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Juvenile polyp

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https://www.readbyqxmd.com/read/29019747/masses-of-the-nose-nasal-cavity-and-nasopharynx-in-children
#1
Diana P Rodriguez, Emily S Orscheln, Bernadette L Koch
A wide range of masses develop in the nose, nasal cavity, and nasopharynx in children. These lesions may arise from the nasal ala or other structures of the nose, including the mucosa covering any surface of the nasal cavity, the cartilaginous or osseous portion of the nasal septum, the nasal turbinates, and the nasal bones. Lesions may also arise from the nasopharynx or adjacent structures and involve the nose by way of direct extension. The causes of nasal masses in children include congenital and developmental disorders such as congenital nasolacrimal duct mucocele, dermoid cyst, cephalocele, and nasal neuroglial heterotopia; inflammatory and infectious processes such as mucocele, polyp, and pyogenic granuloma; benign neoplasms such as infantile hemangioma and juvenile nasopharyngeal angiofibroma; malignant lesions such as rhabdomyosarcoma and nasopharyngeal carcinoma; and masses related to prior trauma such as septal hematoma...
October 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/28901964/the-role-of-the-surgical-pathologist-in-the-diagnosis-of-gastrointestinal-polyposis-syndromes
#2
Christophe Rosty
Polyps of the gastrointestinal tract are very common lesions and most frequently sporadic in nature. Some polyp subtypes are associated with rare hereditary polyposis syndromes, including juvenile polyposis syndrome, Peutz-Jeghers syndrome, and Cowden syndrome. However, many sporadic benign lesions of the gastrointestinal tract can mimic some of these syndromic hamartomatous polyps. The role of the surgical pathologist is to raise the possibility of a hereditary condition in case of suggestive polyp histology and to look for clinical information to support the suspected diagnosis...
September 8, 2017: Advances in Anatomic Pathology
https://www.readbyqxmd.com/read/28888696/characterization-of-nvlwamide-like-neurons-reveals-stereotypy-in-nematostella-nerve-net-development
#3
Jamie A Havrilak, Dylan Faltine-Gonzalez, Yiling Wen, Daniella Fodera, Ayanna C Simpson, Craig R Magie, Michael J Layden
The organization of cnidarian nerve nets is traditionally described as diffuse with randomly arranged neurites that show minimal reproducibility between animals. However, most observations of nerve nets are conducted using cross-reactive antibodies that broadly label neurons, which potentially masks stereotyped patterns produced by individual neuronal subtypes. Additionally, many cnidarians species have overt structures such as a nerve ring, suggesting higher levels of organization and stereotypy exist, but mechanisms that generated that stereotypy are unknown...
November 15, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28842049/management-of-small-bowel-polyps-a-literature-review
#4
REVIEW
Rabia A de Latour, Saikiran M Kilaru, Seth A Gross
Despite the small bowel comprising 90% of the mucosal surface area of the gastrointestinal tract, it is a rare site for neoplasia and only accounts for a little over 3% of the tumors that arise in the digestive tract. Benign small bowel lesions include lipomas, lymphangiomas, leiomyomas, neurofibromas, nodular lymphoid hyperplasia and adenomas, many of which are precursors to malignant lesions. Several polyposis syndromes are associated with small bowel polyps as well, including familial adenomatous polyposis syndrome, lynch syndrome, Peutz-Jeghers syndrome, Cowden syndrome and juvenile polyposis syndrome...
August 2017: Best Practice & Research. Clinical Gastroenterology
https://www.readbyqxmd.com/read/28842047/evaluation-and-management-of-gastric-epithelial-polyps
#5
REVIEW
R Castro, P Pimentel-Nunes, M Dinis-Ribeiro
Gastric polyps include a wide spectrum of lesions with different histology and neoplastic potential. They are found in up to 6% of upper gastrointestinal endoscopy and are usually asymptomatic and incidentally diagnosed, being in the vast majority epithelial gastric polyps. Hyperplastic, fundic gland and adenomas are the most common types of gastric polyps and, although each type may have typical endoscopic appearances, they all must be sampled at the initial endoscopy for histological assessment. Also, the normal appearing gastric mucosa should be sampled to stage atrophic changes, rule out endoscopically non-visible dysplasia and to diagnose Helicobacter pylori...
