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Angiomyolipoma

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https://www.readbyqxmd.com/read/28320064/hepatobiliary-and-pancreatic-hepatocellular-carcinoma-developed-with-angiomyolipoma
#1
T Miyata, Y Yamashita, T Yamao, N Umezaki, M Tsukamoto, Y Kitano, K Yamamura, K Arima, T Kaida, S Nakagawa, K Imai, D Hashimoto, A Chikamoto, T Ishiko, T Asato, Y Mikami, S Aishima, H Baba
No abstract text is available yet for this article.
March 2017: Journal of Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28318774/-epithelioid-angiomyolipoma-of-the-kidney-about-one-case-and-malignant-features-evaluation
#2
Pierre-Marie Lavrut, Philippe Paparel, Myriam Decaussin-Petrucci
Renal epithelioid angiomyolipoma (E-AML) is a rare mesenchymal tumor of the kidney included in the family of tumor with perivascular epithelioid cell differentiation (PEComas) and is frequently associated with tuberous sclerosis complex. Since its clinical and radiological features are not specific, the diagnosis remained mostly pathological. Microscopically, E-AML demonstrate proliferation of more than 80% of epithelioid cells with atypia, often associated with necrosis, hemorrhage, mitotic activity and vascular invasion...
March 16, 2017: Annales de Pathologie
https://www.readbyqxmd.com/read/28317591/renal-myolipoosteoma-a-distinctive-lesion-in-a-child
#3
REVIEW
Hongbiao Jing, Tailing Li, Shujian Zhai, Yan Xi, Qingda Meng
We describe a distinctive renal tumor, a myolipoosteoma (MLO), in an 11-year-old boy who presented with a 6-month history of slight right flank intermittent pain. A gross examination revealed a well-defined, 5.5 cm mass with bone-like consistency. The lesion histologically featured an admixture of mature adipose tissue, spindle cells, and bony components. No atypia, mitotic activity, or pleomorphisms were observed in the tumor. The spindle cells were smooth muscle actin (SMA) and desmin positive but HMB45 and Melan-A negative, indicating that they were of a muscular nature and differed from that of angiomyolipoma (AML)...
March 2017: Surgical Oncology
https://www.readbyqxmd.com/read/28302901/treatment-of-renal-angiomyolipoma-and-other-hamartomas-in-patients-with-tuberous-sclerosis-complex
#4
REVIEW
Joshua A Samuels
Tuberous sclerosis complex is an autosomal dominant genetic disease characterized by growth of benign tumors (hamartomas) in multiple organs, especially the kidneys, brain, heart, lungs, and skin. Tuberous sclerosis complex is usually caused by a mutation in either the tuberous sclerosis complex 1 or tuberous sclerosis complex 2 gene, resulting in constitutive activation of mammalian target of rapamycin signaling. Currently, mammalian target of rapamycin inhibitors are recommended in adult patients with tuberous sclerosis complex for the treatment of asymptomatic, growing renal angiomyolipoma that are >3 cm in diameter and pediatric or adult patients with brain lesions (subependymal giant cell astrocytoma) that either are growing or are not amenable to surgical resection...
March 16, 2017: Clinical Journal of the American Society of Nephrology: CJASN
https://www.readbyqxmd.com/read/28301898/epithelioid-angiomyolipoma-of-the-liver-a-case-report
#5
Soo Yeon Lee, Baek-Hui Kim
Epithelioid angiomyolipoma (EAML) of liver is a rare neoplasm. Hepatic EAML is often misdiagnosed as other neoplasms such as hepatocellular carcinoma due to non-specific clinical and radiologic features. The morphologic features under microscope and immunohistochemistry staining profile are important in the diagnosis EAML. Here, we report a case of 52-year-old man who found 1.2 cm mass in liver by routine checkup. On the impression of hepatocellular carcinoma, lateral sectionectomy of the liver was done. Microscopically, the tumor is composed of predominant epithelioid cells with vascular component and foamy cells...
March 17, 2017: Clinical and Molecular Hepatology
https://www.readbyqxmd.com/read/28299630/the-role-of-interventional-radiology-techniques-in-the-management-of-renal-angiomyolipomas
#6
REVIEW
Ryan M Kiefer, S William Stavropoulos
PURPOSE OF REVIEW: Although benign, renal angiomyolipoma (AML) may lead to serious complications without appropriate management. The purpose of this review is to describe the role of and evidence for interventional radiology techniques in the management of patients with AML. RECENT FINDINGS: For patients with renal masses and non-diagnostic imaging studies, image-guided percutaneous biopsy is found to be highly accurate and useful in directing patient management...
