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Head and neck radiology

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https://www.readbyqxmd.com/read/28231582/radiomics-in-head-and-neck-cancer-extracting-valuable-information-from-data-beyond-recognition
#1
Kathrin Scheckenbach, Lena Colter, Martin Wagenmann
In oncology, biomarkers that describe the characteristics of a malignancy on different levels (clinical, histological, molecular) and the patient's outcome and treatment response are increasingly integrated into the clinical routine. Extensive screening tools, "omics," offer incredible opportunities and vast amounts of data. During the last years, the field of "omics" gained a new promising partner, the "radiomics." Based on radiological imaging, multiple features can be extracted and linked to clinical, genomic, and histopathological data from other sources...
February 24, 2017: ORL; Journal for Oto-rhino-laryngology and its related Specialties
https://www.readbyqxmd.com/read/28230919/maxillary-ameloblastoma-factors-associated-with-risk-of-recurrence
#2
Rong Yang, Zheqi Liu, Canbang Peng, Wei Cao, Tong Ji
BACKGROUND: Maxillary ameloblastomas are rare and associated with an aggressive course because of the anatomic composition of the maxilla and adjacent structures. The risk factors associated with recurrence were analyzed in this retrospective study. METHODS: Cases of maxillary ameloblastoma reported in a tertiary hospital from 2005 to 2015 were analyzed to identify clinicopathological and radiological factors associated with recurrence using univariate and multivariate Cox regression analyses...
February 23, 2017: Head & Neck
https://www.readbyqxmd.com/read/28210801/patient-radiation-doses-and-reference-levels-in-pediatric-interventional-radiology
#3
Bouchra Habib Geryes, Adeline Bak, Julie Lachaux, Augustin Ozanne, Nathalie Boddaert, Francis Brunelle, Olivier Naggara, Guillaume Saliou
OBJECTIVES: To describe, in a multicentric paediatric population, reference levels (RLs) for three interventional radiological procedures. METHODS: From January 2012 to March 2015, children scheduled for an interventional radiological procedure in two French tertiary centres were retrospectively included and divided into four groups according to age: children younger than 2 years (A1), aged 2-7 years (A5), 8-12 years (A10) and 13-18 years (A15). Three procedures were identified: cerebral digital subtraction angiography (DSA), brain arteriovenous malformation (bAVM) embolization, and head and neck superficial vascular malformation (SVM) percutaneous sclerotherapy...
February 16, 2017: European Radiology
https://www.readbyqxmd.com/read/28167693/primary-gastric-plasmacytoma-a-rare-entity
#4
Rui Caetano Oliveira, Pedro Amaro, Maria José Julião, Maria Augusta Cipriano
Extramedullary plasmacytomas (EP) are tumours composed by a monoclonal population of plasma cells that arise in extraosseus tissues, comprising <5% of all plasma cell neoplasms. Usually, EP arise in the head and neck region, and the stomach is the second most common location-gastric plasmacytoma (GP). Clinical and radiological manifestations are unspecific and may mimic other tumours like gastric adenocarcinomas, gastric stromal tumours and lymphomas, mainly marginal cell lymphoma (MALT lymphoma) and usually definitive diagnosis is provided by pathological evaluation...
February 6, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28166167/stepwise-percutaneous-leverage-technique-to-avoid-posterior-interosseous-nerve-injury-in-pediatric-radial-neck-fracture
#5
Wan-Sun Choi, Kyeong-Jin Han, Doo-Hyung Lee, Ga-Eun Lee, Heon-Ju Kweon, Jae-Ho Cho
OBJECTIVES: To introduce a stepwise percutaneous leverage technique to avoid posterior interosseous nerve (PIN) injury in pediatric patients with radial neck fractures and to evaluate the clinical outcome and the predisposing factors affecting the outcome. DESIGN: Retrospective case series study. SETTING: University level 1 trauma center. PATIENTS: Thirty-four children with a radial neck fracture, who were treated using a stepwise percutaneous leverage technique, were included in the study...
