Primary references normal anatomy normal histology

Congenital anomalies: atresia/stenosis diverticula (not Meckel) duplication Ehlers-Danlos enterogenous cysts gastroschisis heterotopic gastric mucosa heterotopic pancreas Hirschsprung malrotation Meckel diverticulum meconium peritonitis omphalocele

Patterns of abnormal architecture: severe villous variable villus nonspecific variable villus

Malabsorption: general abetalipoproteinemia acrodermatitis enteropathica agammaglobulinemic sprue celiac sprue collagenous sprue dermatitis herpetiformis disaccharidase deficiency lymphangiectasia microvillus inclusion disease refractory sprue tropical sprue

Ulcers: duodenal peptic ulcer marginal ulcer small bowel ulcer

Inflammatory disorders: autoimmune enteropathy Behcet disease collagenous enterocolitis Crohn disease diaphragm disease duodenitis enterocolic (lymphocytic) phlebitis eosinophilic enteritis graft vs. host disease granulomatous IELNVA ileal pouch/pouchitis jejunitis lymphocytic enterocolitis malakoplakia necrotizing enterocolitis radiation enterocolitis sarcoidosis ulcerative colitis

Infectious disorders: diarrhea and dysentery bacteria AIDS Anisakis Campylobacter Capillariasis Clostridium CMV Cryptosporidium Cyclospora E coli Entamoeba histolytica Giardia Isospora Leishmaniasis Microsporidiosis Mycobacteria Rotavirus Salmonella Strongyloides tuberculosis Vibrio cholera Whipple disease Yersinia

Obstruction: general adhesions chronic idiopathic pseudo-obstruction hernias scleroderma volvulus

Benign tumors / tumor-like conditions: adenoma amyloidosis angiomyolipoma barium granuloma benign cystic mesothelioma blue rubber bleb nevus syndrome brown bowel syndrome Brunner gland hamartoma Brunner gland nodule clofazimine colchicine toxicity common variable immunodeficiency syndrome Cowden syndrome Cronkite-Canada syndrome decidual reaction endometriosis enteritis cystica profunda fibromatosis gangliocytic paraganglioma ganglioneuroma hemangioma hereditary telangiectasia hyperplastic Pacinian corpuscle idiopathic retractile mesenteritis idiopathic retroperitoneal fibrosis inflammatory fibroid polyp inflammatory myofibroblastic tumor inflammatory polyp intussusception ischemia kayexelate Klippel-Trenaunay-Weber syndrome leiomyoma lipoma lymphangioma lymphoid hyperplasia mastocytosis mesenteric chylous cyst myxoma neurofibroma neuromuscular and vascular hamartoma Peutz-Jeghers polyp pneumatosis cystoids intestinalis pseudomelanosis duodeni reactive nodular fibrous pseudotumor sclerosing peritonitis selective IgA deficiency tufting enteropathy Turner syndrome vascular disease

Carcinoma: general adenocarcinoma adenosquamous anaplastic neuroendocrine sarcomatoid signet ring small cell

Lymphoma: general Burkitt diffuse large B cell enteropathy associated T cell follicular histiocytic Hodgkin lymphoplasmacytic MALT mantle cell Mediterranean natural killer cell (NK) post-transplant primary effusion Waldenström macroglobulinemia

Other malignancies: carcinoid tumor carcinoid syndrome duodenal endocrine tumors enteroendocrine cell dysgenesis follicular dendritic cell sarcoma GANT GIST granulocytic sarcoma Kaposi sarcoma leiomyosarcoma metastases mullerian adenosarcoma Zollinger-Ellison syndrome

Miscellaneous: transplantation staging-carcinoma staging-GIST staging-neuroendocrine features to report

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Index (table of contents in alphabetical order)
A-B: abetalipoproteinemia acrodermatitis enteropathica adenocarcinoma adenoma adenosquamous carcinoma adhesions agammaglobulinemic sprue AIDS amyloidosis anaplastic carcinoma angiomyolipoma Anisakis atresia/stenosis autoimmune enteropathy bacteria barium granuloma Behcet disease benign cystic mesothelioma blue rubber bleb nevus syndrome brown bowel syndrome Brunner gland hamartoma Brunner gland nodule Burkitt lymphoma

C-D: Campylobacter Capillariasis carcinoid tumor carcinoid syndrome carcinoma-general celiac sprue chronic idiopathic pseudo-obstruction clofazimine Clostridium CMV colchicine toxicity collagenous enterocolitis collagenous sprue common variable immunodeficiency syndrome Cowden syndrome Crohn disease Cronkite-Canada syndrome Cryptosporidium Cyclospora decidual reaction dermatitis herpetiformis diaphragm disease diarrhea and dysentery diffuse large B cell lymphoma disaccharidase deficiency diverticula (not Meckel) duodenal endocrine tumors duodenal peptic ulcer duodenitis duplication

E-G: E coli Ehlers-Danlos endometriosis Entamoeba histolytica enteritis cystica profunda enterocolic (lymphocytic) phlebitis enteroendocrine cell dysgenesis enterogenous cysts enteropathy associated T cell lymphoma eosinophilic enteritis features to report fibromatosis follicular dendritic cell sarcoma follicular lymphoma gangliocytic paraganglioma ganglioneuroma GANT gastroschisis Giardia GIST graft vs. host disease granulocytic sarcoma granulomatous

H-K: hemangioma hereditary telangiectasia hernias heterotopic gastric mucosa heterotopic pancreas Hirschsprung histiocytic lymphoma Hodgkin lymphoma hyperplastic Pacinian corpuscle idiopathic retractile mesenteritis idiopathic retroperitoneal fibrosis IELNVA ileal pouch/pouchitis inflammatory fibroid polyp inflammatory myofibroblastic tumor inflammatory polyp intussusception ischemia Isospora jejunitis Kaposi sarcoma kayexelate Klippel-Trenaunay-Weber syndrome

L-M: leiomyoma leiomyosarcoma Leishmaniasis lipoma lymphangiectasia lymphangioma lymphocytic enterocolitis lymphoid hyperplasia lymphoma-general lymphoplasmacytic lymphoma malabsorption-general malakoplakia malrotation MALT lymphoma mantle cell lymphoma marginal ulcer mastocytosis Meckel diverticulum meconium peritonitis Mediterranean lymphoma mesenteric chylous cyst metastases Microsporidiosis microvillus inclusion disease mullerian adenosarcoma Mycobacteria myxoma

N-R: natural killer cell (NK) lymphoma necrotizing enterocolitis neuroendocrine carcinoma neurofibroma neuromuscular and vascular hamartoma nonspecific variable villus normal anatomy normal histology obstruction-general omphalocele Peutz-Jeghers polyp pneumatosis cystoids intestinalis post-transplant lymphoma primary effusion lymphoma primary references pseudomelanosis duodeni radiation enterocolitis reactive nodular fibrous pseudotumor refractory sprue Rotavirus

S-Z: Salmonella sarcoidosis sarcomatoid carcinoma scleroderma sclerosing peritonitis selective IgA deficiency severe villous abnormality signet ring carcinoma small bowel ulcer small cell carcinoma staging-carcinoma staging-GIST staging-neuroendocrine Strongyloides transplantation tropical sprue tuberculosis tufting enteropathy Turner syndrome ulcerative colitis variable villus abnormality vascular disease Vibrio cholera volvulus Waldenström macroglobulinemia Whipple disease Yersinia Zollinger-Ellison syndrome