May 2017: Current Urology Reports
https://www.readbyqxmd.com/read/28298732/imaging-of-tuberous-sclerosis-complex-a-pictorial-review
#7
Felipe Mussi von Ranke, Igor Murad Faria, Gláucia Zanetti, Bruno Hochhegger, Arthur Soares Souza, Edson Marchiori
Tuberous sclerosis complex (TSC) is a genetically determined hamartomatous neurocutaneous disease with high phenotypic variability. TSC is characterized by widespread hamartomas and benign, or rarely malignant, neoplasms distributed in several organs throughout the body, especially in the brain, skin, retina, kidney, heart, and lung. Common manifestations include cortical tubers, subependymal nodules, white matter abnormalities, retinal abnormalities, cardiac rhabdomyoma, lymphangioleiomyomatosis, renal angiomyolipoma, and skin lesions...
January 2017: Radiologia Brasileira
https://www.readbyqxmd.com/read/28291715/elective-and-emergency-renal-angiomyolipoma-embolization-with-ethylene-vinyl-alcohol-copolymer-feasibility-and-initial-experience
#8
José Urbano, Laura Paul, Manuel Cabrera, Alberto Alonso-Burgos, Daniella Gómez
PURPOSE: To report preliminary experience with angiomyolipoma (AML) transcatheter arterial embolization using ethylene vinyl alcohol (EVOH) copolymer liquid embolic agent. MATERIALS AND METHODS: Embolization was performed in 22 consecutive patients (mean age, 53.5 y; 16 women and 6 men) for symptomatic AMLs or AMLs > 4 cm. Mean AML size before treatment was 7 cm (range, 3.5-13 cm). Superselective embolization of all lesions using microcatheters was performed; EVOH copolymer was the only embolic agent used...
March 10, 2017: Journal of Vascular and Interventional Radiology: JVIR
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
#9
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/28275556/selective-arterial-embolization-of-symptomatic-and-asymptomatic-renal-angiomyolipomas-a-retrospective-study-of-safety-outcomes-and-tumor-size-reduction
#10
Florian Bardin, Olivier Chevallier, Aurélie Bertaut, Emmanuel Delorme, Morgan Moulin, Pierre Pottecher, Lucy Di Marco, Sophie Gehin, Eric Mourey, Luc Cormier, Christiane Mousson, Marco Midulla, Romaric Loffroy
BACKGROUND: Angiomyolipoma (AML) is the most common renal benign tumor. Treatment should be considered for symptomatic patients or for those at risk for complications, especially retroperitoneal bleeding which is correlated to tumor size, grade of the angiogenic component and to the presence of tuberous sclerosis complex (TSC). This study reports our single-center experience with the use of selective arterial embolization (SAE) in the management of symptomatic and asymptomatic renal AMLs...
February 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/28275008/pparg-is-central-to-the-initiation-and-propagation-of-human-angiomyolipoma-suggesting-its-potential-as-a-therapeutic-target
#11
Oren Pleniceanu, Racheli Shukrun, Dorit Omer, Einav Vax, Itamar Kanter, Klaudyna Dziedzic, Naomi Pode-Shakked, Michal Mark-Daniei, Sara Pri-Chen, Yehudit Gnatek, Hadas Alfandary, Nira Varda-Bloom, Dekel D Bar-Lev, Naomi Bollag, Rachel Shtainfeld, Leah Armon, Achia Urbach, Tomer Kalisky, Arnon Nagler, Orit Harari-Steinberg, Jack L Arbiser, Benjamin Dekel
Angiomyolipoma (AML), the most common benign renal tumor, can result in severe morbidity from hemorrhage and renal failure. While mTORC1 activation is involved in its growth, mTORC1 inhibitors fail to eradicate AML, highlighting the need for new therapies. Moreover, the identity of the AML cell of origin is obscure. AML research, however, is hampered by the lack of in vivo models. Here, we establish a human AML-xenograft (Xn) model in mice, recapitulating AML at the histological and molecular levels. Microarray analysis demonstrated tumor growth in vivo to involve robust PPARG-pathway activation...
March 8, 2017: EMBO Molecular Medicine
https://www.readbyqxmd.com/read/28272193/pelvic-lymphangioleiomyomatosis-treated-successfully-with-everolimus-two-case-reports-with-literature-review
#12
Sharjil Wahid, Ping Chia Chiang, Hao Lun Luo, Shun-Chen Huang, Eing-Mei Tsai, Po Hui Chiang
BACKGROUND: Lymphangioleiomyomatosis (LAM) is a rare disease affecting young women caused by abnormal proliferation of smooth muscle-like cells (LAM cells) in the lungs and extrapulmonary sites (extrapulmonary LAM). The objective of this case series is to demonstrate marked regression in 2 cases of retroperitoneal LAM after treatment with everolimus, an mTOR inhibitor. METHODS: We enrolled 2 cases with large volume, extrapulmonary pelvic LAM, and evaluated them with contrast-enhanced abdominal computed tomographic (CT) scans at presentation and serially during treatment with everolimus...
