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thymic neoplasm

Yufeng Jiang, Yang Liu, Xiuying Shi, Xiaoyun Mao, Yang Zhao, Chuifeng Fan
BACKGROUND: Combined thymic carcinoma is a malignant neoplasm of the thymus recently added to the 4th edition of the World Health Organization (WHO) classification of tumors of the lung, pleura, thymus and heart. It involves at least one type of thymic carcinoma and another thymic epithelial tumor. The previously used term "combined thymic epithelial tumor" has been abandoned. CASE PRESENTATION: Here, we present an unusual case of combined thymic carcinoma of the thymus in a 44-year-old male who had suffered from fever, chest pain, chest tightness and shortness of breath...
January 17, 2017: Diagnostic Pathology
Angela Lopomo, Roberta Ricciardi, Michelangelo Maestri, Anna De Rosa, Franca Melfi, Marco Lucchi, Alfredo Mussi, Fabio Coppedè, Lucia Migliore
Thymomas are uncommon neoplasms that arise from epithelial cells of the thymus and are often associated with myasthenia gravis (MG), an autoimmune disease characterized by autoantibodies directed to different targets at the neuromuscular junction. Little is known, however, concerning epigenetic changes occurring in thymomas from MG individuals. To further address this issue, we analyzed DNA methylation levels of genes involved in one-carbon metabolism (MTHFR) and DNA methylation (DNMT1, DNMT3A, and DNMT3B) in blood, tumor tissue, and healthy thymic epithelial cells from MG patients that underwent a surgical resection of a thymic neoplasm...
December 16, 2016: International Journal of Molecular Sciences
Navid Omidifar, Maral Mokhtari, Mansoureh Shokripour
Thymoma, the most common neoplasm of the anterior mediastinum, is a rare tumor of thymic epithelium that can be locally invasive. We reported 2 cases of invasive thymoma incidentally found during routine coronary artery bypass graft (CABG) surgery at Faghihee Hospital of Shiraz University of Medical Sciences of Iran in a period of about 6 months. The 2 patients were male and above 60 years old. They had no clinical symptoms and radiological evidence of mediastinal mass before detection of the tumor during operation...
2016: Case Reports in Pathology
Zhengbo Song, Xinmin Yu, Yiping Zhang
OBJECTIVE: Thymic epithelial tumor (TET) is a rare mediastinal neoplasm and little is known about its genetic variability and prognostic factors. This study investigated the genetic variability and prognostic factors of TET. PATIENTS AND METHODS: We sequenced 22 cancer-related hotspot genes in TET tissues and matched normal tissues using Ampliseq Ion Torrent next-generation technology. Overall survival was evaluated using Kaplan-Meier methods and compared with log-rank tests...
2016: OncoTargets and Therapy
Priska Leisibach, Didier Schneiter, Alex Soltermann, Yoshi Yamada, Walter Weder, Wolfgang Jungraithmayr
BACKGROUND: Thymic epithelial tumors (TET) are rare neoplasms with inconsistent treatment strategies. When researching for molecular pathways to find new therapies, the correlation between specific molecular markers and outcome has only rarely been investigated. The aim of this study was to investigate the correlation between survival, metastatic potential and invasiveness of aggressive subtypes of TET and immunohistochemical markers. METHODS: Overall survival (OS), disease-free survival (DFS), progression-free survival (PFS) and metastasis-free survival (MFS) of patients with WHO type B2/B3 mixed type thymoma (MT), thymoma type B3 (B3) and thymic carcinoma (TC), undergoing surgery [1998-2013] were determined...
September 2016: Journal of Thoracic Disease
Ping Zhan, Xiao Chen, Xiao-Yuan Wu, Zhi-Bo Hou, Qian Qian, Yu Zhang, Jue Zou, Yuan-Qing Zhang, Ming-Yue Wan, Jian-Dong Wang, Li-Ke Yu, Hai-Yan Xie
INTRODUCTION: For thymic carcinoma (TC), which is a rare epithelial neoplasm of the thymus gland, median survival with current treatments is only 2 years. OBJECTIVES: Mutations in the epidermal growth factor receptor (EGFR) gene or its downstream effectors may cause constitutive activation that leads to cell proliferation and metastases. Thus, molecular profiling is essential for selecting TC patients who may respond to anti-EGFR therapies. METHODS: Genomic DNA was extracted from 61 histological samples of TCs...
