Gut Club Index of cases Fall 2003 to present Fall 2003 Infantile - - PDF document

Gut Club Index of cases Fall 2003 to present Fall 2003 Infantile Hemangioendothelioma of liver Tumour of unknown origin Angiomyolipoma of liver Sclerosing HCC Ruptured visceral artery aneurysm Squamous papillomatosis of esophagus with well differentiated SCC Invasive fungal esophagitis with aorto-esophageal fistula Esophageal stricture with rupture Sudden death with alcoholic steatosis Breast Ca metastases to gut Squamous lesions Mitochondrial cytopathy Spring 2004 Dysplastic polyp with endometriosis Malignant PEComa of liver Schwannoma of gut Carcinoid associated inflammatory polyps Autoimmune Enteropathy Alagille Syndrome Anaplastic lymphoma of cecum Celiac disease with T Cell lymphoma Aggressive Mesenteric Fibrosis

Celiac disease with possible associated malignancies Fall 2004 Hp gastritis with Russell bodies Neurofibromatosis Stomach reaction to cyanoacrylate injected into varices Celiac disease with malignancies TB masquerading as Crohn's disease Squamous papillomatosis of esophagus with SCC (follow-up) Small cell NET in colonic adenoma Polypoid ganglioneuromatosis Cystic pancreatic lesions Bile duct strictures post liver transplant - possible recurrent PSC Mesenteric fibromatosis Myeloma in liver Rectal involvement by ovarian Ca Ischemic colitis in young patient Heterotopic gastric mucosa with myxoid stroma Spring 2005 Tumour capsule formation in liver tumours Cryptosporidiosis in small bowel transplant Esophageal Papillomatosis and SCC with drop metastases to stomach (follow-up presentation) Gastric iron injury Eosinophilic esophagitis Granular cell tumour

Whipple’s Disease Squamous metaplasia in colonic adenomas Adult autoimmune enteropathy Gastric Trichobezoar Leiomyoma with psammoma bodies Telangiectatic FNH liver Duodenal liposarcoma Celiac disease with small intestinal adenocarcinoma Lymphocytic colitis Massive GI bleed from Diverticulosis Granular cell tumour Autoimmune cholangitis vs PBC Gastric well differentiated Adenocarcinoma with possible neuroendocrine differentiation Fall 2005 SSA of colon with dysplasia and carcinoma Signet ring Ca of appendix Radiologic misdiagnosis of adenoma as invasive carcinoma Gastric fundic gland polyp with metastatic signet ring Ca Gut amoebiasis Synovial sarcoma of rectum Collagenous colitis with giant cell reaction Oncocytic carcinoma of pancreas Malakoplakia of the gut Colloid carcinoma of small bowel in pt with PJ polyp Hereditary gastric carcinoma

• H. heilmannii gastritis

NSAIDs and diaphragm disease Glandular GIST GIST with germline ckit mutation Ischemic colitis in a young woman Gastric Hamartoma Carcinoma arising in inverted adenoma of colon Pediatric hepatic angiosarcoma Cholangiocarcinoma with multiple Von Meyenburg complexes Spring 2006 Toxoplasma gastritis in aplastic anemia Multiple SSAs and associated carcinoma Fibrolamellar HCC Intestinal lipomatosis Mucin pools post adjuvant therapy in esophageal adenoca Choriocarcinoma metastatic to liver Fulminant UC UC with systemic mastocytosis Mesenteric osteogenic sarcoma Duodenal angiomyolipoma Fall 2006 Malignant colorectal polyps with significance of intramucosal lesions Esophageal leiomyoma Ileal and colonic lymphangiomas

Duodenal somatostatinoma Galactosemia effects on liver Lymph node metastases in T1 rectal carcinoma Intramucosal carcinoma in gastric hyperplastic polyp Possible Pseudoxanthoma elasticum Fallopian tube incorporated into ileal pouch Intra-abdominal cystic lymphangioma Gastric tubular carcinoma with parietal cell differentiation Appendiceal mucinous cystic tumour and carcinoid Spindle cell lesions Prognostic factors in GISTs Spring 2007 Gallbladder melanoma Inverted appendiceal stump causing cecal polyp Rectal lymphoma Prostate core bx with Schistosomiasis ova in rectal mucosa Intraductal oncocytic papillary tumour of pancreas with CIS Cystic fibrosis in gut Collagenous gastroenterocolitis Elastofibromatous changes in colon Benign Fibroelastic polyp Fall 2007 Anal canal condyloma Ciliated metaplasia Spindle cell lesion possibly gangliocytic paraganglioma of SI

