Editor-In-Chief: C. Michael Gibson, M.S., M.D. [[Mailto:charlesmichaelgibson@gmail.com|[1]]]; Associate Editor(s
Overview
[Disease name] must be differentiated from other diseases that cause [clinical feature 1], [clinical feature 2], and [clinical feature 3], such as [differential dx1], [differential dx2], and [differential dx3].
OR
[Disease name] must be differentiated from [[differential dx1], [differential dx2], and [differential dx3].
Differentiating [Disease name] from other Diseases
Ascending cholangitis must be differentiated from other diseases that cause right upper quadrant pain and fever, such as
Differentiating ascending cholangitis from other diseases on the basis of abdominal pain, fever, and jaundice
Abbreviations:
RUQ= Right upper quadrant of the abdomen, LUQ= Left upper quadrant, LLQ= Left lower quadrant, RLQ= Right lower quadrant, LFT= Liver function test, SIRS= Systemic inflammatory response syndrome, ERCP= Endoscopic retrograde cholangiopancreatography, IV= Intravenous, N= Normal, AMA= Anti mitochondrial antibodies, LDH= Lactate dehydrogenase, GI= Gastrointestinal, CXR= Chest X ray, IgA= Immunoglobulin A, IgG= Immunoglobulin G, IgM= Immunoglobulin M, CT= Computed tomography, PMN= Polymorphonuclear cells, ESR= Erythrocyte sedimentation rate, CRP= C-reactive protein, TS= Transferrin saturation, SF= Serum Ferritin, SMA= Superior mesenteric artery, SMV= Superior mesenteric vein, ECG= Electrocardiogram
Classification of pain in the abdomen based on etiology
|
Disease
|
Clinical manifestations
|
Diagnosis
|
Comments
|
Symptoms
|
Signs
|
Abdominal Pain
|
Fever
|
Rigors and chills
|
Nausea or vomiting
|
Jaundice
|
Constipation
|
Diarrhea
|
Weight loss
|
GI bleeding
|
Hypo-
tension
|
Guarding
|
Rebound Tenderness
|
Bowel sounds
|
Lab Findings
|
Imaging
|
Abdominal causes
|
Inflammatory causes
|
Pancreato-biliary disorders
|
Acute suppurative cholangitis
|
RUQ
|
+
|
+
|
+
|
+
|
−
|
−
|
−
|
−
|
+
|
+
|
+
|
N
|
|
- Ultrasound shows biliary dilatation/stents/tumor
|
- Septic shock occurs with features of SIRS
|
Acute cholangitis
|
RUQ
|
+
|
−
|
−
|
+
|
−
|
−
|
−
|
−
|
−
|
−
|
−
|
N
|
|
- Ultrasound shows biliary dilatation/stents/tumor
|
- Biliary drainage (ERCP) + IV antibiotics
|
Acute cholecystitis
|
RUQ
|
+
|
−
|
+
|
+
|
−
|
−
|
−
|
−
|
−
|
−
|
−
|
Hypoactive
|
|
Ultrasound shows:
|
|
Acute pancreatitis
|
Epigastric
|
+
|
−
|
+
|
±
|
−
|
−
|
+
|
−
|
±
|
−
|
−
|
N
|
|
- Ultrasound shows evidence of inflammation
- CT scan shows severity of pancreatitis
|
|
Primary sclerosing cholangitis
|
RUQ
|
+
|
−
|
−
|
+
|
−
|
−
|
−
|
−
|
−
|
−
|
−
|
N
|
|
ERCP and MRCP shows
- Multiple segmental strictures
- Mural irregularities
- Biliary dilatation and diverticula
- Distortion of biliary tree
|
- The risk of cholangiocarcinoma in patients with primary sclerosing cholangitis is 400 times higher than the risk in the general population.
|
Cholelithiasis
|
RUQ/Epigastric
|
±
|
−
|
±
|
±
|
−
|
−
|
−
|
−
|
−
|
−
|
−
|
Normal to hyperactive for dislodged stone
|
|
|
|
Gastric causes
|
Gastrointestinal perforation
|
Diffuse
|
+
|
±
|
-
|
±
|
−
|
−
|
−
|
+
|
+
|
+
|
±
|
Hyperactive/hypoactive
|
|
|
|
Intestinal causes
|
Disease
|
Abdominal Pain
|
Fever
|
Rigors and chills
|
Nausea or vomiting
|
Jaundice
|
Constipation
|
Diarrhea
|
Weight loss
|
GI bleeding
|
Hypo-
tension
|
Guarding
|
Rebound Tenderness
|
Bowel sounds
|
Lab Findings
|
Imaging
|
Comments
|
Inflammatory bowel disease
|
Diffuse
|
±
|
−
|
−
|
±
|
−
|
+
|
+
|
+
|
−
|
−
|
−
|
Normal or hyperactive
|
|
|
Extra intestinal findings:
|
Whipple's disease
|
Diffuse
|
±
|
−
|
−
|
±
|
−
|
+
|
+
|
−
|
±
|
−
|
−
|
N
|
|
Endoscopy is used to confirm diagnosis.
Images used to find complications
|
Extra intestinal findings:
|
Hepatic causes
|
Viral hepatitis
|
RUQ
|
+
|
−
|
+
|
+
|
−
|
Positive in Hep A and E
|
+
|
−
|
Positive in fulminant hepatitis
|
Positive in acute
|
+
|
N
|
- Abnormal LFTs
- Viral serology
|
|
- Hep A and E have fecal-oral route of transmission
- Hep B and C transmits via blood transfusion and sexual contact.
|
Liver abscess
|
RUQ
|
+
|
+
|
+
|
+
|
−
|
±
|
+
|
−
|
+
|
+
|
±
|
Normal or hypoactive
|
|
|
|
Hepatocellular carcinoma/Metastasis
|
RUQ
|
+
|
−
|
−
|
+
|
−
|
−
|
+
|
−
|
−
|
−
|
−
|
- Normal
- Hyperactive if obstruction present
|
|
|
Other symptoms:
|
Budd-Chiari syndrome
|
RUQ
|
±
|
−
|
−
|
±
|
−
|
−
|
−
|
Positive in liver failure leading to varices
|
−
|
−
|
−
|
N
|
|
Findings on CT scan suggestive of Budd-Chiari syndrome include:
|
|
Ascitic fluid examination shows:
|
Peritoneal causes
|
Spontaneous bacterial peritonitis
|
Diffuse
|
+
|
−
|
−
|
Positive in cirrhotic patients
|
−
|
+
|
−
|
−
|
±
|
+
|
+
|
Hypoactive
|
- Ascitic fluid PMN>250 cells/mm³
- Culture: Positive for single organism
|
- Ultrasound for evaluation of liver cirrhosis
|
|
Hollow Viscous Obstruction
|
Biliary colic
|
RUQ
|
−
|
−
|
+
|
+
|
−
|
−
|
−
|
−
|
−
|
−
|
−
|
N
|
|
|
|
|
References