOG1) near-isogenic line was investigated. Polysome profiling was performed on dormant and after-ripened seeds imbibed for 6 and 24 h in water and in the transcription inhibitor cordycepin. Transcriptome and translatome changes were investigated. Ribosomal profiles of after-ripened seeds imbibed in cordycepin mimic those of dormant seeds...
November 15, 2017: New Phytologist
https://www.readbyqxmd.com/read/29030481/antisense-transcription-represses-arabidopsis-seed-dormancy-qtl-dog1-to-regulate-drought-tolerance
#7
Ruslan Yatusevich, Halina Fedak, Arkadiusz Ciesielski, Katarzyna Krzyczmonik, Anna Kulik, Grazyna Dobrowolska, Szymon Swiezewski
Plants have developed multiple strategies to sense the external environment and to adapt growth accordingly. Delay of germination 1 (DOG1) is a major quantitative trait locus (QTL) for seed dormancy strength in Arabidopsis thaliana that is reported to be expressed exclusively in seeds. DOG1 is extensively regulated, with an antisense transcript (asDOG1) suppressing its expression in seeds. Here, we show that asDOG1 shows high levels in mature plants where it suppresses DOG1 expression under standard growth conditions...
October 13, 2017: EMBO Reports
https://www.readbyqxmd.com/read/29018259/clinicopathological-and-molecular-characteristics-of-synchronous-gastric-adenocarcinoma-and-gastrointestinal-stromal-tumors
#8
Jun-Ming Luo, Fa-Long Cao, Chen Meng, Li-Jun Lin, Si-Qing Ma, Shao-Hua Peng, Hong-Ling Gao, Sara Javidiparsijani, Gui-Rong Wang, Meng-Lan Zhang, Jian-Guo Xin, Yi-Chun Wang, Shu-Kun Zhang
Synchronous gastric tumors that consist of both gastrointestinal stromal tumor (GIST) and adenocarcinoma are rare. We studied the clinicopathological and molecular characteristics of six cases containing both gastric adenocarcinoma and GIST. By means of immunohistochemical analysis, all GIST cells expressed CD117, CD34 and Dog1 in all six synchronous gastric adenocarcinomas with GIST, and in GIST alone. Sequencing analysis demonstrated that exon 11 c-kit mutations were present in two of six synchronous tumors and four of five GISTs...
October 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28965630/expression-of-dog1-in-low-grade-fibromyxoid-sarcoma-a-study-of-19-cases-and-review-of-the-literature
#9
Ana Vallejo-Benítez, Enrique Rodríguez-Zarco, Sara Pabón Carrasco, Sofia Pereira-Gallardo, Javier Brugal Molina, Antonio García-Escudero, Antonio Robles Frías, David Marcilla, Ricardo González-Cámpora
DOG1 is a highly-sensitive marker often included in the immunohistochemical panel for the diagnosis of gastrointestinal stromal tumors (GISTs). Recent research has shown that DOG1 may also be expressed by low-grade fibromyxoid sarcomas (LGFMSs); this may give rise to diagnostic error when the sarcoma is located in the abdominal cavity. This paper reports on immnohistochemical expression of DOG1 in 19 LGFMSs using two different monoclonal antibodies: K9 (Leica, Novocastra Laboratories, Newcastle upon Tyne, UK) and SP31 (Thermo Scientific, Freemont, USA)...
October 2017: Annals of Diagnostic Pathology
https://www.readbyqxmd.com/read/28941290/physiological-and-molecular-mechanisms-underlying-the-integration-of-light-and-temperature-cues-in-arabidopsis-thaliana-seeds
#10
María Verónica Arana, Rocío Soledad Tognacca, Maximiliano Estravis-Barcalá, Rodolfo Augusto Sánchez, Javier Francisco Botto
The relief of dormancy and the promotion of seed germination are of extreme importance for a successful seedling establishment. Although alternating temperatures and light are signals promoting the relief of seed dormancy, the underlying mechanisms of their interaction in seeds are scarcely known. By exposing imbibed Arabidopsis thaliana dormant seeds to two-day temperature cycles previous of a red light pulse, we demonstrate that the germination mediated by phytochrome B requires the presence of functional PSEUDO-RESPONSE REGULATOR 7 (PRR7) and TIMING OF CAB EXPRESSION 1 (TOC1) alleles...