Intravascular B cell lymphoma involving liver Mixed acinar endocrine tumour of pancreas Traditional serrated adenoma with HGD Endocrine neoplasm in gastric atrophy KS in GI tract Carcinoma in SRUS Systemic mastocytosis in ulcerative colitis Small intestinal lymphoma Pseudo-ground glass inclusions in liver Signet ring changes in pseudomembranous colitis Melanosis duodeni Endometriosis vs colon ca Spring 2008 AML of liver Ca in gastric hyperplastic polyp Iron-associated gastric ulcer UC, PSC and gallbladder dysplasia Small intestinal adenocarcinoma Serous microcystic adenoma of pancreas GIST with treatment effects Collagenous gastroduodenitis and colitis HCC metastatic to skul Adenoma in a Zenkers diverticulum Celiac and HNPCC-associated SI adenocarcinoma Reactive gastropathy with signet ring like degenerative changes

Appendix with combined goblet cell carcinoid tumour and mucinous cystic neoplasm PEComa Walthard-rest type inclusions in appendix Benign serosal glands in small intestine Fall 2008 Solid pseudopapillary neoplasm of pancreas Octreotide and gallbladder disease Terminal ileum hemosiderosis in hemochromatosis Granular degeneration of muscularis propria Hemangiopericytoma Ischemia and myointimal hyperplasia of mesenteric veins C difficile colitis Serrated adenomatous polyposis syndrome Visceral Leishmaniasis Collagenous colitis with IBD Pancreatic intraductal papillary oncocytic tumour Endoscopic mucosal resections esophagus and colon Granular cell tumours Spring 2009 SSA of appendix Eosinophilic esophagitis with stricture Liver adenomatosis CD vs NSAID in colon Liver metastatic glioblastoma

SMAD 4 associated colonic polyps Portal gastropathy Colon poorly differentiated intramucosal carcinoma Esophagus ulceration with bizarre stromal cells SMAD4 related Juvenile polyposis of colon Colonic adenomas with constitutional MMR deficiency Solitary necrotic nodule of liver Stomach with metastatic breast lobular carcinoma Fat atrophy in peritoneum with signet ring cells Juvenile polyposis of stomach UC pouchitis, pre-pouchitis and upper GI pathology UC pouchitis with IELs secondary to celiac disease Fall 2009 Gastric EMR with subtle intramucosal carcinoma Microvillous inclusion disease Adenocarcinoma arising in rectal duplication cyst Iron in mucosa Duodenal epithelioid angiosarcoma Gastroblastoma Cronkhite Canada Syndrome Ileal GIST with odd presentation Spring 2010 Venous thrombosis in CD Gastric foveolar dysplasia

Barium in appendix Collagenous enterocolitis Possible toothpaste crystals in mucosa Adult autoimmune enteropathy Hepatic angiosarcoma Prostate Ca metastases to liver Stomach atypical lymphoid infiltrate possible lymphoma in Hp negative patient Chronic granulomatous disease involving colon Colonic polyps with elastofibromatous changes Gangliocytic paraganglioma with metastases to node and liver Goblet cell carcinoid of appendix Cholecystitis with pinworm Gut involvement in drug related deaths Gastric schwannoma Gastric heterotopia in rectum Goblet cell carcinoid of appendix (another case) Plasmablastic lymphoma of stomach CMV appendicitis Spirochetosis of appendix CRC with schistosomiasis Refractory celiac disease Appendicitis with actinomycosis Fall 2010 Mucinous adenocarcinoma of gallbladder SI mast cell infiltrate in pt with leukemia

Gastric leiomyoma with hyaline globules Collagenous colitis with pyoderma gangrenosum Amoebic colitis Eosinophilic colitis with parasite Mastocytosis liver gut and bone marrow Gastric pylori gland adenoma with invasive carcinoma Hepatitis in HIV patient Colonic mycobacterial infection masquerading as CD Gastric hyperplastic polyposis Gastric atypical lymphoid infiltrate follow-up – now Syphilitic gastritis Gastric radiation effects SI lymphangioma Oxaliplatin hepatotoxicity Mucinous lesion of appendix Medullary carcinoma of colon Spring 2011 Duodenal gastrinoma with gastric carcinoids Pancreatic adenocarcinoma in Meckel’s diverticulum Esophageal hyperplastic polyp in EE SI involvement by extracavitary Primary Effusion Lymphoma Medullary carcinoma of stomach Atypical stromal cells in IBD CVID Autoimmune pancreatitis SI Ewing’s sarcoma

