TY  - CHAP
M1  - Book, Section
TI  - Gastrointestinal Bleeding
A1  - Laine, Loren
A2  - Loscalzo, Joseph
A2  - Fauci, Anthony
A2  - Kasper, Dennis
A2  - Hauser, Stephen
A2  - Longo, Dan
A2  - Jameson, J. Larry
Y1  - 2022
N1  - 
T2  - Harrison's Principles of Internal Medicine, 21e
AB  - Gastrointestinal  bleeding  (GIB)  presents  as  either  overt  or  occult  bleeding.  Overt  GIB  is  manifested  by  hematemesis,  vomitus  of  red  blood  or  “coffee-grounds”  material;  melena,  black,  tarry  stool;  and/or  hematochezia,  passage  of  red  or  maroon  blood  from  the  rectum.  In  the  absence  of  overt  bleeding,  occult  GIB  may  present  with  symptoms  of  blood  loss  or  anemia  such  as  lightheadedness,  syncope,  angina,  or  dyspnea;  with  iron-deficiency  anemia;  or  a  positive  fecal  occult  blood  test  on  colorectal  cancer  screening.  GIB  is  also  categorized  by  the  site  of  bleeding  as  upper,  from  the  esophagus,  stomach,  or  duodenum;  lower,  from  the  colon;  small  intestinal;  or  obscure  GIB  if  the  source  is  unclear.  
SN  - 
PB  - McGraw-Hill Education
CY  - New York, NY
Y2  - 2024/04/19
UR  - accesspharmacy.mhmedical.com/content.aspx?aid=1197684573
ER  -