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https://www.readbyqxmd.com/read/28530767/diagnostic-evaluation-of-upper-extremity-masses-and-tumors
#1
Andrew R Tyser, Patrick A Holt, R Lor Randall
The appropriate evaluation of hand and upper extremity masses is an important aspect of the care of orthopedic patients. Although most of these masses are benign, the orthopedic surgeon must have a high index of suspicion when assessing them because early diagnosis and treatment of aggressive or malignant masses may have a great effect on patient outcomes. This article provides an overview of benign and malignant osseous and soft tissue masses that orthopedic surgeons may encounter and a detailed algorithm for evaluating these masses...
May 20, 2017: Orthopedics
https://www.readbyqxmd.com/read/28530205/phantom-experiments-using-soft-prior-regularization-eit-for-breast-cancer-imaging
#2
Ethan K Murphy, Aditya Mahara, Xiaotian Wu, Ryan J Halter
OBJECTIVE: A soft-prior regularization (SR) electrical impedance tomography (EIT) technique for breast cancer imaging is described, which shows an ability to accurately reconstruct tumor/inclusion conductivity values within a dense breast model investigated using a cylindrical and a breast-shaped tank. APPROACH: The SR-EIT method relies on knowing the spatial location of a suspicious lesion initially detected from a second imaging modality. Standard approaches (using Laplace smoothing and total variation regularization) without prior structural information are unable to accurately reconstruct or detect the tumors...
June 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28530162/radiation-induced-glandular-malignant-peripheral-nerve-sheath-tumor
#3
Ivy John, David L Bartlett, Uma N M Rao
Malignant peripheral nerve sheath tumors (MPNSTs) are aggressive soft-tissue tumors. They can occur in patients with neurofibromatosis type-1 (NF-1) or as sporadic tumors. Only 10% of MPNSTs are radiation induced. Divergent differentiation in MPNSTs can occur in 15% of cases and may include cartilage, bone, skeletal muscle, blood vessels, and very rarely well-formed glands, the latter typically described in NF-1-associated MPNSTs. We report an exceedingly rare case of radiation induced glandular MPNST arising in a neurofibroma of the femoral nerve in a patient previously irradiated for endometrial carcinoma...
May 1, 2017: International Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28526004/hybrid-peripheral-nerve-sheath-tumors-report-of-five-cases-and-detailed-review-of-literature
#4
Nasir Ud Din, Zubair Ahmad, Jamshid Abdul-Ghafar, Rashida Ahmed
BACKGROUND: Hybrid peripheral nerve sheath tumors (PNSTs) have been recognized recently and were first included in the 4th edition of World Health Organization (WHO) Classification of Tumors of Soft tissue and Bone, published in 2013. These tumors show combined features of more than one type of conventional benign peripheral nerve sheath tumors. The most common combinations are those of schwannoma/perineurioma followed by combinations of neurofibroma/schwannoma and neurofibroma/perineurioma...
May 19, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28525423/congenital-infantile-fibrosarcoma-associated-with-a-lipofibromatosis-like-component-one-train-may-be-hiding-another
#5
Romain Swiadkiewicz, Louise Galmiche, Kahina Belhous, Olivia Boccara, Sylvie Fraitag, Florence Pedeutour, Bérangère Dadone, Jacques Buis, Arnaud Picard, Daniel Orbach, Natacha Kadlub
Congenital infantile fibrosarcoma (CIFS) is a soft tissue sarcoma of infants mainly involving lower extremities and usually developing during the first year of life. At another end of the spectrum of pediatric fibroblastic lesions, lipofibromatosis is a rare benign infiltrative soft tissue tumor that affects children. The authors report in this study a particular presentation with a CIFS surrounded by lipofibromatosis-like areas. The presence of a surrounding benign tumor confused and delayed CIFS diagnosis...
June 2017: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/28523875/mimickers-of-infantile-hemangiomas
#6
Ross M Brockman, Stephen R Humphrey, David C Moe, Paula E North, David M King, John N Jensen, Dawn H Siegel, Beth A Drolet
Infantile hemangiomas (IHs) are the most common tumors of infancy and usually follow a typical course of growth and involution. We report four soft tissue tumors that were referred to the pediatric dermatology clinic as IHs and the process by which they were diagnosed and treated. Clinicians should be aware of presentations of these uncommon, but serious soft tissue tumors. Many of these mimickers have a vastly different clinical prognosis, and early intervention to limit sequelae is crucial. Biopsy of atypical lesions should be considered early in the diagnostic process since they have varied prognosis and treatment strategies...