Colitis due to herbal medications Vanishing duct syndrome in Hodgkin’s disease Osseous metaplasia of gallbladder Fall 2011 Intramucosal adenocarcinoma of fundic gland type with chief cell predominance Liver with sickle cell disease, G6PD deficiency and hepatitis C Rectal Syphilis Constitutional Mismatch repair gene deficiency with childhood malignancies Colonic endometriosis mimicking Crohn’s disease Liver with Familial hemophagocytic lymphohistiocytosis Appendiceal ossification and Mesenteric Fibromatosis Sessile Serrated Polyposis Reticular Schwannoma Parietal cell Adenoma Cameron’s ulcers in hiatal hernia Autoimmune gastritis with neuroendocrine hyperplasia and pyloric gland adenoma Localized amyloid stricture of ileum Brunner’s gland adenomas Spring 2012 Duodenal gastrinoma with Pancreatic NET Calcification of Gallbladder Gastric intravascular lymphoma Sloughing esophagitis Basaloid SCC of esophagus

Collagenous gastroenteritides Helicobacter infection with minimal inflammation Pediatric CRC Melanoma metastatic to pancreas Langerhans cell histiocytosis Colonic clear cell adenocarcinoma Tailgut cyst with carcinoid tumour Gastric plexiform myxofibroma (2 presentations) Endometrial stromal sarcoma metastatic to the gut Crohn’s disease vs TB Schistosomiasis Gallbladder Phrygian cap Fall 2012 Steroid-induced hyperinfective Strongyloides Oxyntic gland polyp/adenoma Mucinous adenocarcinoma in duplicated appendix SCID with mesenteric mycobacterial infection SDH deficient GIST Mitochondrial Neurogastrointestinal Encephalomyopathy Appendiceal NET in LAMN Colonic Primary Effusion Lymphoma Squamous and Hepatoid Gastric Cancers Kayexalate colitis Risk assessment in GISTs Fibrolamellar Ca of liver

Gastrinoma possibly arising in peripancreatic node Juvenile Polyposis Kayexalate colitis Metastatic NET to liver with HepPar1 expression Liver adenoma - new classification Undifferentiated embryonal sarcoma of liver EMH in GI tract Fulminant HSV liver infection Pancreatic clear cell tumours T cell lymphoproliferative disorder of the gut. Spring 2013 Colonic and Liver Amoebiasis Eosinophilic esophagitis/gastroenteritis Cavitating Mesenteric Lymph Node Syndrome Liver Angiosarcoma Rectal Glomus tumour Biliary Intraepithelial Papillary Neoplasm and CCa Appendiceal changes of SLE AIH vs Salofalk-induced liver injury Temozolomide induced liver injury Pediatric A1-AT deficiency in liver AFP-producing non-hepatic tumour Goblet cell carcinoid metastasizing to sigmoid colon Eosinophilic enteritis

Lymphocytic colitis with subsequent collagenous colitis Fall 2013 GI special stains discussions Synovial Sarcoma of esophagus Kohlmeier-Degos disease Juvenile Polypsis DIOS in Cystic Fibrosis Alpha-1 Antitrypsin disease in liver Pancreatic intraductal papillary oncocytic neoplasm Cholangiocarcinoma in Hepatitis C patient Inflammatory fibroid polyps in pt with germline PDGFRA mutation GI Granulomas in Salmonella infection (and possibly CD) EATL in non-celiac patient Parietal cell adenoma Rectal Fibroadenoma ? Pancreatic Pseudoneoplastic islet cell proliferation Spring 2014 GI SINK biopsies Appendiceal diverticulum Drug induced liver injury Esophageal NET Difficult Serrated Colonic polyps Ring mitoses in Chemotherapy Radiation changes in colon

Hemophagocytic lymphohistiocytosis Esophageal squamous dysplasia Liver bx over time - switch from steatohepatitis to PBC? Tangier Disease Colonic polyp resection margin issues Gastric Ca post gastrectomy Colonic elastofibrosis Ciliated metaplasia in the esophagus Fall 2014 Medullary carcinoma of colon Duodenum heterotopic pancreas with NE collections - islets vs NET Gastric antral NET possibly syndromic Gastric hyperplastic polyp with NE hyperplasia, possibly hypergastrinemia Cord colitis syndrome Olmesartan enteropathy Hemolytic uremic syndrome in small bowel biopsies Pyloric gland adenoma Esophagitis in HIV with Cryptococcus CMV and herpes virus infection Retrorectal cystic hamartoma Gastric polyps likely juvenile polyposis Sporadic ICC cell hyperplasia Liver Obliterative portal venopathy Probable Mycophenylate mofetil MMF toxicity in child with STAT1 deficiency.

