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https://www.readbyqxmd.com/read/28325361/warthin-like-papillary-renal-cell-carcinoma-clinicopathologic-morphologic-immunohistochemical-and-molecular-genetic-analysis-of-11-cases
#1
Faruk Skenderi, Monika Ulamec, Tomas Vanecek, Petr Martinek, Reza Alaghehbandan, Maria Pane Foix, Iva Babankova, Delia Perez Montiel, Isabel Alvarado-Cabrero, Marian Svajdler, Pavol Dubinský, Dana Cempirkova, Michal Pavlovsky, Semir Vranic, Ondrej Daum, Ondrej Ondic, Kristyna Pivovarcikova, Kvetoslava Michalova, Milan Hora, Pavla Rotterova, Adela Stehlikova, Martin Dusek, Michal Michal, Ondrej Hes
Oncocytic papillary renal cell carcinoma (PRCC) is a distinct subtype of PRCC, listed as a possible new variant of PRCC in the 2016 WHO classification. It is composed of papillae aligned by large single-layered eosinophilic cells showing linearly arranged oncocytoma-like nuclei. We analyzed clinicopathologic, morphologic, immunohistochemical and molecular-genetic characteristics of 11 oncocytic PRCCs with prominent tumor lymphocytic infiltrate, morphologically resembling Warthin's tumor. The patients were predominantly males (8/11, 73%), with an average age of 59years (range 14-76), and a mean tumor size of 7cm (range 1-22cm)...
April 2017: Annals of Diagnostic Pathology
https://www.readbyqxmd.com/read/28315424/diagnostic-criteria-for-oncocytic-renal-neoplasms-a-survey-of-urologic-pathologists
#2
Sean R Williamson, Ramya Gadde, Kiril Trpkov, Michelle S Hirsch, John R Srigley, Victor E Reuter, Liang Cheng, L Priya Kunju, Ravi Barod, Craig G Rogers, Brett Delahunt, Ondrej Hes, John N Eble, Ming Zhou, Jesse K McKenney, Guido Martignoni, Stewart Fleming, David J Grignon, Holger Moch, Nilesh S Gupta
Renal oncocytoma and chromophobe renal cell carcinoma (RCC) have been long recognized as distinct tumors; however, it remains unknown if uniform diagnostic criteria are used to distinguish these tumor types in practice. A survey was distributed to urologic pathologists regarding oncocytic tumors. Responses were received from 17/26 invitees. Histologically, >1 mitotic figure was regarded as most worrisome (n=10) or incompatible (n=6) with oncocytoma diagnosis. Interpretation of focal nuclear wrinkling, focal perinuclear clearing, and multinucleation depended on extent and did not necessarily exclude oncocytoma if minor...
March 14, 2017: Human Pathology
https://www.readbyqxmd.com/read/28295484/who-2016-classification-changes-and-advancements-in-the-diagnosis-of-miscellaneous-primary-cns-tumours
#3
Felix Sahm, David E Reuss, Caterina Giannini
This short review highlights significant changes and recent findings incorporated to varying extent in the WHO 2016 definition of a variety of tumours, including peripheral nerve sheath tumours, meningiomas, mesenchymal non-meningothelial tumours, melanocytic tumours, lymphomas and histiocytic tumours, germ cell tumours and non-neuroendocrine pituitary tumours. Most notable classification changes include: adding "hybrid nerve sheath tumours" to the spectrum of benign nerve sheath tumours; an updated definition of atypical meningioma (WHO grade II), including cases with brain invasion; recognizing dural solitary fibrous tumour (SFT) and haemangiopericytoma (HPC) as a single tumour entity characterized by NAB2 and STAT6 gene fusions for which the term solitary SFT/HPC was chosen; recognizing that pituitary granular cell tumour, spindle cell oncocytoma, and pituicytoma all share nuclear expression of TTF-1, possibly representing a spectrum of a single nosological entity derived from posterior pituitary glial cells...
March 12, 2017: Neuropathology and Applied Neurobiology
https://www.readbyqxmd.com/read/28286028/spindle-cell-oncocytoma-report-of-two-cases-with-massive-bleeding-and-review-of-the-literature
#4
REVIEW
Domenico Billeci, Elisabetta Marton, Enrico Giordan, Valentina Carraro, Monica Ronzon, Sabrina Rossi
Spindle cell oncocytoma (SCO) is a rare pituitary tumor, classified as a WHO grade I neoplasm. Due to its rarity, SCO is often preoperatively misdiagnosed as a pituitary macroadenoma. In the present study we report two recent cases of SCO, a 61-year-old male and a 65-year-old female presenting at Treviso General Hospital between March 2014 and April 2015. Tumor resection was achieved by endoscopic transsphenoidal approach but massive hemorrhagic events hampered surgery, endangering the patient's life in both cases...