October 12, 2016: Clinical Respiratory Journal
Christine E Cutucache, Tyler A Herek
Currently, there are 19 different peripheral T-cell lymphoma (PTCL) entities recognized by the World Health Organization; however, ~70% of PTCL diagnoses fall within one of three subtypes [i.e., peripheral T-cell lymphoma not otherwise specified (PTCL-NOS), anaplastic large-cell lymphoma, and angioimmunoblastic T-cell lymphoma]. PTCL-NOS is a grouping of extra-thymic neoplasms that represent a challenging and heterogeneous subset of non-Hodgkin's lymphomas. Research into peripheral T-cell lymphomas has been cumbersome as the lack of defining cytogenetic, histological, and molecular features has stymied diagnosis and treatment of these diseases...
2016: Frontiers in Oncology
Borislav A Alexiev, Anjana V Yeldandi
Ectopic pleural thymoma is an exceedingly uncommon clinical entity that has only been described sporadically. Because of their peculiar location and variety of histologic patterns manifested, pleural thymomas may be confused with other neoplasms and may cause diagnostic problems clinically, radiologically, and morphologically. We describe the case of a giant left-sided ectopic pleural thymoma, preoperatively suspected to be a solitary fibrous tumor. A complete surgical resection was achieved and a postoperative diagnosis of WHO Type AB, modified Masaoka stage I tumor was attained...
November 2016: Pathology, Research and Practice
David Altree-Tacha, Jillian Tyrrell, Faqian Li
Context .- High-grade neuroendocrine carcinomas and carcinoids can arise in different sites such as lung, gastrointestinal tract, prostate, and skin. Classic neuroendocrine markers such as CD56, synaptophysin, and chromogranin cannot distinguish carcinoids from high-grade neuroendocrine carcinomas. Recently, mouse monoclonal mASH1 has been shown to help discriminate carcinoids from high-grade neuroendocrine carcinomas in various neoplastic sites. To date, there have been no comprehensive immunohistochemistry studies with mASH1 on nonneuroendocrine neoplasms...
September 15, 2016: Archives of Pathology & Laboratory Medicine
Filippo Lococo, Gianluigi Bajocchi, Andrea Caruso, Riccardo Valli, Tommaso Ricchetti, Giorgio Sgarbi, Carlo Salvarani
BACKGROUND: Thymoma is a T cell neoplasm arising from the thymic epithelium that due to its immunological role, frequently undercover derangements of immunity such a tumors and autoimmune diseases. METHODS: Herein, we report, to the best of our knowledge, the first description of an association between thymoma and adult onset Still disease (AOSD) in a 47-year-old man. The first one was occasionally detected 4 years later the diagnosis of AOSD, and surgically removed via right lateral thoracotomy...
September 2016: Medicine (Baltimore)
T T Win, Z Kamaludin, A Husin
Primary mediastinal large B-cell lymphoma (PMLBL) is an uncommon non-Hodgkin lymphoma with a distinct clinicopathological entity in the WHO classification of lymphoid malignancies. It is known to originate from B-cells of the thymus. It mimics thymic neoplasms and other lymphomas clinically and histopathologically. We reported a 33-year-old obese man who presented with shortness of breath off and on for 4 years. Radiologically, there was a huge anterior mediastinal mass. Tru-cut biopsy was initially diagnosed as type-A thymoma...
August 2016: Malaysian Journal of Pathology
L Brcic, M Heidinger, H Popper
Primary neuroendocrine tumors (NET) in the mediastinum are very rare and among them thymic NETs are the most common. They represent 5 % of all thymic and mediastinal tumors. The WHO classification from 2015 subdivides thymic NETs into three groups; low grade (typical carcinoid), intermediate grade (atypical carcinoid) and high grade (large cell neuroendocrine carcinoma and small cell carcinoma). Through this change of mediastinal/thymic NET classification into three groups of malignancy, the nomenclature was adapted to that of the lungs, while the histological criteria for each entity remained the same...
September 2016: Der Pathologe
Min Yu, Yuan Meng, Bin Xu, Lin Zhao, Qingfu Zhang
Micronodular thymoma (MNT) with lymphoid stroma is a rare thymic epithelial neoplasm with the characteristics of multiple nodules separated by abundant lymphoid stroma. MNTs mainly arise in the anterior mediastinum and thymus, while ectopic MNTs are extremely rarely seen. Here, we report an ectopic MNT that occurred in the neck of a 62-year-old woman. There were also scattered eosinophilic granulocytes and S100(+)/CD1a(+) Langerhans cells within the tumor. This case provides a better understanding of such rare, poorly understood cases...
2016: OncoTargets and Therapy
A Tzankov
The mediastinum is a complex body region of limited space but containing numerous organs of different embryonic origins. A variety of lesions that are difficult to distinguish from each other can occur here. Non-neoplastic lesions of the mediastinum represent important differential diagnostic pitfalls to mediastinal tumors, clinically, radiologically and histopathologically. It is important to bear these lesions in mind and to adequately verify or exclude them before starting further differential diagnostic considerations on mediastinal neoplasms...