May 2017: Pediatric Dermatology
https://www.readbyqxmd.com/read/28522188/an-update-on-myofibromas-and-myofibromatosis-affecting-the-oral-regions-with-report-of-24-new-cases
#7
Molly Housley Smith, John D Reith, Donald M Cohen, Nadim M Islam, Kimberly T Sibille, Indraneel Bhattacharyya
OBJECTIVES: Myofibromas are uncommon soft tissue tumors exhibiting considerable histopathologic overlap with other benign and malignant entities. The treatment of lesions arising in the oral cavity is controversial. Here, we present 24 new cases and review the literature. STUDY DESIGN: A search for oral myofibromas was performed within the archives of the University of Florida Oral Pathology and Surgical Pathology Services (1994-2015). Demographic information and immunohistochemical results were recorded...
April 5, 2017: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/28521631/immunohistochemical-profile-of-myc-protein-in-pediatric-small-round-blue-cell-tumors
#8
Karen M Chisholm, Chandra Krishnan, Amy Heerema-McKenney, Yasodha Natkunam
Deregulation of MYC oncoprotein in cancers can result from multiple oncogenic mechanisms. Although MYC translocations define Burkitt lymphoma and MYC protein expression is a poor prognostic factor in undifferentiated neuroblastomas, the distribution of MYC protein (c-MYC) across other pediatric small round blue cell tumors (SRBCT) has not been well characterized. We undertook this study to assess MYC protein expression in a large cohort of pediatric lymphomas, sarcomas, and other SRBCT. Tissue microarrays containing 302 SRBCT were successfully evaluated by immunohistochemistry using anti-MYC clone Y69, with nuclear positivity scored as 0%, 1%-25%, 26%-50%, 51%-75%, or 76%-100%...
June 2017: Pediatric and Developmental Pathology
https://www.readbyqxmd.com/read/28521439/arteriovenous-malformation-and-thyroid-metastasis-from-underlying-renal-cell-carcinoma-an-unusual-presentation-of-malignancy-a-case-report
#9
H J Albandar, E S Roberto, J R H See, J H Sabiers
Renal Clear Cell Carcinoma (RCC) comprises over 80% of renal malignancies in adults. Thyroid gland metastasis is rare in RCC. Few studies have described cases of RCC mistaken for benign arteriovenous malformation (AVM). To the best of our knowledge, an AVM arising from underlying RCC metastasis to the brain has not yet been reported. The current study presents a case of RCC metastasis to the thyroid gland, with an AVM identified to be a result of metastatic involvement in the brain. A 45-year-old African-American female presented with left-sided weakness, slurred speech, facial droop and seizure...
May 2017: Oncology Letters
https://www.readbyqxmd.com/read/28521298/insulin-like-growth-factor-2-axis-supports-the-serum-independent-growth-of-malignant-rhabdoid-tumor-and-is-activated-by-microenvironment-stress
#10
Ting Li, Jin Wang, Pengfei Liu, Jiadong Chi, Han Yan, Lei Lei, Zexing Li, Bing Yang, Xi Wang
Malignant rhabdoid tumors (MRTs) are rare, lethal, pediatric tumors predominantly found in the kidney, brain and soft tissues. MRTs are driven by loss of tumor suppressor SNF5/INI1/SMARCB1/BAF47. The prognosis of MRT is poor using currently available treatments, so new treatment targets need to be identified to expand treatment options for patients experiencing chemotherapy resistance. The growth hormone insulin-like growth factor 2 (IGF2) signaling pathway is a promising target to overcome drug resistance in many cancers...
May 4, 2017: Oncotarget
https://www.readbyqxmd.com/read/28515258/evolving-treatment-of-soft-tissue-sarcoma
#11
Suzanne George
Soft tissue sarcomas comprise multiple histologic subtypes, occur at a number of anatomic sites, and require individualized treatment. Over the past 5 years, 4 new drugs were approved for sarcoma, most of which are driven by histology or the anticipated response to treatment. Surgical resection remains the primary treatment for resectable tumors. For unresectable or metastatic disease, doxorubicin remains the backbone of chemotherapy, but other agents have improved on its single-agent efficacy. Chief among them is olaratumab, which, in combination with doxorubicin, is preferred over doxorubicin alone in the updated NCCN Clinical Practice Guidelines in Oncology for Soft Tissue Sarcoma...