March 9, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28280876/quantitative-computer-aided-diagnostic-algorithm-for-automated-detection-of-peak-lesion-attenuation-in-differentiating-clear-cell-from-papillary-and-chromophobe-renal-cell-carcinoma-oncocytoma-and-fat-poor-angiomyolipoma-on-multiphasic-multidetector-computed
#5
Heidi Coy, Jonathan R Young, Michael L Douek, Matthew S Brown, James Sayre, Steven S Raman
OBJECTIVE: To evaluate the performance of a novel, quantitative computer-aided diagnostic (CAD) algorithm on four-phase multidetector computed tomography (MDCT) to detect peak lesion attenuation to enable differentiation of clear cell renal cell carcinoma (ccRCC) from chromophobe RCC (chRCC), papillary RCC (pRCC), oncocytoma, and fat-poor angiomyolipoma (fp-AML). MATERIALS AND METHODS: We queried our clinical databases to obtain a cohort of histologically proven renal masses with preoperative MDCT with four phases [unenhanced (U), corticomedullary (CM), nephrographic (NP), and excretory (E)]...
March 9, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28271050/incidental-finding-of-adrenal-oncocytoma-after-right-robotic-adrenalectomy-case-report-and-literature-review
#6
Othman Alamoudi, Wael Alsulaiman, Naif Aldhaam, Maher Moazin
Oncocytic neoplasms occur in several organs and are most commonly found in the thyroid, kidneys and salivary glands. Oncocytic neoplasms of the adrenal cortex are extremely rare and are usually non-functioning, benign and incidentally detected. However, histologically, they are characterized by cells with eosinophilic granular cytoplasm and numerous packed mitochondria. We report a case of 33 year old lady medically free complain of right flank pain radiated to the lower abdomen, not associated with any aggravating or relieving factor or any other symptom there was no evidence of hypertension symptom, by the Magnetic resonance imaging (MRI) showed that she has large heterogeneous mass seen at the right adrenal gland, and it was managed successfully by Robot-Assisted Right Adrenalectomy...
May 2017: Urology Case Reports
https://www.readbyqxmd.com/read/28268233/does-computed-tomography-still-have-limitations-to-distinguish-benign-from-malignant-renal-tumors-for-radiologists
#7
Toshitaka Shin, Vinay A Duddalwar, Osamu Ukimura, Toru Matsugasumi, Frank Chen, Nariman Ahmadi, Andre Luis de Castro Abreu, Hiromitsu Mimata, Inderbir S Gill
OBJECTIVES: To evaluate the current accuracy of CT for diagnosing benign renal tumors. MATERIALS AND METHODS: We retrospectively reviewed 905 patients who underwent preoperative CT followed by surgical resection. The final pathology was benign in 156 patients (17%). After exclusions, 140 patients with 163 benign tumors were included and 3 sets of the CT interpretations by radiologists with varying levels of experience were analyzed. RESULTS: The histological breakdown was as follows: oncocytomas (54...
March 8, 2017: Urologia Internationalis
https://www.readbyqxmd.com/read/28260171/renal-tumors-with-low-signal-intensities-on-t2-weighted-mr-image-radiologic-pathologic-correlation
#8
REVIEW
Youyeon Kim, Deuk Jae Sung, Ki Choon Sim, Na Yeon Han, Beom Jin Park, Min Ju Kim, Sung Bum Cho
Accurate characterization of renal masses is essential for ensuring appropriate management. Low T2 signal intensity is a common feature of papillary renal cell carcinoma and fat-poor angiomyolipoma. Nonetheless, other types of renal cell carcinoma, oncocytoma, hemangioma, lymphoma, leiomyoma, and urothelial cell carcinoma also can show low signal intensities on T2-weighted imaging (T2WI). Histopathologic features that can lead to low T2 signal intensities in renal tumors include smooth muscle component, papillary architecture, a high nucleus-to-cytoplasm ratio, and hemorrhage...
March 4, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28237146/is-routine-histopathological-examination-of-dacryocystorhinostomy-dacryocystectomy-specimens-necessary-a-tertiary-eye-hospital-experience
#9
Hind Alkatan, Majed Al-Qurashi
PURPOSE: Limited literature documenting the incidence of unsuspected malignant neoplasm among dacryocystorhinostomy/Dacryocystectomy (DCR/DCT) specimens is reviewed to determine if routine biopsy of all the patients undergoing such procedures is required. We are evaluating if sending lacrimal sac specimens for histopathological examination is necessary as a routine patient's care standard. STUDY DESIGN: This is a retrospective study of all lacrimal sac specimens received for histopathological examination in a tertiary eye hospital over a period of 12 years...