September 23, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28883708/rarity-among-benign-gastric-tumors-plexiform-fibromyxoma-report-of-two-cases
#11
Kinga Szurian, Holger Till, Eva Amerstorfer, Nicole Hinteregger, Hans-Jörg Mischinger, Bernadette Liegl-Atzwanger, Iva Brcic
Plexiform fibromyxoma is a very rare mesenchymal tumor of the stomach, found almost exclusively in the antrum/pylorus region. The most common presenting symptoms are anemia, hematemesis, nausea and unintentional weight loss, without sex or age predilection. We describe here two cases of plexiform fibromyxoma, involving a 16-year-old female and a 34-year-old male. Both patients underwent complete resection (R0) by distal gastrectomy and retrocolic gastrojejunostomy (according to Billroth 2); for both, the postoperative course was uneventful...
August 21, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28825581/-gastrointestinal-stromal-tumor-and-renal-transplant
#12
Carina E Seculini Patiño, Aldo H Tabares, Maria V Laborie, Ana Diller
Gastrointestinal stromal tumor (GIST) accounts for nearly 1% of all gastrointestinal tumors. Its association with renal transplantation is not frequent. Approximately 95% of GIST show staining for CD177. DOG1 is a recently described monoclonal antibody that shows positivity even in the absence of CD177 staining. The diagnosis of GIST should be pursued because of the availability of very effective treatments with tyrosine-kinase inhibitors. Herein, we describe the case of a woman with renal transplant who presented a small bowel GIST and weak positivity for CD177, treated initially with surgery...
2017: Medicina
https://www.readbyqxmd.com/read/28820749/surgical-pathology-of-gastrointestinal-stromal-tumors-practical-implications-of-morphologic-and-molecular-heterogeneity-for-precision-medicine
#13
Gregory W Charville, Teri A Longacre
Gastrointestinal stromal tumor (GIST), the most common mesenchymal neoplasm of the gastrointestinal tract, exhibits diverse histologic and clinical manifestations. With its putative origin in the gastrointestinal pacemaker cell of Cajal, GIST can arise in association with any portion of the tubular gastrointestinal tract. Morphologically, GISTs are classified as spindled or epithelioid, though each of these subtypes encompasses a broad spectrum of microscopic appearances, many of which mimic other histologic entities...
November 2017: Advances in Anatomic Pathology
https://www.readbyqxmd.com/read/28799152/-gastric-schwannoma-rare-differenzial-diagnosis-of-acute-upper-gastrointestinal-gi-bleeding
#14
Orestis Lyros, Stephan Schickel, Katrin Schierle, Albrecht Hoffmeister, Ines Gockel
Schwannomas are benign tumors derived from Schwann cells and their typical site of origin is the subcutaneous tissue of the extremities. Gastrointestinal localization of Schwannomas is extremely rare and the stomach is the prevalent site. Gastric schwannomas primarily occur in the gastric submucosa and are usually asymptomatic.We present a rare case of a solitary gastric schwannoma in a 51-year old male, which initially manifested with hematemesis by acute upper gastrointestinal (GI) bleeding. The upper GI-Endoscopy revealed a gastric submucosal tumor, 7 cm in size, located in the proximal corpus and fundus...
August 2017: Zeitschrift Für Gastroenterologie
https://www.readbyqxmd.com/read/28781197/clinicopathologic-and-molecular-characterization-of-mammary-analogue-secretory-carcinoma-of-salivary-gland-origin
#15
F Baghai, F Yazdani, A Etebarian, A Garajei, A Skalova
BACKGROUND: Mammary analogue secretory carcinoma (MASC) is a newly recognized salivary gland tumor that harbors a characteristic balanced chromosomal translocation t (12; 15) (p13; q25) resulting in an ETV6-NTRK3 fusion gene. METHODS: Retrospective study of 111 salivary gland carcinomas revealed 37 cases with secretory features and growth patterns resembling secretory carcinoma of breast. These 37 cases were originally diagnosed as acinic cell carcinoma, adenocarcinoma not otherwise specified and cystadenocarcinoma...
