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==Overview==
==Overview==
'''Occult blood''' is blood in the feces in amounts that cannot be seen by the eye however it can be detected through tests.
'''Occult blood''' is blood in the feces in amounts that cannot be seen by the eye however it can be detected through tests.


==Causes==
==Causes<ref>Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:77 ISBN 1591032016</ref><ref>Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:68 ISBN 140510368X</ref>==
===Causes in Alphabetical Order<ref>Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:77 ISBN 1591032016</ref><ref>Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:68 ISBN 140510368X</ref>===
<div style="-webkit-user-select: none;">
*Angiodysplasia of the colon
 
===Life Threatening Causes===
*[[Carcinoma ]]
*[[Erosive gastritis]]
*[[Gastric carcinoma]]
*[[Gastrointestinal trauma]]
*[[Gastrointestinal tumor]]
*[[Infections]]
*[[Neoplasia]]
*[[Portal hypertension]]
*[[Tuberculous enterocolitis]]
 
===Common Causes===
*[[Anal fissures ]]
*[[Angiodysplasia of the colon]]
*[[Angioectasia]]
*[[Aortoenteric fistula]]
*[[Cameron lesions]]
*[[Celiac sprue]]
*[[Colon polyps]]
*[[Crohn's disease]]
*[[Dieulafoy lesions]]
*[[Diverticula]]
*[[Duodenal ulcer]]
*[[Erosive gastritis]]
*[[Esophageal varices]]
*[[Gastric antral vascular ectasia]]
*[[Gastric carcinoma]]
*[[Gastric ulcer]]
*[[Gastrointestinal trauma]]
*[[Gastrointestinal tumor]]
*[[Hemorrhoids ]]
*[[Hiatal hernia]]
*[[Inflammatory bowel disease]]
*[[Intestinal polyposis]]
*[[Meckel’s diverticulum]]
*[[Oropharyngeal]]
*[[Plummer-vinson syndrome]]
*[[Reflux esophagitis]]
*[[Small bowel varices]]
*[[Ulcerative colitis]]
*[[Vascular ectasia]]
*[[Whipple disease]]
 
