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https://www.readbyqxmd.com/read/29344489/caruncular-oncocytoma-mimicking-malignant-melanoma
#1
Thamolwan Surakiatchanukul, Kareem Sioufi, Renelle Pointdujour-Lim, Ralph C Eagle, Jerry A Shields, Carol L Shields
Purpose: To report a case of pigmented caruncular oncocytoma that simulated malignant melanoma and discuss the associated ultrasonographic and pathologic features. Method: Case report. Results: An 81-year-old female presented with a painless caruncular mass with a smooth brown surface suspicious for melanoma. Ultrasound biomicroscopy revealed a round mass with a large central cavity, more suggestive of a cystic rather than solid lesion. Following complete surgical resection, histopathology revealed a cystadenomatous lesion composed of bland cells with copious eosinophilic cytoplasm consistent with oncocytoma that had a central blood-filled cavity...
November 2017: Ocular Oncology and Pathology
https://www.readbyqxmd.com/read/29343920/extrarenal-retroperitoneal-angiomyolipoma-with-oncocytoma
#2
Amir Mahmud Ali, Syed Jamal Rizvi, Kamal V Kanodia
The simultaneous presence of renal angiomyolipoma and oncocytoma is a rare occurrence. Extrarenal retroperitoneal angiomyolipoma is an even more rare neoplasm, and its simultaneous presence with renal oncocytoma has not been documented. We present herein the first case to be reported in English literature.
January 2018: Indian Journal of Urology: IJU: Journal of the Urological Society of India
https://www.readbyqxmd.com/read/29327532/adrenal-oncocytoma-a-rare-functional-tumor-presenting-as-cushing-syndrome
#3
Hozefa Runderawala, Samrat Shah, Abizer Manked
Adrenal oncocytoma is very rare pathological variant of adrenal neoplasm. These are usually large and non-functional; however, rarely functional adrenal oncocytomas are also presented as Cushing's syndrome and pheochromocytoma. We report a case of adrenal oncocytoma in 38 year old female presented with symptoms of Cushing Syndrome.
December 2017: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/29319547/the-role-of-molecular-imaging-in-the-characterization-of-renal-masses
#4
Alexa R Meyer, Mohamad E Allaf, Steven P Rowe, Michael A Gorin
PURPOSE OF REVIEW: To explore the role of molecular imaging in the characterization of renal masses. RECENT FINDINGS: Incidentally detected renal masses exhibit variable malignant potential related to their underlying histology. Patients presenting with a renal mass should undergo individual risk stratification including characterization of their tumor histology. At the present time, anatomical imaging techniques are unable to reliably distinguish between the various renal tumor subtypes...
January 11, 2018: Current Opinion in Urology
https://www.readbyqxmd.com/read/29310387/renal-hybrid-oncocytic-chromophobe-tumor-associated-with-multiple-schwannomas-case-report-and-literature-review
#5
Guanghua Liu, Yatong Li, Zhuoran Li, Jingmin Zhou, Zhen Huo, Zhigang Ji
RATIONALE: Renal hybrid oncocytic/chromophobe tumors (HOCTs) are benign tumors containing a mixture of cells with features of chromophobe renal cell carcinoma (CHRCC) and renal oncocytoma (RO). Sporadic HOCT, which means HOCT occurs in patients without Birt-Hogg-Dubé syndrome (BHDS) or renal oncocytosis, is extremely rare. In this article, we would report a new case of a patient with both sporadic HOCT and multiple Schwannomas, which is even rarer than simplex sporadic HOCT. PATIENT CONCERNS: A 48-year-old female was noted with multiple left-kidney masses and a history of multiple Schwannomas...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29310349/adrenocortical-oncocytoma-11-case-reports-and-review-of-the-literature
#6
Yazhao Hong, Yuanyuan Hao, Jinghai Hu, Bo Xu, Hongli Shan, Xiaoqing Wang
RATIONALE: Adrenocortical oncocytoma is an extremely rare tumor of the adrenal gland. Its diagnostic criteria and biological behavior has not yet reached a consensus. The purpose of this study is to investigate the clinical characteristics of adrenocortical oncocytoma. PATIENT CONCERNS: The clinical data from 11 cases of adrenocortical oncocytoma were retrospectively analyzed. Five patients found the tumor incidentally during the healthy examination, and 3 cases found the tumor during the diagnostic work-up for the evaluation of flank pain or hypertension...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29310179/re-surgical-histopathology-for-suspected-oncocytoma-on-renal-mass-biopsy-a-systematic-review-and-meta-analysis
#7
M Pilar Laguna
No abstract text is available yet for this article.