August 2017: Best Practice & Research. Clinical Gastroenterology
https://www.readbyqxmd.com/read/28600700/co-occurrence-of-lynch-syndrome-and-juvenile-polyposis-syndrome-confirmed-by-multigene-panel-testing
#6
Rachel Silva-Smith, Daniel A Sussman
Through germline multigene panel testing, we discovered the co-occurrence of Lynch syndrome due to a PMS2 mutation and juvenile polyposis syndrome due to a BMPR1A mutation in a young man with synchronous bladder and colorectal cancers and a family history of colorectal polyps. To our knowledge, this is the first report of an individual having these two hereditary colorectal cancer syndromes. This discovery highlights the benefit of multigene testing over traditional stepwise genetic testing, particularly when a clinical presentation suggests more than one underlying genetic cause...
June 9, 2017: Familial Cancer
https://www.readbyqxmd.com/read/28550623/malignant-tumors-associated-with-juvenile-polyposis-syndrome-in-japan
#7
REVIEW
Hideyuki Ishida, Keiichiro Ishibashi, Takeo Iwama
PURPOSE: The risk of malignant tumors developing in association with juvenile polyposis syndrome (JPS) was evaluated to explore the optimal treatment for this rare disease. METHODS: We reviewed the data on JPS cases reported in Japan between January, 1971 and March, 2016. RESULTS: A total of 171 cases were evaluable. Of these 171 patients, 83 (48.5%) were female and the median age at diagnosis was 28 years (range 1-80 years). The polyps were located in the stomach alone (n = 62; 36...
May 26, 2017: Surgery Today
https://www.readbyqxmd.com/read/28489743/narrow-band-imaging-endoscopy-is-advantageous-over-conventional-white-light-endoscopy-for-the-diagnosis-and-treatment-of-children-with-peutz-jeghers-syndrome
#8
Weiwei Cheng, Haifeng Liu, Zhujun Gu, Zhihong Hu, Ling Wang, Xing Wang
Using narrow-band imaging (NBI), the micro morphology of polyp surfaces was visualized at high resolution when the contrast between the lesions and the surrounding tissue areas was intensified. The objective of the study was to compare NBI and conventional white light endoscopy (C-WLI) for diagnostic efficacy and treatment of children with Peutz-Jeghers syndrome (PJS), a rare autosomal dominant-genetic disease.We retrospectively analyzed the clinical data of 18 patients diagnosed with PJS and 72 diagnosed with juvenile polyps during the same time period...
May 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28474162/-hereditary-colorectal-cancer-an-update-on-genetics-and-entities-in-terms-of-differential-diagnosis
#9
REVIEW
T T Rau, H Dawson, A Hartmann, J Rüschoff
The pathologist can contribute to recognizing hereditary causes of colorectal cancer via morphology. By identifying so-called index patients, it is possible to take preventive measures in affected families. The precise definition of the clinical presentation and the histopathological phenotype help to narrow the spectrum of expected genetic alterations. Novelties within Lynch syndrome include the recognition of EPCAM as a fifth gene locus, as well as the newly defined Lynch-like syndrome with evidence of somatic mismatch repair (MMR) mutations...
May 2017: Der Pathologe
https://www.readbyqxmd.com/read/28428902/nonfamilial-juvenile-polyposis-syndrome-with-exon-5-novel-mutation-in-smad-4-gene
#10
Amna Ahmed, Badr Alsaleem
Juvenile polyposis syndrome (JPS) is a rare autosomal dominant hereditary disorder, characterized by multiple juvenile polyps in the gastrointestinal tract and an increased risk of colorectal cancer. JPS is most frequently caused by mutations in the SMAD4 or BMPR1A genes. Herein, we report a child with juvenile polyposis syndrome (JPS) with a novel mutation in the SMAD4 gene. An 8-year-old boy presented with recurrent rectal bleeding and was found to have multiple polyps in the entire colon. The histology of the resected polyps was consistent with juvenile polyps...