July 23, 2017: Pathology, Research and Practice
https://www.readbyqxmd.com/read/28770581/the-phd-containing-protein-early-bolting-in-short-days-regulates-seed-dormancy-in-arabidopsis
#16
Laura Narro-Diego, Leticia López-González, Jose A Jarillo, Manuel Piñeiro
The Arabidopsis protein EARLY BOLTING IN SHORT DAYS (EBS), a plant-specific transcriptional regulator, is involved in the control of flowering time by repressing the floral integrator FT. The EBS protein binds the H3K4me3 histone mark and interacts with histone deacetylases to modulate gene expression. Here, we show that EBS also participates in the regulation of seed dormancy. ebs mutations cause a reduction in seed dormancy, and the concurrent loss of function of the EBS homologue SHORT LIFE (SHL) enhances this dormancy alteration...
August 2, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28719468/etv6-gene-rearrangements-characterize-a-morphologically-distinct-subset-of-sinonasal-low-grade-non-intestinal-type-adenocarcinoma-a-novel-translocation-associated-carcinoma-restricted-to-the-sinonasal-tract
#17
Simon Andreasen, Alena Skálová, Abbas Agaimy, Justin A Bishop, Jan Laco, Ilmo Leivo, Alessandro Franchi, Stine R Larsen, Daiva Erentaite, Benedicte P Ulhøi, Christian von Buchwald, Linea C Melchior, Michal Michal, Katalin Kiss
Low-grade sinonasal adenocarcinomas (low-grade SNACs) of the sinonasal tract comprise a poorly characterized and histologically heterogeneous group of tumors. We describe three cases of a histologically distinct variant of low-grade SNAC characterized by ETV6 gene rearrangements. The patients included 2 women (aged 32 and 88 y) and a man (aged 75 y); all were initially treated with surgery alone. Follow-up ranged from 9 to 170 months with one patient having 2 local recurrences and none experiencing distant or regional metastases...
November 2017: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28706187/delay-of-germination1-requires-pp2c-phosphatases-of-the-aba-signalling-pathway-to-control-seed-dormancy
#18
Guillaume Née, Katharina Kramer, Kazumi Nakabayashi, Bingjian Yuan, Yong Xiang, Emma Miatton, Iris Finkemeier, Wim J J Soppe
The time of seed germination is a major decision point in the life of plants determining future growth and development. This timing is controlled by seed dormancy, which prevents germination under favourable conditions. The plant hormone abscisic acid (ABA) and the protein DELAY OF GERMINATION 1 (DOG1) are essential regulators of dormancy. The function of ABA in dormancy is rather well understood, but the role of DOG1 is still unknown. Here, we describe four phosphatases that interact with DOG1 in seeds. Two of them belong to clade A of type 2C protein phosphatases: ABA-HYPERSENSITIVE GERMINATION 1 (AHG1) and AHG3...
July 13, 2017: Nature Communications
https://www.readbyqxmd.com/read/28614212/phosphaturic-mesenchymal-tumors-clinicopathologic-immunohistochemical-and-molecular-analysis-of-22-cases-expanding-their-morphologic-and-immunophenotypic-spectrum
#19
Abbas Agaimy, Michael Michal, Simion Chiosea, Fredrik Petersson, Ladislav Hadravsky, Glenn Kristiansen, Raymund E Horch, Jan Schmolders, Arndt Hartmann, Florian Haller, Michal Michal
Phosphaturic mesenchymal tumor (PMT) is a rare neoplasm of uncertain histogenesis that has been linked to tumor-induced osteomalacia (TIO) since 1959. The neoplastic cells produce increased amount of FGF23 which results in TIO via uncontrolled renal loss of phosphate (phosphaturia), and consequently diminished bone mineralization. To date, ∼300 cases have been reported. Although there is increasing evidence that PMT can be diagnosed by reproducible histopathologic features, firm diagnosis has been often restricted to cases associated with TIO and, hence, diagnosis of "nonphosphaturic variants" remained challenging...
October 2017: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28557595/chondroblastoma-an-update
#20
REVIEW
Wenqian Chen, Lisa M DiFrancesco
Chondroblastoma is a rare primary bone tumor of young people that typically arises in the ends of the long bones. Radiologic investigations show a small, circumscribed, lytic lesion. The tumor is characterized histologically by the proliferation of chondroblasts along with areas of mature cartilage, giant cells, and occasionally, secondary aneurysmal bone cyst formation. Chondroblastoma, however, may also present with atypical features, such as prominent hemosiderin deposition, numerous giant cells, or the presence of a large aneurysmal bone cyst component...
June 2017: Archives of Pathology & Laboratory Medicine
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