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https://www.readbyqxmd.com/read/28923625/genitourinary-malignancies-in-transplant-or-dialysis-patients-the-frequency-of-two-newly-described-2016-world-health-organization-histopathologic-types
#1
A Billis, L L L Freitas, L B E Costa, I S Barreto, M A Asato, K S Araujo, D M Losada, A P Herculiani, G V B S Tabosa, B C Zaidan, G L P Oliveira, L Q A Bastos, R M Rocha
BACKGROUND: The aim of this study was to revise the histopathologic types of neoplasias in the genitourinary tract and determine the frequency of 2 new entities included in the 2016 book of World Health Organization classification of renal tumors. It is not established so far whether these 2 recently described tumors are the most frequent in association with end-stage kidney disease. METHODS: In a retrospective analysis, we revised the histopathologic type of 37 genitourinary tumors from 21 patients in dialysis and/or submitted to renal transplantation from 2003 to 2016 aiming to find the frequency of acquired cystic disease-associated renal cell carcinoma and clear cell papillary (tubulopapillary) renal cell carcinoma...
October 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28918618/concurrent-oncocytoma-and-two-angiomyolipomas-in-a-diabetic-kidney-a-very-rare-condition
#2
Fariba Abbasi, Ata Abbasi, Mansour Alizadeh, Parisa Modarresi
Angiomyolipoma (AML) and oncocytoma are uncommon benign neoplasms of the kidney which their simultaneous occurrence in the same kidney is extremely rare. This study reports a 60-year-old diabetic woman with the rare simultaneous occurrence of three renal masses. Histologic evaluation revealed two angiomyolipomas and one oncocytoma within the same kidney, in a background of histologic features of diabetic nephropathy. Renal angiomyolipoma and oncocytoma are uncommon neoplasms, and their simultaneous occurrence in the same kidney is extremely rare...
July 2017: Acta Medica Iranica
https://www.readbyqxmd.com/read/28900880/characterizing-indeterminate-renal-masses-with-molecular-imaging-the-role-of-99m-tc-mibi-spect-ct
#3
REVIEW
Andrew M Reynolds, Kristin Kelly Porter
PURPOSE OF REVIEW: The majority of enhancing renal masses cannot be characterized through imaging as malignant or benign; however, such characterization could save patients from unnecessary surgery and/or biopsy and associated morbidity. Herein, we review the recent literature on the emerging use of (99m)Tc-MIBI SPECT/CT in preoperative differentiation of enhancing renal masses. RECENT FINDINGS: Recent reports have shown that (99m)Tc-MIBI SPECT/CT imaging can differentiate mitochondrial-rich, benign, or indolent renal masses from renal cell carcinoma...
September 12, 2017: Current Urology Reports
https://www.readbyqxmd.com/read/28898443/re-evaluation-of-33-unclassified-eosinophilic-renal-cell-carcinomas-in-young-patients
#4
Yunjie Li, Victor E Reuter, Andres Matoso, George J Netto, Jonathan I Epstein, Pedram Argani
AIMS: We sought to determine if some unclassified renal cell carcinomas (RCCs) in children and young adults that are characterized by predominantly eosinophilic cytoplasm are related to the recently described succinate dehydrogenase (SDH)-deficient RCC, fumarate hydratase (FH)-deficient RCC, or eosinophilic solid and cystic (ESC) RCC. METHODS AND RESULTS: We reviewed 33 unclassified RCCs with predominantly eosinophilic cytoplasm in patients age 35 years or younger...
September 12, 2017: Histopathology
https://www.readbyqxmd.com/read/28862728/value-of-triphasic-mdct-in-the-differentiation-of-small-renal-cell-carcinoma-and-oncocytoma
#5
Michele Scialpi, Eugenio Martorana, Valeria Rondoni, Ahmed Eissa, Ahmed El Sherbiny, Luigi Bevilacqua, Luis H Ros, Irene Escartín Martínez, Michele Milizia, Lucia Manganaro, Maria Antonietta Mazzei, Alfredo D'Andrea, Giampaolo Bianchi
INTRODUCTION: Although differentiation between benign and malignant small renal tumors (≤4 cm) is still difficult, it is a demand for decision making and determining the treatment strategy. Our aim is to evaluate the role of multidetector row computed tomography (MDCT) in the differentiation of small renal clear cell carcinoma (RCC) and renal oncocytoma (RO). METHODS: We reviewed triphasic computed tomographic (CT) scans performed in 43 patients diagnosed with RCC (n = 23) and RO (n = 21)...