February 2017: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
https://www.readbyqxmd.com/read/28197683/aorta-lesion-attenuation-difference-alad-on-contrast-enhanced-ct-a-potential-imaging-biomarker-for-differentiating-malignant-from-benign-oncocytic-neoplasms
#10
Manish Dhyani, Joseph R Grajo, Dayron Rodriguez, Zhikui Chen, Adam Feldman, Rosemary Tambouret, Debra A Gervais, Ronald S Arellano, Peter F Hahn, Anthony E Samir
OBJECTIVE: To evaluate whether the Aorta-Lesion-Attenuation-Difference on contrast-enhanced CT can aid in the differentiation of malignant and benign oncocytic renal neoplasms. MATERIALS AND METHODS: Two independent cohorts-an initial (biopsy) dataset and a validation (surgical) dataset-with oncocytomas and chromophobe renal cell carcinomas (chRCC) were included in this IRB-approved retrospective study. A region of interest was placed on the renal mass and abdominal aorta on the same CT image slice to calculate an Aorta-Lesion-Attenuation-Difference (ALAD)...
February 14, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28130580/-what-can-should-be-treated-in-kidney-tumors-and-when
#11
C M Sommer, D F Vollherbst, G M Richter, H U Kauczor, P L Pereira
CLINICAL/METHODICAL ISSUE: In the treatment of localized renal cell carcinoma, the lack of randomization in controlled trials on thermal ablation is a major limitation. The latter leads to significant study bias and it ultimately remains unclear whether the improved overall survival in favor of partial nephrectomy can actually be attributed to the treatment method. STANDARD RADIOLOGICAL METHODS: For T1a (≤4 cm) renal cell carcinoma without lymph node and distant metastases, excellent technical and clinical results have been described after imaging-guided radiofrequency ablation and cryoablation...
February 2017: Der Radiologe
https://www.readbyqxmd.com/read/28130290/giant-renal-oncocytoma-with-classic-stellate-scar
#12
Rachael D Sussman, Keith J Kowalczyk
No abstract text is available yet for this article.
January 27, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28125273/performance-of-relative-enhancement-on-multiphasic-mri-for-the-differentiation-of-clear-cell-renal-cell-carcinoma-rcc-from-papillary-and-chromophobe-rcc-subtypes-and-oncocytoma
#13
Jonathan R Young, Heidi Coy, Hyun J Kim, Michael Douek, Pechin Lo, Allan J Pantuck, Steven S Raman
OBJECTIVE: The objective of our study was to investigate the performance of relative enhancement on multiphasic MRI to differentiate clear cell renal cell carcinoma (RCC) from other RCC subtypes (papillary and chromophobe) and oncocytoma. MATERIALS AND METHODS: For this study, we derived a cohort of 34 clear cell RCCs, nine oncocytomas, 12 papillary RCCs, and 10 chromophobe RCCs with a preoperative multiphasic dynamic contrast-enhanced MRI study with up to four phases (i...
April 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28121922/malignant-adenohypophysis-spindle-cell-oncocytoma-with-repeating-recurrences-and-a-high-ki-67-index
#14
Xiangyi Kong, Dongmei Li, Yanguo Kong, Dingrong Zhong
Adenohypophysis spindle cell oncocytoma (ASCO) is a rare tumor recently reported by Roncaroli et al in 2002. This tumor is considered a grade I tumor by the World Health Organization.We report a rare case of malignant ASCO with repeating recurrences and a high Ki-67 index-a challenging diagnosis guided by clinical presentations, radiological signs, and postoperative pathological tests.We represent a 30-year-old man who had suffered from headaches, diplopia, and impaired visual field and acuity. His magnetic resonance imaging revealed an abnormal sellar mass and was originally misdiagnosed as a pituitary macroadenoma...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28115060/molecular-and-metabolic-features-of-oncocytomas-seeking-the-blueprints-of-indolent-cancers
#15
REVIEW
Monica De Luise, Giulia Girolimetti, Bernard Okere, Anna Maria Porcelli, Ivana Kurelac, Giuseppe Gasparre
Oncocytic tumors are a peculiar subset of human neoplasms in which mitochondria have been proven to have a prominent role. A number of paradoxes render these clinical entities interesting from the translational research point of view. Most oncocytic tumors are generally metabolically constrained due to the impaired respiratory capacity and lack of the ability to respond to hypoxia, yet they maintain features that allow them to strive and persist in an indolent form. Their unique molecular and metabolic characteristics are an object of investigation that may reveal novel ways for therapeutic strategies based on metabolic targeting...