2017: Case Reports in Pediatrics
https://www.readbyqxmd.com/read/28340255/massive-gastric-juvenile-polyposis-a-clinicopathologic-study-using-smad4-immunohistochemistry
#11
Margaret E Lawless, Daniel L Toweill, Kim D Jewell, Dhanpat Jain, Laura Lamps, Alyssa M Krasinskas, Paul E Swanson, Melissa P Upton, Matthew M Yeh
Objectives: Juvenile polyps involving the stomach are uncommon. Massive gastric juvenile polyposis is even rarer. Methods: We describe the clinicopathologic features of nine cases of massive gastric juvenile polyposis. Results: All patients had anemia; four had hypoalbuminemia. The polyps were composed predominantly of dilated crypts lined by columnar epithelium and abundant edematous stroma with mixed inflammatory infiltrates. One patient had a poorly differentiated adenocarcinoma, arising in juvenile polyp-associated intraepithelial neoplasia...
April 1, 2017: American Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28247232/update-from-the-4th-edition-of-the-world-health-organization-classification-of-head-and-neck-tumours-nasopharynx
#12
Edward B Stelow, Bruce M Wenig
The current WHO classification system for tumors of the head and neck has made few changes from the previous edition with regards to tumors of the nasopharynx. The classification system is discussed here with particular attention to nasopharyngeal carcinoma, nasopharyngeal papillary adenocarcinoma, salivary gland anlage tumor, hairy polyp, juvenile angiofibroma, and other tumors.
March 2017: Head and Neck Pathology
https://www.readbyqxmd.com/read/28208929/colocolic-intussusception-in-a-child-with-pathologic-lead-point-along-with-intestinal-malrotation-a-rare-case-report-and-brief-review
#13
Prasanta Kumar Tripathy, Pradeep Kumar Jena
Intestinal obstruction in children is frequently caused by intussusception and intestinal malrotation and when these two conditions co-exist, it is called Waugh's syndrome. Intussusception cases in children are mostly ileocolic, whereas, the colocolic variety is a rare entity and very few cases have been reported in literature. In all the reported cases of Waugh's syndrome, the intussusceptions were ileocolic type except one case, where colocolic type was mentioned with lymphangoima as Pathological Lead Point (PLP)...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28168076/coexistence-of-juvenile-like-polyp-with-neurofibroma-at-the-gastroesophageal-junction-in-an-adult-with-neurofibromatosis-type-i
#14
Namrah Aijaz, Peter Draganov, Atif Iqbal, Xiuli Liu
A 23-year-old Caucasian male with Neurofibromatosis Type I (NF-I) was found to have a submucosal nodule at the gastroesophageal junction (GEJ) and underwent endoscopic submucosal dissection. Histological examination revealed two different lesions within the nodule. The dominant lesion was inflammatory/hyperplastic (juvenile-like) polyp with obliterative vasculopathy while the smaller lesion was a neurofibroma. Gastric/GEJ lesions in NF-I are very rare with only seven cases reported in the literature. Three cases of juvenile-like gastric polyps (located in the antrum, greater curvature, and fundus) have been reported in adult NF-I patients...
2017: Case Reports in Pathology
https://www.readbyqxmd.com/read/28141681/osseous-metaplasia-in-a-juvenile-rectal-polyp
#15
Harry Russell Haynes, Anthony E Wiskin, Dharam Basude, Elise Gradhand
No abstract text is available yet for this article.