===Causes by Organ System===
{|style="width:80%; height:100px" border="1"
|style="height:100px"; style="width:25%" border="1" bgcolor="LightSteelBlue" |'''Cardiovascular'''
|style="height:100px"; style="width:75%" border="1" bgcolor="Beige" | [[Angiodysplasia of the colon]],  [[Arteriovenous malformation]],  [[Gastric antral vascular ectasia]],  [[Malignant atrophic papulosis]],  [[Portal hypertension]],  [[Vascular ectasia]]
|-
|bgcolor="LightSteelBlue"| '''Chemical/Poisoning'''
|bgcolor="Beige"| No underlying causes
|-
|-bgcolor="LightSteelBlue"
| '''Dental'''
|bgcolor="Beige"| No underlying causes
|-
|-bgcolor="LightSteelBlue"
| '''Dermatologic'''
|bgcolor="Beige"| [[Hereditary hemorrhagic telangiectasia ]]
|-
|-bgcolor="LightSteelBlue"
| '''Drug Side Effect'''
|bgcolor="Beige"| [[Nsaids]]
|-
|-bgcolor="LightSteelBlue"
| '''Ear Nose Throat'''
|bgcolor="Beige"| No underlying causes
|-
|-bgcolor="LightSteelBlue"
| '''Endocrine'''
|bgcolor="Beige"| [[Amyloidosis]]
|-
|-bgcolor="LightSteelBlue"
| '''Environmental'''
|bgcolor="Beige"| No underlying causes
|-
|-bgcolor="LightSteelBlue"
| '''Gastroenterologic'''
|bgcolor="Beige"| [[Anal fissures ]],  [[Angiodysplasia of the colon]],  [[Angioectasia]],  [[Aortoenteric fistula]],  [[Cameron lesions]],  [[Celiac sprue]],  [[Colon polyps]],  [[Crohn's disease]],  [[Dieulafoy lesions]],  [[Diverticula]],  [[Duodenal ulcer]],  [[Erosive gastritis]],  [[Esophageal varices]],  [[Gastric antral vascular ectasia]],  [[Gastric carcinoma]],  [[Gastric ulcer]],  [[Gastrointestinal trauma]],  [[Gastrointestinal tumor]],  [[Hemorrhoids ]],  [[Hiatal hernia]],  [[Inflammatory bowel disease]],  [[Intestinal polyposis]],  [[Meckel’s diverticulum]],  [[Oropharyngeal]],  [[Plummer-vinson syndrome]],  [[Reflux esophagitis]],  [[Small bowel varices]],  [[Ulcerative colitis]],  [[Vascular ectasia]],  [[Whipple disease]]
|-
|-bgcolor="LightSteelBlue"
| '''Genetic'''
|bgcolor="Beige"| [[Ehlers-danlos syndrome]],  [[Meckel’s diverticulum]],  [[Pseudoxanthoma elasticum]]
|-
|-bgcolor="LightSteelBlue"
| '''Hematologic'''
|bgcolor="Beige"| [[Epistaxis]],  [[Hemangiomas]],  [[Hematobilia]],  [[Hemoptysis]],  [[Hereditary hemorrhagic telangiectasia ]],  [[Plummer-vinson syndrome]]
|-
|-bgcolor="LightSteelBlue"
| '''Iatrogenic'''
|bgcolor="Beige"| [[Gm-csf therapy]]
|-
|-bgcolor="LightSteelBlue"
| '''Infectious Disease'''
|bgcolor="Beige"| [[Amebiasis]],  [[Ascariasis]],  [[Hemosuccus entericus]],  [[Hookworm]],  [[Kaposi sarcoma ]],  [[Strongyloidiasis]],  [[Tuberculous enterocolitis]]
|-
|-bgcolor="LightSteelBlue"
| '''Musculoskeletal/Orthopedic'''
|bgcolor="Beige"| No underlying causes
|-
|-bgcolor="LightSteelBlue"
| '''Neurologic'''
|bgcolor="Beige"| No underlying causes
|-
|-bgcolor="LightSteelBlue"
| '''Nutritional/Metabolic'''
|bgcolor="Beige"| No underlying causes
|-
|-bgcolor="LightSteelBlue"
| '''Obstetric/Gynecologic'''
|bgcolor="Beige"| No underlying causes
|-
|-bgcolor="LightSteelBlue"
| '''Oncologic'''
|bgcolor="Beige"| [[Blue rubber bleb nevus syndrome]],  [[Carcinoma ]],  [[Colon polyps]],  [[Gastric carcinoma]],  [[Gastrointestinal tumor]],  [[Hemangiomas]],  [[Inherited polyposis syndromes ]],  [[Kaposi sarcoma ]],  [[Mass lesions]],  [[Neoplasia]]
|-
|-bgcolor="LightSteelBlue"
| '''Ophthalmologic'''
|bgcolor="Beige"| No underlying causes
|-
|-bgcolor="LightSteelBlue"
| '''Overdose/Toxicity'''
|bgcolor="Beige"| No underlying causes
|-
|-bgcolor="LightSteelBlue"
| '''Psychiatric'''
|bgcolor="Beige"| [[Factitious]]
|-
|-bgcolor="LightSteelBlue"
| '''Pulmonary'''
|bgcolor="Beige"| [[Hemoptysis]],  [[Loeffler's syndrome]],  [[Tuberculous enterocolitis]]
|-
|-bgcolor="LightSteelBlue"
| '''Renal/Electrolyte'''
|bgcolor="Beige"| No underlying causes
|-
|-bgcolor="LightSteelBlue"
| '''Rheumatology/Immunology/Allergy'''
|bgcolor="Beige"| [[Amyloidosis]],  [[Celiac sprue]],  [[Crohn's disease]]
|-
|-bgcolor="LightSteelBlue"
| '''Sexual'''
|bgcolor="Beige"| No underlying causes
|-
|-bgcolor="LightSteelBlue"
| '''Trauma'''
|bgcolor="Beige"| [[Anal fissures ]],  [[Cameron lesions]],  [[Dieulafoy lesions]],  [[Fissures]],  [[Gastrointestinal trauma]],  [[Hemorrhoids ]],  [[Hiatal hernia]],  [[Prolonged running]],  [[Ulcers]]
|-
|-bgcolor="LightSteelBlue"
| '''Urologic'''
|bgcolor="Beige"| No underlying causes
|-
|-bgcolor="LightSteelBlue"
| '''Miscellaneous'''
|bgcolor="Beige"| [[Idiopathic cecal ulcer]]
|-
|}
 