January 24, 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28162883/posterior-open-wedge-osteotomy-of-the-scapula-neck-for-the-treatment-of-advanced-shoulder-osteoarthritis-with-posterior-head-migration-in-young-patients
#6
Reinhold Ortmaier, Philipp Moroder, Corinna Hirzinger, Herbert Resch
BACKGROUND: Treatment of young, active patients with symptomatic glenohumeral osteoarthritis, excessive glenoid retroversion, and static posterior humeral subluxation is challenging. Correction of glenoid retroversion may lead to centric loading and perhaps recenter the humeral head. We describe the functional and radiologic outcomes after corrective osteotomy of the glenoid in this population of patients. MATERIALS AND METHODS: In this retrospective study, we included 10 shoulders (8 patients) that were observed for a mean of 33...
February 2, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28162264/nonfunctioning-small-incidental-pancreatic-neuroendocrine-tumors-results-of-a-nonoperative-approach-cohort
#7
Catalina Uribe Galeano, Joan Fabregat Prous, Juli Busquets Barenys, Nuria Pelaez Serra, Lluís Secanella Medayo, Emilio Ramos Rubio, Sandra Ruiz Osuna, Carlos Villabona Artero
OBJECTIVE: The availability of new imaging techniques has conditioned an increase in the incidental diagnosis of small nonfunctioning pancreatic neuroendocrine tumors (PNET-NF). The best treatment is controversial, some authors advise a conservative approach in selected cases. Our aim is to analyze the evolution of incidental, small size PNET-NF, treated with clinical follow-up without surgery. METHODS: We performed a retrospective analysis of a prospective database of patients diagnosed incidentally with PNET-NF since November 2007 to September 2015...
February 2, 2017: Cirugía Española
https://www.readbyqxmd.com/read/28153757/sinonasal-hemangioma-diagnosis-treatment-and-follow-up-of-37-patients-at-a-single-center
#8
Jong Seung Kim, Sam Hyun Kwon
PURPOSE: Hemangioma is a common benign vascular lesion of the head and neck region. It rarely involves the mucous membranes of the nasal cavity and paranasal sinuses. It should be added to the differential diagnosis of nasal cavity masses when the presenting symptoms are epistaxis or nasal obstruction. MATERIALS AND METHODS: A retrospective chart review was conducted of a histologic diagnosis of lobular capillary hemangioma or cavernous hemangioma of the sinonasal mucous membranes treated at the Chonbuk National University Hospital from January 1995 through December 2015...
January 5, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28149187/biochemical-analysis-and-bone-remodeling-in-response-to-oophorectomy-and-aquatic-training
#9
Helena Ribeiro Souza, Ana Paula Girol, Adriana Paula Sanchez Schiaveto, Mairto Roberis Geromel, Melina Mizusaki Iyomasa, Maurício Ferraz DE Arruda
OBJECTIVE: To investigate whether swimming could prevent bone loss and could be indicated to assist in treatment of osteoporosis. METHODS: Female rats were divided into 4 groups (n=6), two of them were oophorectomized. Animals from two groups, one oophorectomized and another not oophorectomized, underwent aquatic training for eight weeks. After training, the animals were sacrificed and their blood was collected for calcium and alkaline phosphatase serum dosage; the femur was removed and subjected to radiological and histological densitometry analysis to assess bone loss and osteoclast counting on femoral head and neck...
September 2016: Acta Ortopedica Brasileira
https://www.readbyqxmd.com/read/28140608/rosai-dorfman-disease-manifestations-outside-of-the-head-and-neck
#10
Winnie A Mar, Jonathan H Yu, Martha Gracia Knuttinen, Jeanne M Horowitz, Odile David, Andrew Wilbur, Christine O Menias
OBJECTIVE: Rosai-Dorfman disease (RDD) is an uncommon benign histiocytic disorder. Extranodal involvement occurs in 43% and most commonly involves the head and neck, skin, and bones. We review less common imaging findings outside the head and neck. CONCLUSION: The imaging manifestations of RDD overlap with a variety of neoplastic and nonneoplastic conditions. Confirmation of an RDD diagnosis is based on specific histologic features. Radiologic assessment is used to rule out multifocality on initial workup and to evaluate treatment response...