August 11, 2017: Urologia
https://www.readbyqxmd.com/read/28856401/applications-of-contrast-enhanced-ultrasound-in-the-kidney
#6
REVIEW
Brittany Kazmierski, Corinne Deurdulian, Hisham Tchelepi, Edward G Grant
Incidental discovery of renal lesions on cross-sectional imaging studies performed for other indications is not uncommon. With the increased reliance on medical imaging, the number of incidentally detected renal lesions has also grown over time. While simple cysts account for the majority of these lesions, the presence of complex features within a cystic lesion, such as septations and solid components, can present a confusing picture. Solid lesions, too, can be indeterminate, and distinguishing between benign solid masses (like lipid-poor angiomyolipomas and oncocytomas) and renal cell carcinoma affects patient management and can prevent unnecessary interventions...
August 30, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28843710/renal-collision-tumor-composed-of-oncocytoma-and-mucinous-tubular-and-spindle-cell-carcinoma-case-report-of-an-unprecedented-entity
#7
Komal Arora, Ross Miller, Seema Mullick, Steven Shen, Alberto G Ayala, Jae Y Ro
Primary renal collision tumors composed of two histologically distinct components are rare with only isolated case reports in the medical literature. Oncocytoma is a benign renal neoplasm, which is thought to originate from distal tubular epithelial cells. Mucinous tubular and spindle cell carcinoma (MTSCC) of kidney is a rare, relatively recently described renal neoplasm that was first included in the 2004 World Health Organization RCC classification as a distinct entity. Current studies suggest the tumor originates from the proximal nephron, although it is still controversial...
August 23, 2017: Human Pathology
https://www.readbyqxmd.com/read/28834450/frequency-of-angiomyolipomas-among-echogenic-nonshadowing-renal-masses-4-mm-found-at-ultrasound-and-the-utility-of-mri-for-diagnosis
#8
Suresh de Silva, Ross Copping, David Malouf, Anthony Hutton, Fiona Maclean, Peter Aslan
OBJECTIVE: The purpose of this study is to evaluate what percentage of echogenic nonshadowing renal lesions larger than 4 mm found at ultrasound are angiomyolipomas (AMLs) and to review how to diagnose AMLs, with particular emphasis on the increasing role played by MRI. MATERIALS AND METHODS: The study data were obtained at a single institution over a period of 45 months. Although some patients were being reviewed for specific symptoms, such as hematuria, pain, or recurrent urinary tract infections, most of the findings were incidental...
August 23, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28833389/morphologic-spectrum-of-renal-cell-carcinoma-unclassified-an-analysis-of-136-cases
#9
Carmen M Perrino, David J Grignon, Sean R Williamson, Muhammad T Idrees, John N Eble, Liang Cheng
AIMS: Renal cell carcinoma, unclassified (RCCU) is a category that includes a morphologically and biologically heterogeneous group of tumors that are unable to be diagnosed as other well-defined entities. We aim to describe the morphologic findings of tumors within this category and to determine the most frequent morphologic features leading to classification difficulty. METHODS AND RESULTS: One hundred and thirty-six cases of RCCU were examined. Patients ranged in age from 23 to 87 years...
August 18, 2017: Histopathology
https://www.readbyqxmd.com/read/28821944/the-2017-world-health-organization-classification-of-tumors-of-the-pituitary-gland-a-summary
#10
REVIEW
M Beatriz S Lopes
The 4th edition of the World Health Organization (WHO) classification of endocrine tumors has been recently released. In this new edition, major changes are recommended in several areas of the classification of tumors of the anterior pituitary gland (adenophypophysis). The scope of the present manuscript is to summarize these recommended changes, emphasizing a few significant topics. These changes include the following: (1) a novel approach for classifying pituitary neuroendocrine tumors according to pituitary adenohypophyseal cell lineages; (2) changes to the histological grading of pituitary neuroendocrine tumors with the elimination of the term "atypical adenoma;" and (3) introduction of new entities like the pituitary blastoma and re-definition of old entities like the null-cell adenoma...