May 2017: Journal of the National Comprehensive Cancer Network: JNCCN
https://www.readbyqxmd.com/read/28514296/clinicopathological-features-and-differential-diagnosis-of-aggressive-angiomyxoma-of-the-female-pelvis-5-case-reports-and-literature-review
#12
Hong Chen, Hongyan Zhao, Yan Xie, Mulan Jin
Aggressive angiomyxoma (AAM) is a rare mesenchymal tumor that usually occurs in the pelvis and perineum of young females. AAM can simulate Bartholin's gland cyst, abscess, lipoma, simple labial cyst, or other pelvic soft tissue tumors. Here we present five cases of AAM with mean age of 42. The patients mainly presented slow-growing mass in the abdomen and perineum (3 cases in the pelvis, 1 in the vulva, and 1 in the buttock). Color Doppler flow imaging revealed blood flow for the 3 pelvic lesions. Enhanced computed tomography and magnetic resonance imaging of the other 2 cases showed the typical "swirled" or "layered" structure characteristic...
May 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28512414/an-intra-abdominal-desmoid-tumor-embedded-in-the-pancreas-preoperatively-diagnosed-as-an-extragastric-growing-gastrointestinal-stromal-tumor
#13
Mari Mizuno, Yoshiaki Kawaguchi, Aya Kawanishi, Yohei Kawashima, Atsuko Maruno, Masami Ogawa, Mifuji Tomioku, Daisuke Furukawa, Kazuhito Nabeshima, Kenji Nakamura, Kenichi Hirabayashi, Tetsuya Mine
A 45-year-old woman was found to have a pancreatic tumor by abdominal ultrasound performed for a medical check-up. Abdominal contrast-enhanced computed tomography showed a hypovascular tumor measuring 30 mm in diameter in the pancreatic tail. Endoscopic ultrasound-guided fine needle aspiration was performed. An extragastric growing gastrointestinal stromal tumor was thereby diagnosed preoperatively, and surgical resection was planned. Laparoscopic surgery was attempted but conversion to open surgery was necessitated by extensive adhesions, and distal pancreatectomy, splenectomy, and partial gastrectomy were performed...
January 2017: Case Reports in Oncology
https://www.readbyqxmd.com/read/28511831/obstructive-sleep-apnea-and-dermatologic-disorders
#14
Madhulika A Gupta, Fiona C Simpson, Branka Vujcic, Aditya K Gupta
Obstructive sleep apnea (OSA) is present in at least 2% of women and 4% of men, and its prevalence is increasing, because a major predisposing factor for OSA is a high body mass index. Psoriasis has the most strongly substantiated link with OSA, where the relationship may be bidirectional. Dermatologic disorders may be comorbid with OSA due to several factors: (i) the heightened proinflammatory state in OSA, which can occur independent of body mass index, and may exacerbate inflammatory dermatoses; (ii) intermittent hypoxemia may promote neovascularization and tumor growth in certain cancers, such as melanoma; (iii) obesity, present in majority of OSA patients, can be associated with a heightened proinflammatory state; (iv) upper airway obstruction due to local tumors or soft tissue swelling due to physical urticaria or angioedema; (v) acute nasal congestion in the atopic patient with allergic rhinitis; (vi) dermatologic disorders associated with other OSA risk factors (eg, acanthosis nigricans and metabolic syndrome); and (vii) a high sympathetic tone (eg, in atopic dermatitis) and resultant sleep fragmentation contributing to upper airway instability during sleep...
May 2017: Clinics in Dermatology
https://www.readbyqxmd.com/read/28510278/tfg-met-fusion-in-an-infantile-spindle-cell-sarcoma-with-neural-features
#15
Uta Flucke, Max M van Noesel, Marc Wijnen, Lei Zhang, Chun-Liang Chen, Yun-Shao Sung, Cristina R Antonescu
An increasing number of congenital and infantile sarcomas displaying a primitive, monomorphic spindle cell phenotype have been characterized to harbor recurrent gene fusions, including infantile fibrosarcoma and congenital spindle cell rhabdomyosarcoma. Here we report an unusual spindle cell sarcoma presenting as a large and infiltrative pelvic soft tissue mass in a 4-month-old girl, which revealed a novel TFG-MET gene fusion by whole transcriptome RNA sequencing. The tumor resembled the morphology of an infantile fibrosarcoma with both fascicular and patternless growth, however, it expressed strong S100 protein immunoreactivity, while lacking SOX10 staining and retaining H3K27me3 expression...