January 28, 2017: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/27991685/massive-gastric-juvenile-type-polyposis-a-clinicopathological-analysis-of-22-cases
#16
Raul S Gonzalez, Volkan Adsay, Rondell P Graham, Stuti G Shroff, Michael M Feely, Michael G Drage, David N Lewin, Eric A Swanson, Rhonda K Yantiss, Pelin Bağci, Alyssa M Krasinskas
AIMS: Massive gastric polyposis is a rare entity that is often associated with juvenile polyposis syndrome (JPS). The aim of this study was to evaluate the clinicopathological features of 22 patients with abundant gastric juvenile-type or hyperplastic-like polyps. METHODS AND RESULTS: The study included 12 males and 10 females with a median age of 48 years (range: 13-79 years). Fourteen (64%) patients carried a diagnosis of JPS, and three had prior gastrointestinal adenocarcinomas...
May 2017: Histopathology
https://www.readbyqxmd.com/read/27845203/complete-mitochondrial-genome-and-evolutionary-analysis-of-turritopsis-dohrnii-the-immortal-jellyfish-with-a-reversible-life-cycle
#17
A A Lisenkova, A P Grigorenko, T V Tyazhelova, T V Andreeva, F E Gusev, A D Manakhov, A Yu Goltsov, S Piraino, M P Miglietta, E I Rogaev
Turritopsis dohrnii (Cnidaria, Hydrozoa, Hydroidolina, Anthoathecata) is the only known metazoan that is capable of reversing its life cycle via morph rejuvenation from the adult medusa stage to the juvenile polyp stage. Here, we present a complete mitochondrial (mt) genome sequence of T. dohrnii, which harbors genes for 13 proteins, two transfer RNAs, and two ribosomal RNAs. The T. dohrnii mt genome is characterized by typical features of species in the Hydroidolina subclass, such as a high A+T content (71...
February 2017: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/27833772/adenomatous-polyps-in-adolescent-girl-and-boy-a-report-of-two-cases
#18
Laleh Vahedi Larijani, Maryam Ghasemi, Hassan Karami
A polyp is defined as a mass of the mucosal surface that protrudes into the lumen of the gastrointestinal tract. Neoplastic epithelial polyps are classified histologically as either benign adenoma or malignant carcinoma. The colonic polyps that most commonly present in children occur sporadically and individually and are of the juvenile type; they are most frequently associated with painless rectal hemorrhage (which is the most common symptom). Adenomatous polyps are similar to other nontumoral polyps, and it is very rare for children to have symptoms other than rectal bleeding...
2016: Case Reports in Pathology
https://www.readbyqxmd.com/read/27661969/gastrointestinal-polyposis-in-cowden-syndrome
#19
Ruthy Shaco-Levy, Kory W Jasperson, Katie Martin, N J Samadder, Randall W Burt, Jian Ying, Mary P Bronner
GOALS: To further characterize the gastrointestinal manifestations of Cowden syndrome in clinically well-annotated patients to improve the diagnosis of this syndrome. BACKGROUND: The gastrointestinal manifestations of Cowden Syndrome, an important heritable and multiorgan cancer syndrome, are not well defined. Proper diagnosis is essential for effective cancer surveillance and prevention in these patients. STUDY: Cowden patients with gastrointestinal polyps were selected for medical record and pathologic slide review...
August 2017: Journal of Clinical Gastroenterology
https://www.readbyqxmd.com/read/27644675/accuracy-of-fdg-pet-ct-for-detection-of-incidental-pre-malignant-and-malignant-colonic-lesions-correlation-with-colonoscopic-and-histopathologic-findings
#20
Anchisa Kunawudhi, Alexandra K Wong, Tarik K Alkasab, Umar Mahmood
PURPOSE: We evaluated all PET/CTs acquired for patients without a primary diagnosis of colorectal cancer, and compared results for those who had subsequent colonoscopy within 6 months, to assess the accuracy of FDG PET/CT for detection of incidental pre-malignant polyps and malignant colon cancers. MATERIALS AND METHODS: Medical records of 9,545 patients who underwent F-18 FDG PET/CT studies over 3.5 years were retrospectively reviewed. Due to pre-existing diagnosis of colorectal cancer, 818 patients were excluded...
2016: Asian Pacific Journal of Cancer Prevention: APJCP
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