August 18, 2017: Acta Neuropathologica
https://www.readbyqxmd.com/read/28814709/spindle-cell-oncocytoma-of-the-anterior-pituitary-presenting-with-an-acute-clinical-course-due-to-intraventricular-hemorrhage-a-case-report-and-review-of-literature
#11
Mostafa Osman, Andrew Wild
BACKGROUND Spindle cell oncocytoma (SCO) is a rare nonfunctioning neoplasm of the adenohypophysis, and was first described in 2002. SCO has been categorized as a separate entity by the 2007 World Health Organization (WHO) and is classified as a Grade 1 tumor of the central nervous system (CNS). Review of the literature has shown that 33 cases of SCO have been reported to date, and most of them presented with a mass effect or with panhypopituitarism. However, all reported cases have described the tendency of SCO to be hypervascular on imaging and histology...
August 17, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28807344/pituicytoma-review-of-commonalities-and-distinguishing-features-among-ttf-1-positive-tumors-of-the-central-nervous-system
#12
REVIEW
Siba El Hussein, Cristina Vincentelli
Pituicytoma is a rare low-grade glial neoplasm that originates in the distribution of the neurohypophysis, including the posterior pituitary lobe and infundibular stalk. The tumor cells resemble pituicytes, which are specialized glial cells of the neurohypophysis. Pituicytoma can be misdiagnosed pre-operatively as a pituitary adenoma due to overlapping clinical and neuroimaging features between these two entities. Pituicytoma can also mimic other neoplasms of the sellar and parasellar regions microscopically - meningioma, schwannoma and pilocytic astrocytoma - and shares immunohistochemical expression of TTF-1 with spindle cell oncocytoma and granular cell tumor of the sellar region, suggesting a common histogenesis...
August 2017: Annals of Diagnostic Pathology
https://www.readbyqxmd.com/read/28807339/primary-collision-tumors-of-the-kidney-composed-of-oncocytoma-and-papillary-renal-cell-carcinoma-a-review
#13
REVIEW
Zulfia McCroskey, Sue J Sim, Andrew A Selzman, Alberto G Ayala, Jae Y Ro
BACKGROUND: There are well known cases of hybrid tumors of chromophobe renal cell carcinoma (RCC) and oncocytoma in kidney, where both tumors have the same cell of origin - intercalated cell of the collecting duct. However, collision tumors composed of neoplasms originating from different cell lineages such as oncocytoma and papillary RCC are extremely rare. Herein, we made a collective literature review of reported cases of collision tumors composed of oncocytoma and papillary RCC, adding a case that we recently experienced...
August 2017: Annals of Diagnostic Pathology
https://www.readbyqxmd.com/read/28766057/overview-of-the-2017-who-classification-of-pituitary-tumors
#14
REVIEW
Ozgur Mete, M Beatriz Lopes
This review focuses on discussing the main changes on the upcoming fourth edition of the WHO Classification of Tumors of the Pituitary Gland emphasizing histopathological and molecular genetics aspects of pituitary neuroendocrine (i.e., pituitary adenomas) and some of the non-neuroendocrine tumors involving the pituitary gland. Instead of a formal review, we introduced the highlights of the new WHO classification by answering select questions relevant to practising pathologists. The revised classification of pituitary adenomas, in addition to hormone immunohistochemistry, recognizes the role of other immunohistochemical markers including but not limited to pituitary transcription factors...
August 1, 2017: Endocrine Pathology
https://www.readbyqxmd.com/read/28763900/-application-of-mini-flank-open-nephron-sparing-surgery-via-retroperitoneal-route-for-centrally-located-renal-tumor-treatment-a-single-center-experience
#15
Y N Lu, F Zhang, X Y Hu, N Q Yang, J M Guo, H Wang
Objective: To investigate the safety and feasibility of mini-flank open nephron sparing surgery (MI-OPN) via retroperitoneal route for the treatment of centrally located renal tumor. Methods: From May 2013 to April 2015, twenty-four cases of centrally located renal tumor were treated with MI-OPN via retroperitoneal route in Zhongshan Hospital. All cases were included in this study with whose clinical data and long term follow-up information retrospectively analyzed. Results: With the assistance of intraoperative ultrasonography to confirm tumor location and boundary, MI-OPN was successfully performed in all cases...
