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Jean Carlos Barbosa Ferreira, Angélica Ferreira Oton-Leite, Rafaela Guidi, Elismauro Francisco Mendonça
BACKGROUND: Granular cell tumor is a rare benign tumor that can present a pseudoepitheliomatous hyperplasia of the covering epithelium. This lesion is not encapsulated and can be characterized by a pseudo invasive growth pattern, represented by the tumoral cells that infiltrate between adjacent connective tissue elements. Diagnostic difficulties may arise because histopathological features of the pronounced pseudoepitheliomatous hyperplasia can be confused with a well-differentiated oral squamous cell carcinoma...
January 3, 2017: BMC Research Notes
Yara Backes, Leon Mg Moons, Marco R Novelli, Jeroen D van Bergeijk, John N Groen, Tom Cj Seerden, Matthijs P Schwartz, Wouter H de Vos Tot Nederveen Cappel, Bernhard Wm Spanier, Joost Mj Geesing, Koen Kessels, Marjon Kerkhof, Peter D Siersema, G Johan A Offerhaus, Anya N Milne, Miangela M Lacle
T1 colorectal cancer can be mimicked by pseudo-invasion in pedunculated polyps. British guidelines are currently one of the few which recommend diagnostic confirmation of T1 colorectal cancer by a second pathologist. The aim of this study was to provide insights into the accuracy of histological diagnosis of pedunculated T1 colorectal cancer in daily clinical practice. A sample of 128 cases diagnosed as pedunculated T1 colorectal cancer between 2000 and 2014 from 10 Dutch hospitals was selected for histological review...
January 2017: Modern Pathology: An Official Journal of the United States and Canadian Academy of Pathology, Inc
Maurice B Loughrey, Neil A Shepherd
Colorectal cancer screening is widely promulgated in many parts of the world and population screening is occurring in many countries, especially in western Europe. Although, intuitively, it might be thought that the pathology resulting from screening should be straightforward, being mainly that of polyp diagnosis and the biopsy diagnosis and staging of established adenocarcinoma, in fact experience has shown that there are several areas of considerable difficulty and controversy. In the UK somewhat different programmes, all based on faecal occult blood (FOB) screening, have been developed and each has generated similar pathological conundra...
January 2015: Histopathology
S B Dewdney, Z Jiao, A A Roma, F Gao, B J Rimel, P H Thaker, M A Powell, L S Massad, D G Mutch, I Zighelboim
INTRODUCTION: Recent reports have suggested that uterine manipulators can induce lymphovascular space involvement (LVSI) by endometrial cancer in laparoscopic hysterectomy specimens. The prognostic significance of this phenomenon known as "vascular pseudo invasion" remains elusive. MATERIALS AND METHODS: The authors conducted a retrospective, single institution study of patients who underwent initial surgery for grade 1 and grade 2 endometrioid endometrial cancers with LVSI...
2014: European Journal of Gynaecological Oncology
Ruthy Shaco-Levy, Sarah M Bean, Robin T Vollmer, John A Papalas, Rex C Bentley, Maria Angelica Selim, Stanley J Robboy
The Duke experience with 56 vulvar Paget disease patients was analyzed emphasizing pathologic features and controversial issues. Nearly all patients were Caucasian, and their mean age was 69 years. The average length of follow-up was 5.6 years. For each case, the following histologic features were evaluated and their association with disease course was examined: pseudo-invasion, adnexal involvement, signet-ring cells, cytologic atypia, glands formation, epidermal acantholysis, parakeratosis, hyperkeratosis, and chronic inflammation...
January 2010: International Journal of Gynecological Pathology
Ivan Chebib, Elana Opher, Mark E Richardson
The diagnosis of follicular carcinoma of the thyroid requires the identification of capsular and/or vascular invasion, with the exception of distant metastases. However, several artifacts may mimic both vascular and capsular invasion. This article presents two cases of pseudo invasion in encapsulated follicular neoplasms. Their differentiation from true vascular and capsular invasion is discussed and the criteria for true invasion are reviewed.
December 2009: International Journal of Surgical Pathology
Sanjay Logani, Anne V Herdman, James V Little, Karen A Moller
Total laparoscopic hysterectomy has been shown to be an equally effective and safe technique when compared with conventional abdominal surgery for endometrial carcinoma. The procedure, as performed at our institution, involves the use of a uterine balloon manipulator (RUMI manipulator and Koh Colpotomizer system) for optimal surgical control. The fallopian tubes are cauterized to prevent transtubal spread of the tumor. The balloon manipulator thus creates a positive closed pressure system within the uterine cavity...
April 2008: American Journal of Surgical Pathology
Harry S Cooper
Endoscopically removed malignant colorectal polyps are early stage cancers for which treatment depends on histopathologic findings. For accurate pathologic evaluation, the polyps should be received in 1 piece because margins cannot be accurately assessed in fragmented polyps. Polyps with grade I or II cancer, no lymphovascular invasion, and a negative resection margin can be successfully treated with endoscopic polypectomy, whereas those with grade III cancer, lymphovascular invasion, or a positive or close margin require definitive surgical resection after endoscopic polypectomy...