January 2018: Journal of Urology
https://www.readbyqxmd.com/read/29305199/quantitative-contour-analysis-as-an-image-based-discriminator-between-benign-and-malignant-renal-tumors
#8
Felix Y Yap, Darryl H Hwang, Steven Y Cen, Bino A Varghese, Bhushan Desai, Brian D Quinn, Megha Nayyar Gupta, Nieroshan Rajarubendra, Mihir M Desai, Manju Aron, Gangning Liang, Monish Aron, Inderbir S Gill, Vinay A Duddalwar
OBJECTIVES: To investigate whether morphologic analysis can differentiate benign versus malignant renal tumors on clinically acquired imaging. METHODS: Between 2009 and 2014, 3D tumor volumes were manually segmented from contrast-enhanced computerized tomography (CT) images from 150 patients with predominantly solid, non-macroscopic fat-containing renal tumors: 100 renal cell carcinomas (RCC) and 50 benign lesions (e.g. oncocytoma, lipid-poor angiomyolipoma). Tessellated 3D tumor models were created from segmented voxels using MATLAB code...
January 2, 2018: Urology
https://www.readbyqxmd.com/read/29299091/oncocytoma-a-differential-consideration-for-an-incidentally-detected-fdg-avid-renal-mass-on-pet-ct
#9
Christopher J Smith, Mindy X Wang, Michael Feely, Brandon Otto, Joseph R Grajo
Renal oncocytoma is a benign renal neoplasm that is often discovered incidentally and closely mimics renal cell carcinoma on common imaging modalities such as computed tomography (CT) and magnetic resonance imaging (MRI). Due to the inability to reliably distinguish between these benign and malignant lesions with imaging, both are typically treated as if they are malignant. Hypermetabolic activity of renal oncocytomas is not frequently encountered because positron emission tomography (PET) is not a standard modality for imaging primary renal tumors...
May 2017: Journal of Radiology Case Reports
https://www.readbyqxmd.com/read/29288785/robotic-assisted-laparoscopic-partial-nephrectomy-in-a-horseshoe-kidney-a-case-report-and-review-of-the-literature
#10
Avi Raman, Teele Kuusk, Eoin R Hyde, Lorenz U Berger, Axel Bex, Faiz Mumtaz
OBJECTIVE: To review the literature and present a case of robotic-assisted laparoscopic partial nephrectomies in horseshoe kidney. METHODS: We describe a case of a right side oncocytoma in a horseshoe kidney managed robotically and review the literature of robotic-assisted laparoscopic surgical resection of kidney tumors in renal fusion anomalies. RESULTS: There are only 3 published cases of robotic-assisted laparoscopic partial nephrectomy (RAPN) for renal tumours in a horseshoe kidney in the literature...
December 27, 2017: Urology
https://www.readbyqxmd.com/read/29285300/renal-oncocytoma-characterized-by-the-defective-complex-i-of-the-respiratory-chain-boosts-the-synthesis-of-the-ros-scavenger-glutathione
#11
Gerrit Kürschner, Qingzhou Zhang, Rosanna Clima, Yi Xiao, Jonas Felix Busch, Ergin Kilic, Klaus Jung, Nikolaus Berndt, Sascha Bulik, Hermann-Georg Holzhütter, Giuseppe Gasparre, Marcella Attimonelli, Mohan Babu, David Meierhofer
Renal oncocytomas are rare benign tumors of the kidney and characterized by a deficient complex I (CI) enzyme activity of the oxidative phosphorylation (OXPHOS) system caused by mitochondrial DNA (mtDNA) mutations. Yet, little is known about the underlying molecular mechanisms and alterations of metabolic pathways in this tumor. We compared renal oncocytomas with adjacent matched normal kidney tissues on a global scale by multi-omics approaches, including whole exome sequencing (WES), proteomics, metabolomics, and metabolic pathway simulation...