===Causes in Alphabetical Order===
{{columns-list|3|
*[[Amebiasis]]
*[[Amyloidosis]]
*[[Anal fissures ]]
*[[Angiodysplasia of the colon]]
*[[Angioectasia]]
*[[Aortoenteric fistula]]
*[[Arteriovenous malformation]]
*[[Arteriovenous malformation]]
*[[Ascariasis]]
*[[Blue rubber bleb nevus syndrome]]
*[[Cameron lesions]]
*[[Carcinoma ]]
*[[Celiac sprue]]
*[[Colon polyps]]
*[[Crohn's disease]]
*[[Dieulafoy lesions]]
*[[Diverticula]]
*[[Diverticula]]
*[[Duodenal ulcer]]
*[[Ehlers-danlos syndrome]]
*[[Epistaxis]]
*[[Erosive gastritis]]
*[[Esophageal varices]]
*[[Esophageal varices]]
*[[Fissure]]s
*[[Factitious]]
*Gastrointestinal trauma
*[[Fissures]]
*Gastrointestinal tumor
*[[Gastric antral vascular ectasia]]
*[[Gastric carcinoma]]
*[[Gastric carcinoma]]
*GM-CSF Therapy
*[[Gastric ulcer]]
*[[Hemorrhoid]]s
*[[Gastrointestinal trauma]]
*[[Gastrointestinal tumor]]
*[[Gm-csf therapy]]
*[[Hemangiomas]]
*[[Hematobilia]]
*[[Hemoptysis]]
*[[Hemorrhoids ]]
*[[Hemosuccus entericus]]
*[[Hereditary hemorrhagic telangiectasia ]]
*[[Hiatal hernia]]
*[[Hiatal hernia]]
*[[Infection]]s
*[[Hookworm]]
*[[Idiopathic cecal ulcer]]
*[[Infections]]
*[[Inflammation]]
*[[Inflammation]]
*Intestinal polyposis
*[[Inflammatory bowel disease]]
*Loeffler's syndrome
*[[Inherited polyposis syndromes ]]
*[[NSAID]]s
*[[Intestinal polyposis]]
*[[Kaposi sarcoma ]]
*[[Loeffler's syndrome]]
*[[Malignant atrophic papulosis]]
*[[Mass lesions]]
*[[Meckel’s diverticulum]]
*[[Neoplasia]]
*[[Nsaids]]
*[[Oropharyngeal]]
*[[Plummer-vinson syndrome]]
*[[Polyposis syndromes]]
*[[Portal hypertension]]
*[[Portal hypertension]]
*[[Prolonged running]]
*[[Pseudoxanthoma elasticum]]
*[[Reflux esophagitis]]
*[[Small bowel varices]]
*[[Strongyloidiasis]]
*[[Tuberculous enterocolitis]]
*[[Ulcerative colitis]]
*[[Ulcers]]
*[[Vascular ectasia]]
*[[Whipple disease]]
}}
</div>
==Related Chapters==
==Related Chapters==
[[Gastrointestinal bleeding]]
[[Gastrointestinal bleeding]]
==References==
==References==
{{reflist|2}}
{{reflist|2}}