Spring 2015 Menetriere’s disease of stomach Abscess and perforation in collagenous colitis Indolent CD4+ T cell lymphoma of small bowel Duodenal germ cell tumour, non-seminomatous Collagenous gastritis Rectal Syphilis Gastric combined infection of Helicobacter and Enterococcus Gallbladder papillary hyperplasia Liver Budd Chiari Syndrome Colon colitis with odd epithelial cells ? Viral vs chemotherapy effects Esophagus Epidermoid metaplasia Colon MMF effects vs ischemia Colon metastatic angiosarcoma in tubular adenoma Meckel’s diverticulum with ectopic islets. Strongyloides in colon and duodenum Liver non-cirrhotic portal hypertension with Schistosomiasis Serrated epithelial changes and dysplasia in IBD Fall 2015 Colon dedifferentiated leiomyosarcoma Gastric glomus tumour Liver Pediatric Wilson’s disease Pyloric gland adenoma with MMR abnormalities Liver solitary necrotic nodule Gastric and small bowel worm infections

SSA in FAP patient Choriocarcinomatous dedifferentiation in Crohn’s associated dysplasia Duodenum celiac-like changes possibly immunodeficiency Colon Indolent EBV associated diffuse large B cell lymphoma of the elderly Liver serous neoplasm possibly met from pancreas Eosinophilic gastroenteritis Angiosarcoma of small bowel Fundic gland adenoma of stomach with HGD Lymphocytic enterocolitis Wagner Meissner corpuscles in esophagus and stomach Indolent CD4 positive T cell lymphoma of small bowel Enterobius associated appendicitis Breast lobular carcinoma metastases to the gut Ectopic sebaceous glands in esophagus Brunner’s Gland cyst of duodenum Spring 2016 Gastric schwannoma with signet ring cells and CD117 positivity Wagner Meissner corpuscles in stomach Collagenous colitis with IBD-like changes Appendiceal perforation secondary to massive amyloidosis Colitis secondary to immune modulating medications Malakoplakia of small bowel in UC patient Candida infection in the duodenum Misplaced normal mucosa in submucosa post polypectomy Small NET in antrum possibly ECL cell

Takayasu arteritis in the liver with necrotizing granulomas Epithelial cyst arising in intrapancreatic accessory spleen Villous adenoma arising in fistula tract Ectopic gastric mucosa in rectum EBV associated mucocutaneous ulcer Collagenous colitis associated with perforation Fall 2016 Cervix intestinal type minimum deviation adenocarcinoma Pancreatic germ cell tumour with teratoma neural and hepatoid features Colonic adenomas mixed with NET Probable Schistosoma proctitis Appendiceal NET and subepithelial NE cells Gangliocytic paraganglioma Intraductal spread of Esophageal squamous carcinoma Ischemic gut secondary to fungal infection Odd presentation of colitis possibly IBD Plasmacytic hyperplasia type PTLD in fut Possible Lupus arteritis in appendix Enteroblastic adenocarcinoma of small bowel Dysplasia in fundic gland polyps - a new syndrome Autoimmune enteropathy Gastric juvenile polyposis with ZES like change with neuroendocrine hyperplasia Mucinous adenocarcinoma arising in rectal developmental cyst EBV associated smooth muscle tumours

Spring 2017 Heterotopic pancreas in gallbladder wall Intravascular large B cell lymphoma Reflux Cholecystopathy Gastric hyperplastic polyp with Pyloric gland adenoma type dysplasia Collagenous colitis with ischemic change Hereditary diffuse gastric cancer Clear cell sarcoma- like tumour of the GI tract. Duodenal somatostatinoma and diffuse ganglioneuromatosis in probable NF1 patient Lipid rich/Clear cell variant of Neuroendocrine tumour Atrophic gastritis with Neuroendocrine hyperplasia with clear cell features. Rectal adenocarcinoma with prominent polypoid lymphoid hyperplasia in adjacent colon, favour immunodeficiency Langerhans cell histiocytosis Clear cell sarcoma like tumour of the GI tract Hamartomatous polyp of appendix Liver AIH PBC overlap syndrome Immune checkpoint blockade therapy effects on colorectal carcinoma Epidermoid metaplasia of esophagus Gastric heterotopia in rectum Colon Diverticular disease-associated adenocarcinoma Fall 2017 IBD vs drug reaction to IL17 blocker for psoriasis (Taltz) IgG4 disease of the esophagus Squamous carcinoma arising in retrorectal duplication cyst Adenovirus infection of the appendix

Cronkhite Canada syndrome GIST syndrome Gangliocytic paraganglioma of appendix Gallbladder hyperplastic ducts of Luschke mimicking adenocarcinoma Abernathy malformation of liver Adenocarcinoma arising in gastric duplication cyst Liver reporting of NAFLD and associated fibrosis Gastric crypt dysplasia Adult intussusception secondary to diffuse large cell lymphoma germinal centre type Well differentiated squamous carcinoma arising in perianal fistula near pouch in UC Perianal Basal cell carcinoma Liver - Hodgkin’s disease-associated vanishing bile duct disease Strongyloides of duodenum with possible CMV infection in colon Pancreatic neuroendocrine tumour grading