May 16, 2017: Genes, Chromosomes & Cancer
https://www.readbyqxmd.com/read/28509377/h3-1-k36m-mutation-in-a-congenital-onset-soft-tissue-neoplasm
#16
Kristin D Kernohan, David Grynspan, Raveena Ramphal, Eric Bareke, You Chang Wang, Elizabeth Nizalik, Jiannis Ragoussis, Nada Jabado, Kym M Boycott, Jacek Majewski, Sarah L Sawyer
We describe a patient who presented with a congenital soft tissue lesion initially diagnosed as infantile fibromatosis at 15 days of age. Unusually, the mass demonstrated malignant progression leading to death at 20 months of age. Biological progression to malignancy is not known to occur in fibromatosis, and fibrosarcoma is not known to progress from a benign lesion. Whole-exome sequencing of the tumor identified a driver mutation in histone H3.1 at lysine (K)36. Our findings support the link between oncohistones and infantile soft tissue tumors and provide additional evidence for the oncogenic effects of p...
May 16, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28507959/intramuscular-arteriovenous-hemangioma-of-thigh-a-case-report-and-review-of-literature
#17
Sanjeev Patnaik, Praveen Kumar, Biswaranjan Nayak, Nachiketa Mohapatra
INTRODUCTION: Skeletal muscle hemangiomas are uncommon soft tissue tumors; more than 90% are misdiagnosed initially. They present as chronic pain and swelling in a muscle with or without a history of trauma. Magnetic resonance imaging is the investigation of choice. Many treatment modalities for the symptomatic hemangiomas are available of which surgical excision is the most preferred. CASE REPORT: We present an unusual case of pain, swelling, and restriction of movements in the right knee following an episode of trauma in an 8-year-old boy diagnosed to have intramuscular arteriovenous hemangioma in the vastusmedialis and vastusintermedius for which he was treated by surgical excision and followed for 2 years and found to have no recurrence...
November 2016: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28507850/distally-based-sural-artery-peroneus-flap-dbspf-for-foot-and-ankle-reconstruction
#18
Ahmed Ali Ebrahiem, Raj Kumar Manas, Gustavo Vinagre
BACKGROUND: Reconstruction of soft-tissue defects in lower third of leg, ankle, and foot has been a challenge and reconstructive surgeons have been trying to innovate different flaps. To solve this issue, we propose a distally based sural artery peroneus flap (DBSPF) in which we include superficial portion of the peroneus brevis muscle and its blood supply with the peroneal artery distally. The aim of this study was to evaluate the functional outcome and its usefulness over conventional distal sural artery flap or other local options available...
April 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28507643/imaging-of-complications-after-limb-prostheses-implantation-in-children-with-bone-tumors
#19
Beata Iwanowska, Hanna Brągoszewska, Jarosław Mądzik, Sylwia Szkudlińska-Pawlak, Izabela Kopyś-Wiszniewska, Małgorzata Jastrzębska, Barbara Kowalska, Maria Uliasz, Monika Bekiesińska-Figatowska
BACKGROUND: Tumors of the developmental age are an important problem in clinical practice. Primary bone tumors constitute 1-1.5% of all tumors, and 7% of all tumors diagnosed in the developmental age. The aim of the study was to assess the capabilities of imaging methods in diagnosing complications of limb endoprostheses in children with osteoarticular tumors. MATERIAL/METHODS: We included 155 patients with limb endoprostheses, aged 7-26 years. There were 113 patients with knee prostheses, 1 patient with bilateral knee prostheses, 16 patients with shoulder prostheses, 14 patients with hip prostheses, 11 patients with hip and knee prostheses, and 1 patient with a femoral prosthesis...
2017: Polish Journal of Radiology
https://www.readbyqxmd.com/read/28506772/treatment-of-epithelioid-angiosarcoma-with-topical-ala-pdt-in-the-course-of-surgery
#20
Yang Gao, Wen-Sheng Wang, Hai-Lin Wang, Jia Liu, Yuan-Gang Lu
BACKGROUND: Epithelioid angiosarcoma is a kind of high grade malignancy sarcoma of soft tissue, which is hard to diagnose and completely exsect without causing functional and cosmetic problems. Moreover, the high rate of recurrence is hard to handle. Photodynamic therapy is a novel treatment protocol which can selectively destroy tumor cell with good functional and cosmetic outcomes. METHODS: This is a case about a 81 years old patient with Epithelioid angiosarcoma in the right medial angle of eye, which received surgery and photodynamic therapy...
May 12, 2017: Photodiagnosis and Photodynamic Therapy
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