December 1, 2017: Oncotarget
https://www.readbyqxmd.com/read/29239033/what-s-new-in-pituitary-pathology
#12
REVIEW
Sylvia L Asa, Ozgur Mete
The increasing recognition of pituitary disorders and their impact on quality of life and longevity has made understanding of this small gland a subject of paramount importance. Pituitary pathology has seen many significant studies that indicate progress in identification and classification of pituitary lesions, as well as improved management strategies for patients. In this review, we outline six major areas of advances: (i) changes in terminology from 'adenoma' to 'pituitary neuroendocrine tumour'; (ii) reclassification of hormone-negative tumours based on transcription factor expression that defines lineage; (iii) updates in new pathogenetic mechanisms, including those that underlie rare lesions such as X-LAG and pituitary blastoma; (iv) clarification of hypophysitis due to immunotherapy, xanthomatous hypophysitis due to rupture of a Rathke's cleft cyst and IgG4 disease as the cause of inflammatory pseudotumour; (v) the consolidation of pituicytoma variants, including spindle cell oncocytoma and granular cell tumour based on thyroid transcription factor-1 (TTF-1) reactivity; and (vi) the pathogenetic mechanisms that distinguish papillary from adamantinomatous craniopharyngioma...
January 2018: Histopathology
https://www.readbyqxmd.com/read/29237344/epithelial-myoepithelial-carcinoma-of-the-nasal-cavity-clinical-histopathological-and-immunohistochemical-distinction-of-a-case-report
#13
Sally Nguyen, Marjorie Perron, Sylvie Nadeau, Alexandre Nakao Odashiro, Marie-Noëlle Corriveau
BACKGROUND: Epithelial myoepithelial carcinomas (EMCs) are rare low-grade salivary gland tumors. Here, we report the case of a 75-year-old man presenting with an oncocytic variant of EMC of the nasal cavity, initially diagnosed as an oncocytoma. METHODS: Our patient underwent functional sinus surgery in 2012. On pathology, an oncocytic neoplasm was found in the right nasal cavity, characterized by fragments of uniform bland oncocytic cells with bilayered arrangement of nuclei...
December 1, 2017: International Journal of Surgical Pathology
https://www.readbyqxmd.com/read/29219617/exploring-multiphoton-microscopy-as-a-novel-tool-to-differentiate-chromophobe-renal-cell-carcinoma-from-oncocytoma-in-fixed-tissue-sections
#14
Manu Jain, Brian D Robinson, Binlin Wu, Francesca Khani, Sushmita Mukherjee
CONTEXT: - Distinguishing chromophobe renal cell carcinoma (chRCC), especially in the presence of eosinophilic cytoplasm, from oncocytoma on hematoxylin-eosin can be difficult and often requires time-consuming ancillary procedures that ultimately may not be informative. OBJECTIVE: - To explore the potential of multiphoton microscopy (MPM) as an alternative and rapid diagnostic tool in differentiating oncocytoma from chRCC at subcellular resolution without tissue processing...
December 8, 2017: Archives of Pathology & Laboratory Medicine
https://www.readbyqxmd.com/read/29214562/use-of-quantitative-spect-ct-reconstruction-in-99mtc-sestamibi-imaging-of-patients-with-renal-masses
#15
Krystyna M Jones, Lilja B Solnes, Steven P Rowe, Michael A Gorin, Sara Sheikhbahaei, George Fung, Eric C Frey, Mohamad E Allaf, Yong Du, Mehrbod S Javadi
OBJECTIVE: Technetium-99m (99mTc)-sestamibi single-photon emission computed tomography/computed tomography (SPECT/CT) has previously been shown to allow for the accurate differentiation of benign renal oncocytomas and hybrid oncocytic/chromophobe tumors (HOCTs) apart from other malignant renal tumor histologies, with oncocytomas/HOCTs showing high uptake and renal cell carcinoma (RCC) showing low uptake based on uptake ratios from non-quantitative single-photon emission computed tomography (SPECT) reconstructions...