September 2016: Der Pathologe
Mark R Wick
Dr. Juan Rosai is one of the most prolific contributors to the literature on mediastinal pathology, and he has added steadily to that body of work over a 50-year period. Rosai has written several landmark articles in this topical area, including articles on thymic epithelial lesions, mediastinal neuroendocrine tumors, mediastinal lymphoma and other hematopoietic lesions, thymolipoma, thymoliposarcoma, mediastinal solitary fibrous tumor, intrathymic langerhans-cell histiocytosis, mediastinal germ cell neoplasms, and multilocular thymic cyst...
September 2016: Seminars in Diagnostic Pathology
Annikka Weissferdt, Neda Kalhor, Fredrik Petersson, Cesar A Moran
Nine cases of ectopic hamartomatous thymoma are described. The patients were 5 men and 4 women aged 34 to 52 years (mean, 43 y). All patients presented with solitary lower neck masses ranging in size from 3.5 to 8.0 cm (mean, 5.4 cm). Grossly, the lesions were circumscribed and lobulated masses with a fleshy white cut surface; cystic changes were identified in 3 cases. Histologically, the tumors were composed of varying proportions of spindle cells arranged in fascicles, mature adipose tissue, and an epithelial component composed of squamoid elements and glandular or ductal structures...
November 2016: American Journal of Surgical Pathology
Yoko Karube, Satoru Kobayashi, Sumiko Maeda, Tetsu Sado, Hiromi Ishihama, Masayuki Chida
BACKGROUND: Thymic carcinoma (TC) is a rare type of malignant neoplasm that develops in the anterior mediastinum and associated with poor prognosis. Type B3 thymoma (B3) occasionally demonstrates malignant tumor characteristics, especially in the advanced stage. We investigated the expressions of tumor-related genes in resected TC and B3 specimens. METHODS: TC and B3 specimens resected from 1999 through 2012 were investigated. Tumor segments were collected from the specimens by micro-dissection to extract mRNA, then RT-PCR was performed according to Dannenberg's tumor profile method for semi-quantitation of tumor-related gene mRNA...
May 26, 2016: Journal of Cardiothoracic Surgery
Mohamed K Kamel, Brendon M Stiles, Galal Ghaly, Mohamed Rahouma, Abu Nasar, Jeffrey L Port, Paul C Lee, Nasser K Altorki
BACKGROUND: In patients with thymic neoplasms, the pleural space is a frequent site of either synchronous or metachronous tumor dissemination after surgical resection. The objective of this study was to identify factors that predict pleural dissemination, which would allow for better surgical planning and consideration of novel adjuvant or surveillance strategies. METHODS: A retrospective review of a prospective database (2000 to 2014) was performed to identify patients with thymic tumors (excluding neuroendocrine)...
June 18, 2016: Annals of Thoracic Surgery
Monica Bellei, Elena Sabattini, Emanuela Anna Pesce, Young-Hyeh Ko, Won Seog Kim, Maria Elena Cabrera, Virginia Martinez, Ivan Dlouhy, Roberto Pinto Paes, Tomas Barrese, Josè Vassallo, Vittoria Tarantino, Julie Vose, Dennis Weisenburger, Thomas Rüdiger, Massimo Federico, Stefano Pileri
Peripheral T-cell lymphomas (PTCLs) comprise a heterogeneous group of neoplasms that are derived from post-thymic lymphoid cells at different stages of differentiation with different morphological patterns, phenotypes and clinical presentations. PTCLs are highly diverse, reflecting the diverse cells from which they can originate and are currently sub-classified using World Health Organization (WHO) 2008 criteria. In 2006 the International T-Cell Lymphoma Project launched the T-Cell Project, building on the retrospective study previously carried on by the network, with the aim to prospectively collect accurate data to improve knowledge on this group of lymphomas...
June 3, 2016: Hematological Oncology
Yulong Li, William F Simonds
Familial syndromes of hyperparathyroidism, including multiple endocrine neoplasia type 1 (MEN1), multiple endocrine neoplasia type 2A (MEN2A), and the hyperparathyroidism-jaw tumor (HPT-JT), comprise 2-5% of primary hyperparathyroidism cases. Familial syndromes of hyperparathyroidism are also associated with a range of endocrine and nonendocrine tumors, including potential malignancies. Complications of the associated neoplasms are the major causes of morbidities and mortalities in these familial syndromes, e...
June 2015: Endocrine-related Cancer
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