October 2007: Journal of the National Comprehensive Cancer Network: JNCCN
Pierre-Emmanuel Rautou, Pascal Hammel, Anne Couvelard, Pierre Rivet, Alain Aubert, Philippe Lévy, Philippe Ruszniewski
A 29-year-old man with a previously known Peutz-Jeghers syndrome (PJS) was admitted for epigastric pain, emesis and weight loss due to both intestinal intussusception causing bowel obstruction and obstructive pancreatitis. The patient had cholestasis with an enlarged common bile duct on imaging. Because duodenal and/or pancreatic cancer was suspected due to weight loss, the pancreatic and bile duct obstruction, and the increased risk of small intestine and pancreatic adenocarcinoma in patients with PSJ, a pancreatoduodenectomy was performed...
May 2007: Gastroentérologie Clinique et Biologique
Armando Gamboa-Dominguez, Tom Ubbelohde, Milena Saqui-Salces, Luis Romano-Mazzoti, Minerva Cervantes, Claudia Domínguez-Fonseca, Maria de la Luz Estreber, Guillermo M Ruíz-Palacios
Our aim was to determine if salt and stress enhance Helicobacter pylori (Hp) lesions in Meriones unguiculatus. Two hundred seventy-eight pathogen-free gerbils were allocated to seven groups: Hp-Sydney strain (45), 8% higher-salt diet (38), stress (60% space reduction/water immersion; 36), Hp + salt (33), Hp + stress (34), N-methyl-N-nitro-N-nitrosoguanidine (34), and sham (58). Gerbils were sacrificed at 1 week (67), 12 weeks (73), 52 weeks (65), and 68 weeks (73). Sydney, Padova, and Lauren classifications were blindly used...
June 2007: Digestive Diseases and Sciences
Y Mikami, S Hata, J Melamed, K Fujiwara, T Manabe
AIMS: Lobular endocervical glandular hyperplasia of the uterine cervix is a rare pseudoneoplastic lesion of the uterine cervix, described recently. Our aim was to characterize the clinicopathological and immunohistochemical features of lobular endocervical glandular hyperplasia, to elucidate its pyloric gland phenotype, and to distinguish it from adenoma malignum of the uterine cervix. METHODS AND RESULTS: Nine cases of lobular endocervical glandular hyperplasia were studied histologically and immunohistochemically...
October 2001: Histopathology
A M Westerman, M L van Velthuysen, D J Bac, W R Schouten, J H Wilson
Peutz-Jeghers syndrome is a malignancy-associated polyposis syndrome. We describe a histopathologic phenomenon easily encountered when examining the nature of Peutz-Jeghers polyps but that is underreported in the literature. This phenomenon of "pseudo-invasion" may mimic invasive carcinoma due to epithelial displacement and erroneously give the impression, both macroscopically and microscopically, that a malignancy is involved. This potential pitfall is illustrated by the case of a patient with Peutz-Jeghers syndrome who was thought to harbor a metastasizing adenocarcinoma in his small bowel with peritoneal metastasis as a perioperative finding...
July 1997: Journal of Clinical Gastroenterology
L Fucci, A M Valentini, M L Caruso
We verified the binding of peanut agglutinin (PNA) in 28 pedunculated adenomas (10 with pseudo and 18 with true invasion, respectively) of the large bowel. The distribution of glycoproteins was assessed in the normal mucosa of the stalk, in the surface dysplastic mucosa and in the mucosa of the pseudo-invasion or cancerization areas. The aims of the study were to verify: the PNA role in the differential diagnosis between pseudo and true invasion; the changes in PNA binding during transformation of mucosa from the normal to dysplastic and neoplastic status; the PNA ability as a predictive marker in the neoplastic transformation...
1993: European Journal of Histochemistry: EJH
T Shirai, M Takahashi, S Fukushima, N Ito
Iodoacetamide (IAA), an ulcerogenic compound, was continuously given to male Wistar rats for up to 74 weeks. No carcinomas developed but marked glandular hyperplasias were frequently observed accompanied by chronic ulcer or erosion in the fundic region. They showed pseudo-invasive growth into the submucosa, the granulomatous tissue and even into the muscle layer, but no cellular and nuclear atypia was observed in their glands. Characteristically the mucosal damage caused by chronic IAA treatment was restricted to the fundic mucosa along the limiting ridge...
January 1985: Acta Pathologica Japonica
C C Conte, J P Welch, R Tennant, F Forouhar, J Lundy, G P Bloom
The medical records of 87 patients with 89 malignant colorectal polyps removed endoscopically between 1971 and 1983 were reviewed retrospectively. Fifty-five polyps contained carcinoma-in-situ. Four polyps had "pseudo-invasion" by displaced mucosal glands. Thirty polyps contained invasive carcinoma. No patients with carcinoma-in-situ or "pseudo-invasion" had either local residual disease or metastatic disease at the time of colectomy or which was detected during subsequent follow-up. Four patients (14%) with invasive cancer would have been inadequately treated by polypectomy alone, since one had residual disease at the polypectomy site, one had nodal metastases, one had liver metastases at the time of colectomy, and one subsequently developed liver metastases...
October 1987: Journal of Surgical Oncology
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