July 25, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28755508/solid-renal-tumors-isoenhancing-to-kidneys-on-contrast-enhanced-sonography-differentiation-from-pseudomasses
#16
Michele Bertolotto, Calogero Cicero, Orlando Catalano, Francesca Currò, Lorenzo Egildo Derchi
OBJECTIVES: To estimate the prevalence of solid renal tumors isoenhancing to kidneys in all vascular phases on contrast-enhanced sonography and to investigate whether they can be differentiated from pseudomasses. METHODS: A computer search of the databases of 3 institutions identified 31 patients with pseudomasses and 380 patients with solid tumors investigated with contrast-enhanced sonography. Nineteen of 380 (5%) patients had tumors isoenhancing in all phases...
July 29, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28737368/spindle-cell-oncocytoma-of-the-pituitary-gland
#17
Mansour Mathkour, Juanita Garces, Tyler Scullen, Edison Valle-Giler, Shams Halat, Teresa Arrington, Marcus Ware
No abstract text is available yet for this article.
October 2017: Journal of Neurosurgical Sciences
https://www.readbyqxmd.com/read/28687249/etiopathogenesis-of-oncocytomas
#18
REVIEW
Marcelo Correia, Pedro Pinheiro, Rui Batista, Paula Soares, Manuel Sobrinho-Simões, Valdemar Máximo
Oncocytomas are distinct tumors characterized by an abnormal accumulation of defective and (most probably) dysfunctional mitochondria in cell cytoplasm of such tumors. This particular phenotype has been studied for the last decades and the clarification of the etiopathogenic causes are still needed. Several mechanisms involved in the formation and maintenance of oncocytomas are accepted as reasonable causes, but the relevance and contribution of each one for oncocytic transformation may depend on different cancer etiopathogenic contexts...
July 4, 2017: Seminars in Cancer Biology
https://www.readbyqxmd.com/read/28682831/liver-metastases-from-renal-oncocytoma-with-vascular-extension
#19
Giovanni Cacciamani, Luca Cima, Miriam Ficial, Giovanni Novella, Salvatore Siracusano, Umberto Tedeschi, Matteo Balzarro, Umberto Montin, Maria A Cerruto, Vincenzo De Marco, Antonio B Porcaro, Ondrej Hes, Antonia DʼErrico, Guido Martignoni, Claudio Ghimenton, Gianluigi Zaza, Walter Artibani, Matteo Brunelli, Albino Eccher
The 2016 World Health Organization Renal Tumor Classification defines renal oncocytoma (RO) as a benign epithelial tumor; however, malignant histopathologic features have been documented. Rare cases with metastases have been reported. We describe the case of a 62-year-old woman who was referred to the Urology Clinic for a routine work-up. Magnetic resonance imaging and computerized tomography showed a 7-cm mass in the middle and lower portions of the left kidney and 2 suspected liver metastases. The patient underwent surgery...
July 4, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28668830/increased-nicotinamide-phosphoribosyltransferase-and-cystathionine-%C3%AE-synthase-in-renal-oncocytomas-renal-urothelial-carcinoma-and-renal-clear-cell-carcinoma
#20
Rodney E Shackelford, Jehan Abdulsattar, Eric X Wei, James Cotelingam, Domenico Coppola, Guillermo A Herrera
BACKGROUND: Renal oncocytomas (ROs), and clear cell (RCC) and urothelial carcinomas (UC), are common renal neoplasms. Nicotinamide phosphoribosyltransferase (Nampt) catalyzes the rate-limiting step of NAD(+) synthesis and its expression is increased in several tumors. Nampt concomitantly regulates hydrogen sulfide (H2S)-synthesizing enzyme levels, including cystathionine-β-synthase (CBS). MATERIALS AND METHODS: We used tissue microarrays to examine Nampt and the H2S-synthesizing enzyme CBS protein levels in benign kidney, RCC, UC and ROs...
July 2017: Anticancer Research
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