January 31, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28109633/the-american-college-of-radiology-and-the-american-brachytherapy-society-practice-parameter-for-the-performance-of-low-dose-rate-brachytherapy
#11
Akila N Viswanathan, Beth A Erickson, Geoffrey S Ibbott, William Small, Patricia J Eifel
Brachytherapy is the use of radionuclides to treat malignancies or benign conditions by means of a radiation source placed close to or into the tumor or treatment site. This practice parameter refers only to the use of radionuclide brachytherapy. Brachytherapy alone or combined with external beam therapy plays an important role in the management and treatment of patients with cancer. Low-dose-rate (LDR) brachytherapy has traditionally been used for treating prostate, head and neck, breast, cervical, and endometrial cancers as well as obstructive bile duct, esophageal, or bronchial lesions...
January 2017: Brachytherapy
https://www.readbyqxmd.com/read/28107235/an-experimental-biomechanical-study-on-artificial-atlantoodontoid-joint-replacement-in-dogs
#12
Quanjin Zang, Yanming Liu, Dengfeng Wang, Haopeng Li, Pinglin Yang, Dong Wang, Xijing He
STUDY DESIGN: This study tested the biomechanics of artificial atlantoodontoid joint replacement (AAOJR) in a dog model. Dogs were divided into the artificial AAOJR group (n=10), the decompression group (n=10), and the healthy control group (n=10) using a random number table. OBJECTIVE: To evaluate whether the use of AAOJR for repair of atlantoaxial instability retains rotation and restores stability. SUMMARY OF BACKGROUND DATA: Atlantoaxial instability is characterized by excessive movement or laxity at the junction between the atlas (C1) and axis (C2)...
February 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28105364/disseminated-penicillium-marneffei-infection-recurrence-in-a-non-acquired-immune-deficiency-syndrome-patient-a-case-report
#13
Zhixue Zhang, Fangxu Tao, Yining Li, Yudong Xiao, Zhishu Zhang, Jun Liu
Penicillium marneffei is a rare deep tissue fungal infection causing an endemic in Southeast Asia. This infection causes penicilliosis disease and is more common in patients who are immunocompromised. To date, no cases of P. marneffei infection relapse following treatment have been reported. A 36-year-old patient attended our hospital as a result of intermittent fever, cough, shortness of breath and multiple soft lesions located on the face, arms, neck and trunk. The medical radiological examination of the lung revealed multiple patchy exudative shadows, thick-walled hollow inner part of the visible lesions, bilateral pleural and pericardial effusion...
December 2016: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/28103943/a-primary-pure-pancreatic-type-acinar-cell-carcinoma-of-the-stomach-a-case-report
#14
Kyoung Min Kim, Chan Young Kim, Seung-Mo Hong, Kyu Yun Jang
BACKGROUND: Acinar cell carcinoma represents only 1-2% of exocrine pancreatic neoplasms. On exceptionally rare occasions, primary acinar cell carcinoma can occur in ectopic locations. Herein, we report a case of pure pancreatic-type acinar cell carcinoma arising in the stomach. CASE PRESENTATION: A 54-year-old male presented with a gastric submucosal mass detected by endoscopic examination. Laparoscopic wedge resection was performed. Macroscopically, the 2.7 cm yellowish mass was located in the submucosa of the stomach...
January 19, 2017: Diagnostic Pathology
https://www.readbyqxmd.com/read/28100198/mr-imaging-for-detection-of-trampoline-injuries-in-children
#15
E Hauth, H Jaeger, P Luckey, M Beer
BACKGROUND: The recreational use of trampolines is an increasingly popular activity among children and adolescents. Several studies reported about radiological findings in trampoline related injuries in children. The following publication presents our experience with MRI for detection of trampoline injuries in children. METHODS: 20 children (mean 9.2 years, range: 4-15 years) who had undergone an MRI study for detection of suspected trampoline injuries within one year were included...