[[Category:Stool tests]]
[[Category:Emergency medicine]]
[[Category:Emergency medicine]]
[[Category:Surgery]]
[[Category:Surgery]]
[[Category:Blood tests]]
[[Category:Gastroenterology]]
[[Category:Gastroenterology]]


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Revision as of 16:12, 31 January 2017

Template:Search infobox Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Luke Rusowicz-Orazem, B.S.

Overview

Occult blood is blood in the feces in amounts that cannot be seen by the eye however it can be detected through tests.

Causes[1][2]

Life Threatening Causes

Common Causes

Causes by Organ System

Cardiovascular Angiodysplasia of the colon, Arteriovenous malformation, Gastric antral vascular ectasia, Malignant atrophic papulosis, Portal hypertension, Vascular ectasia
Chemical/Poisoning No underlying causes
Dental No underlying causes
Dermatologic Hereditary hemorrhagic telangiectasia
Drug Side Effect Nsaids
Ear Nose Throat No underlying causes
Endocrine Amyloidosis
Environmental No underlying causes
Gastroenterologic Anal fissures , Angiodysplasia of the colon, Angioectasia, Aortoenteric fistula, Cameron lesions, Celiac sprue, Colon polyps, Crohn's disease, Dieulafoy lesions, Diverticula, Duodenal ulcer, Erosive gastritis, Esophageal varices, Gastric antral vascular ectasia, Gastric carcinoma, Gastric ulcer, Gastrointestinal trauma, Gastrointestinal tumor, Hemorrhoids , Hiatal hernia, Inflammatory bowel disease, Intestinal polyposis, Meckel’s diverticulum, Oropharyngeal, Plummer-vinson syndrome, Reflux esophagitis, Small bowel varices, Ulcerative colitis, Vascular ectasia, Whipple disease
Genetic Ehlers-danlos syndrome, Meckel’s diverticulum, Pseudoxanthoma elasticum
Hematologic Epistaxis, Hemangiomas, Hematobilia, Hemoptysis, Hereditary hemorrhagic telangiectasia , Plummer-vinson syndrome
Iatrogenic Gm-csf therapy
Infectious Disease Amebiasis, Ascariasis, Hemosuccus entericus, Hookworm, Kaposi sarcoma , Strongyloidiasis, Tuberculous enterocolitis
Musculoskeletal/Orthopedic No underlying causes
Neurologic No underlying causes
Nutritional/Metabolic No underlying causes
Obstetric/Gynecologic No underlying causes
Oncologic Blue rubber bleb nevus syndrome, Carcinoma , Colon polyps, Gastric carcinoma, Gastrointestinal tumor, Hemangiomas, Inherited polyposis syndromes , Kaposi sarcoma , Mass lesions, Neoplasia
Ophthalmologic No underlying causes
Overdose/Toxicity No underlying causes
Psychiatric Factitious
Pulmonary Hemoptysis, Loeffler's syndrome, Tuberculous enterocolitis
Renal/Electrolyte No underlying causes
Rheumatology/Immunology/Allergy Amyloidosis, Celiac sprue, Crohn's disease
Sexual No underlying causes
Trauma Anal fissures , Cameron lesions, Dieulafoy lesions, Fissures, Gastrointestinal trauma, Hemorrhoids , Hiatal hernia, Prolonged running, Ulcers
Urologic No underlying causes
Miscellaneous Idiopathic cecal ulcer

Causes in Alphabetical Order

The unnamed parameter 2= is no longer supported. Please see the documentation for {{columns-list}}.
3

Related Chapters

Gastrointestinal bleeding

References

  1. ↑ Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:77 ISBN 1591032016
  2. ↑ Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:68 ISBN 140510368X


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