March 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28268233/does-computed-tomography-still-have-limitations-to-distinguish-benign-from-malignant-renal-tumors-for-radiologists
#13
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/28265590/laparoscopic-retroperitoneal-nephron-sparing-surgery-without-renal-artery-clamping-with-preoperative-selective-arterial-embolization-for-management-of-right-renal-angiomyolipoma-of-diameter-10-cm-a-case-report
#14
Tatsuhiko Hoshii, Shinichi Morita, Yohei Ikeda, Go Hasegawa, Tsutomu Nishiyama
A 38-year-old female without the tuberous sclerosis complex was diagnosed with right renal angiomyolipoma of 10 cm in diameter. She underwent laparoscopic retroperitoneal nephron-sparing surgery without renal artery clamping with preoperative selective arterial embolization to avoid a significant risk of hemorrhage and the damage of the renal function during nephron-sparing surgery. The tumor was resected completely. The time taken to complete the procedure was 4 hours 11 minutes and blood loss was 780 mL...
2017: Journal of Endourology Case Reports
https://www.readbyqxmd.com/read/28263820/patterns-of-disease-monitoring-and-treatment-among-patients-with-tuberous-sclerosis-complex-related-angiomyolipomas
#15
Elyse Swallow, Sarah King, Jinlin Song, Miranda Peeples, James E Signorovitch, Zhimei Liu, Judith Prestifilippo, Michael Frost, Michael Kohrman, Bruce Korf, Darcy Krueger, Steven Sparagana
OBJECTIVE: To use the tuberous sclerosis complex (TSC) Natural History Database to describe monitoring and treatment patterns among patients with TSC-related angiomyolipomas (AMLs). METHODS: This study used the TSC Natural History Database, which contains demographics, affected areas, diagnosis, and treatments for more than 1300 patients with TSC enrolled in 16 participating clinics during 2006-2013. Patient characteristics, AML monitoring tests, and AML treatments were assessed...
March 2, 2017: Urology
https://www.readbyqxmd.com/read/28260171/renal-tumors-with-low-signal-intensities-on-t2-weighted-mr-image-radiologic-pathologic-correlation
#16
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/28246920/primary-perivascular-epithelioid-cell-tumors-of-the-liver-ct-mri-findings-and-clinical-outcomes
#17
Martin E O'Malley, Tanya P Chawla, Lisa P Lavelle, Sean Cleary, Sandra Fischer
OBJECTIVES: The purpose of our study was to describe the CT and MRI features of primary PEComas of the liver and to document the associated clinical outcomes. METHODS: Retrospective study included 20 patients with primary hepatic perivascular epithelioid cell tumors (PEComa) with pathology and clinical outcomes for correlation. RESULTS: Study group included 20 patients: 16 women, 4 men; mean age 53 (range 35-77) years. Initial pathology diagnoses were classic angiomyolipoma (AML) (n = 11), epithelioid AML (n = 7), and PEComa not otherwise specified (n = 2)...
February 28, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28246523/re-distinguishing-between-renal-cell-carcinoma-and-fat-poor-angiomyolipoma-in-diffusion-weighted-imaging
#18
COMMENT
Ali Kemal Sivrioglu, Serkan Arıbal, Önder Hakan
No abstract text is available yet for this article.
March 2017: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/28237279/diagnosis-of-renal-angiomyolipomas-classic-fat-poor-and-epithelioid-types
#19
Masahiro Jinzaki, Stuart G Silverman, Hirotaka Akita, Shuji Mikami, Mototsugu Oya
With the increasing discovery of small renal masses with cross-sectional imaging, there has been the concomitant rise in their treatment. With the intent of early curative surgery for a presumed renal cell carcinoma, many renal masses are being resected at surgery without a confirmed diagnosis. Many of them are benign, and some are angiomyolipomas. The diagnosis of renal angiomyolipoma using imaging is, therefore, is as important as ever. Although most, if not all angiomyolipomas with abundant fat are diagnosed readily, some have too little fat to be detected with imaging...
February 2017: Seminars in Ultrasound, CT, and MR
https://www.readbyqxmd.com/read/28237278/differentiation-of-small-solid-renal-masses-a-pattern-recognition-approach
#20
Sungmin Woo, Seung Hyup Kim
The incidence of small renal masses (SRMs) has shown significant increase owing to more widespread use of cross-sectional imaging. These SRMs include various subtypes of renal cell carcinomas (RCCs) and several types of benign tumors including angiomyolipomas. Differentiation between RCC and benign SRMs is crucial for a patient to receive optimal management. Therefore, it is important for the radiologist to recognize imaging patterns that are characteristic of or diffferentiate between RCCs and benign SRMs, when confronting a SRM...
February 2017: Seminars in Ultrasound, CT, and MR
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