January 18, 2017: BMC Pediatrics
https://www.readbyqxmd.com/read/28087093/audiologic-and-radiologic-findings-in-cochlear-hypoplasia
#16
Betul Cicek Cinar, Merve Ozbal Batuk, Emel Tahir, Gonca Sennaroglu, Levent Sennaroglu
OBJECTIVE: The aim of the current study is to evaluate audiologic and radiologic findings of cochlear hypoplasia which is a subgroup of inner ear malformations. METHODS: This study was a prospective clinical study and based on voluntary participation from cases with cochlear hypoplasia diagnosis. The study was conducted at Hacettepe University, Department of Otolaryngology, Head and Neck Surgery and Department of Audiology. Subjects were selected from an inner ear malformations database...
January 10, 2017: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/28081584/-mini-open-approach-shows-good-results-in-treatment-of-femoroacetabular-impingement
#17
Stephanie Maria Kirschbaum, Frank Sitterlee, Carsten Perka, Michael Müller
Background Femoroacetabular impingement (FAI) describes a painful, abnormal (bony) contact between the femoral neck and acetabulum, which, if left untreated, contributes to early osteoarthritis (OA) of the hip. Despite its flat learning curve and long operation times, hip arthroscopy has been used increasingly often in recent years in the surgery of femoroacetabular impingement. The mini-open technique (MOT) offers a possible alternative that addresses the abnormal morphological prominence and allows minimally invasive clearance of hip motion...
January 12, 2017: Zeitschrift Für Orthopädie und Unfallchirurgie
https://www.readbyqxmd.com/read/28059707/ct-accuracy-of-extrinsic-tongue-muscle-invasion-in-oral-cavity-cancer
#18
J C Junn, K L Baugnon, E A Lacayo, P A Hudgins, M R Patel, K R Magliocca, A S Corey, M El-Deiry, J T Wadsworth, J J Beitler, N F Saba, Y Liu, A H Aiken
BACKGROUND AND PURPOSE: Extrinsic tongue muscle invasion in oral cavity cancer upstages the primary tumor to a T4a. Despite this American Joint Committee on Cancer staging criterion, no studies have investigated the accuracy or prognostic importance of radiologic extrinsic tongue muscle invasion, the feasibility of standardizing extrinsic tongue muscle invasion reporting, or the degree of agreement across different disciplines: radiology, surgery, and pathology. The purpose of this study was to assess the agreement among radiology, surgery, and pathology for extrinsic tongue muscle invasion and to determine the imaging features most predictive of extrinsic tongue muscle invasion with surgical/pathologic confirmation...
November 10, 2016: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28048590/we-ab-brb-03-real-time-volumetric-scintillation-dosimetry-for-radiation-therapy
#19
S Beddar
: Despite widespread IMRT treatments at modern radiation therapy clinics, precise dosimetric commissioning of an IMRT system remains a challenge. In the most recent report from the Radiological Physics Center (RPC), nearly 20% of institutions failed an end-to-end test with an anthropomorphic head and neck phantom, a test that has rather lenient dose difference and distance-to-agreement criteria of 7% and 4 mm. The RPC report provides strong evidence that IMRT implementation is prone to error and that improved quality assurance tools are required...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048141/su-f-j-153-acr-mri-phantom-test-on-a-1-5t-mr-simulator-with-flexible-coils-setting-and-performance-comparison-to-volumetric-head-coil-setting
#20
J Yuan, O Wong, K Cheung, S Yu
PURPOSE: To accommodate head-and-neck (HN) RT simulation scan with immobilization, sub-optimized flexible radiofrequency coils have to be used on an MR-sim rather than a volumetric head coil for diagnostic radiological (DR) applications. In this study, we present and compare ACR MRI phantom test with flexible coils setting (RT-setting) and volumetric head coil setting (DR-setting). METHODS: Two 8-channel array coils were wrapped close to an ACR MRI phantom placed on a flat couch-top in RT-setting for acquisition...
June 2016: Medical Physics
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