January 20, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28114223/defining-the-added-value-of-99mtc-mibi-spect-ct-to-conventional-cross-sectional-imaging-in-the-characterization-of-enhancing-solid-renal-masses
#16
Sara Sheikhbahaei, Christopher S Jones, Kristin K Porter, Steven P Rowe, Michael A Gorin, Alex S Baras, Phillip M Pierorazio, Mark W Ball, Takahiro Higuchi, Pamela T Johnson, Lilja B Solnes, Jonathan I Epstein, Mohamad E Allaf, Mehrbod S Javadi
PURPOSE: This study investigates whether the addition of preoperative Tc-MIBI SPECT/CT can increase the degree of diagnostic confidence in the differentiation of benign from malignant enhancing renal masses. PATIENTS AND METHODS: Patients were recruited as part of an institutional review board-approved prospective clinical trial. Forty-eight patients with clinical stage T1 solid renal masses who underwent a Tc-MIBI SPECT/CT before partial or radical nephrectomy were evaluated...
January 20, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28102527/teratoma-of-the-sellar-region-a-case-report
#17
Wolfgang Saeger, Azadeh Ebrahimi, Rudi Beschorner, Hildegard Spital, Jürgen Honegger, Waldemar Wilczak
The case report describes a teratoma of the sellar region with a gland forming and an immature, relatively clear undifferentiated component without signs of anaplasia. Both components express TTF-1 indicating their presumable origin in the neurohypophysis as part of the circumventricular organs. The differential diagnosis includes pituitary adenoma and spindle cell oncocytoma with inclusion of Rathke's cleft cyst, pituitary blastoma, yolk sac tumor, and other germ cell tumors. The prognosis is the same as in the immature teratomas in the gonads, specifically unclear...
January 19, 2017: Endocrine Pathology
https://www.readbyqxmd.com/read/28095383/evaluation-of-plasmatic-kisspetin-10-as-a-biomarker-for-malignancy-and-subtype-differentiation-in-small-renal-tumours
#18
Marcus Horstmann, Felix Krause, Daniel Steinbach, Lars Twelker, Marc-Oliver Grimm
OBJECTIVE: To evaluate Kisspeptin-10 (Kiss-10) in patients with small renal tumours (SRTs) and controls. MATERIAL AND METHODS: Kiss-10 was measured in preoperative plasma samples in a cohort of 143 patients with unilateral renal tumours smaller than or equal to 4 cm and 40 age-matched controls by a competitive ELISA test kit. The cohort of patients included 56 patients with clear cell renal cell carcinoma (ccRCC), 43 with papillary RCC (pRCC), 12 with chromophobe RCC (chRCC) and 32 with oncocytomas...
2017: Urologia Internationalis
https://www.readbyqxmd.com/read/28093347/a-novel-invasive-related-biomarker-in-three-subtypes-of-non-functioning-pituitary-adenomas
#19
Yong Chen, Hong-Li Chuan, Sheng-Yuan Yu, Chu-Zhong Li, Zhe-Bao Wu, Gui-Lin Li, Ya-Zhuo Zhang
OBJECTIVES: To identify biomarkers key to invasiveness of the three subtypes of non-functioning pituitary adenomas (NFPAs) and provide a guidance for therapeutic decision-making and identification of potential adjuvant drugs. METHODS: Fifty NFPAs tumor tissues obtained from transsphenoidal surgery were used in the study. Three invasive NFPAs and four non-invasive NFPAs were used for gene expression microarray analyses; Additionally, there are five invasive NFPAs and four non-invasive NFPAs used for proteomic analyses...
January 13, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28092140/a-systematic-review-of-sinonasal-oncocytomas-and-oncocytic-carcinomas-diagnosis-management-and-technical-considerations
#20
REVIEW
Zerina Hodzic, Nicholas R Rowan, Ryota Kashiwazaki, Thomas J Willson, Eric W Wang, Stella E Lee
BACKGROUND: Oncocytomas and oncocytic carcinomas are rare tumors of the sinonasal cavity with the propensity for local invasion. This report and systematic review details a case of a nasal oncocytoma involving the lacrimal sac and provides an update of the current literature. METHODS: A systematic literature review was performed using PubMed and Ovid databases. The data obtained from published articles with sinonasal oncocytoma/oncocytic carcinoma as the primary diagnosis included patient demographics, presentation, radiographic and histologic findings, management, and recurrence rates...
January 16, 2017: International Forum of Allergy & Rhinology
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