December 6, 2017: Annals of Nuclear Medicine
https://www.readbyqxmd.com/read/29208006/identification-and-validation-of-a-44-gene-expression-signature-for-the-classification-of-renal-cell-carcinomas
#16
Qifeng Wang, Hualei Gan, Chengshu Chen, Yifeng Sun, Jinying Chen, Midie Xu, Weiwei Weng, Liyu Cao, Qinghua Xu, Jian Wang
BACKGROUND: Renal cancers account for more than 3% of all adult malignancies and cause more than 23,400 deaths per year in China alone. The four most common types of kidney tumours include clear cell, papillary, chromophobe and benign oncocytoma. These histological subtypes vary in their clinical course and prognosis, and different clinical strategies have been developed for their management. Some kidney tumours can be very difficult to distinguish based on the pathological assessment of morphology and immunohistochemistry...
December 6, 2017: Journal of Experimental & Clinical Cancer Research: CR
https://www.readbyqxmd.com/read/29200669/adrenal-mass-unusual-presentation-and-outcome
#17
Raghu Sampally Ramareddy, Anand Alladi
Aim: Adrenal mass may be functioning or nonfunctioning with varied clinical presentations. This study aimed to report the nature and management of uncommon adrenal mass and to review literature. Materials and Methods: This was an retrospective observational analysis of children with uncommon adrenal mass admitted during 2009-2015. Clinical features, investigations, and management of patients were analyzed. Results: Among six, two each were adolescent and neonate, and one each was young infant and prenatal...
July 2017: Indian Journal of Medical and Paediatric Oncology
https://www.readbyqxmd.com/read/29174943/use-of-99mtc-sestamibi-single-photon-emission-computed-tomography-x-ray-computed-tomography-in-the-diagnosis-of-hybrid-oncocytic-chromophobe-tumor-in-a-pediatric-patient
#18
Nima Almassi, Michael A Gorin, Andrei S Purysko, Steven P Rowe, Jihad Kaouk, Mohamad E Allaf, Steven C Campbell, Audrey Rhee
The differential diagnosis of solid renal neoplasms in adolescence includes aggressive malignancy and indolent oncocytic tumors, which are typically indistinguishable using conventional imaging. We report the use of 99mTc-sestamibi single-photon emission computed tomography / x-ray computed tomography (SPECT/CT) in characterizing enhancing renal neoplasms in a pediatric patient. Genetic testing suggested a hereditary syndrome associated with aggressive malignancy, whereas renal mass biopsy suggested an oncocytic tumor...
November 23, 2017: Urology
https://www.readbyqxmd.com/read/29146062/three-cases-of-adrenocortical-tumors-mistaken-for-hepatocellular-carcinomas-diagnostic-pitfalls-and-differential-diagnosis
#19
Won Young Park, Hyung Il Seo, Kyung Un Choi, Ahrong Kim, Young Keum Kim, So Jeong Lee, Chang Hun Lee, Gi Yeong Huh, Do Youn Park
Adrenocortical adenomas and carcinomas in other parenchyma are extremely rare, with few cases reported and because of the rarity of these tumors, they occasionally cause problems during diagnosis. Adrenal cortical neoplasms in liver parenchyma can be present in 3 forms, including direct invasion or adhesion to liver parenchyma, tumors arising in adrenohepatic fusion tissue or in ectopic adrenal gland tissue. We report 3 cases of adrenal cortical tumors that were misdiagnosed as hepatocellular carcinoma in the preoperative state...
December 2017: Annals of Diagnostic Pathology
https://www.readbyqxmd.com/read/29132724/emerging-entities-in-renal-cell-neoplasia-thyroid-like-follicular-renal-cell-carcinoma-and-multifocal-oncocytoma-like-tumours-associated-with-oncocytosis
#20
REVIEW
John N Eble, Brett Delahunt
The list of accepted entities of renal cell neoplasia has burgeoned since the turn of the century through recognition of rare tumour types and the discovery of genetic mutations driving renal neoplasia syndromes. This growth has not finished and in this report we present examples of each of these types which were not included in the 2016 World Health Organization classification of renal neoplasia, but are candidates for inclusion in the next edition of the classification. Thyroid-like follicular renal cell carcinoma is a rare tumour type with a distinctive microscopic appearance resembling follicles of the thyroid gland...
November 10, 2017: Pathology
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