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Fig. 1

Human gallbladder stones. Pure cholesterol stones with spherical shape and morular surface (a), oval shape and smooth surface (b), multiple stones (c). The cut surface is shown with a brownish centre and radial disposition of cholesterol monohydrate crystals (d). Pure pigment stones are shown as debris (e). Mixed stones are shown as multifaceted concernments (f). Note that the black pigment surface and the inner centre are made of a small amount of solid cholesterol crystals (arrow) Black horizontal line=1 cm.
Human gallbladder stones. Pure cholesterol stones with spherical shape and morular surface (a), oval shape and smooth surface (b), multiple stones (c). The cut surface is shown with a brownish centre and radial disposition of cholesterol monohydrate crystals (d). Pure pigment stones are shown as debris (e). Mixed stones are shown as multifaceted concernments (f). Note that the black pigment surface and the inner centre are made of a small amount of solid cholesterol crystals (arrow) Black horizontal line=1 cm.

Fig. 2

Algorithm of the management of acute cholecystitis
Algorithm of the management of acute cholecystitis

Fig. 3

Definition of severity of acute cholangitis.
Definition of severity of acute cholangitis.

Fig. 4

Factors predisposing to acute acalculous cholecystitis.
Factors predisposing to acute acalculous cholecystitis.

Complications of gallstones

Complications
Acute cholecystitis*
Acute biliary pancreatitis*
Acute cholangitis*
Acute acalculous cholecystitis*
Biliary enteric fistula and gallstone ileus*
Choledocholithiasis
Cholestatic jaundice*
Cholesterolosis and gallbladder polyps
Chronic cholecystitis
Gallbladder carcinoma and porcelain gallbladder
Recurrent pyogenic cholangitis*

Conditions predisposing to increased risk of acute cholecystitis

Acute non-biliary diseasesImmunocompromised illness
Acute renal failureInfections (hepatitis B virus, ascariasis in developing countries)
Age > 60 yearsMajor surgery
Biliary sludgeFemale gender
Cardiovascular disease (history of ischemic stroke, cerebral hemorrhage)Multiple trauma
Diabetes mellitusSepsis
GallstonesSevere burns
Hormonal replacement therapySystemic vasculitis
HypertriglyceridemiaTotal parenteral nutrition, long term fasting

Imaging techniques for acute cholecystitis

TechniqueMajor findingsNotes
Abdominal ultrasonographyEnlarged gallbladder sizeFirst choice
Gallbladder wall thickening (>4mm) Incarcerated gallstone(s) Intraluminal debris echoes Pericholecystic fluid collection or abscess Positive “sonographic” Murphy sign Sonolucent “double wall sign”Moderate sensitivity (88%90%) and specificity (80%) [63, 122-124]
Hepatobiliary scintigraphy (technetium iminodiaceticCompound given intravenously and excreted by the liver Test is positive if the gallbladder is not visualized (i.e., cysticHighest sensitivity and specificity (≈90-95%) [123]
acid or hydroxyiminodiacetic acid)duct obstruction due to edema by acute cholecystitis) [63]Not easily available
Computed Tomography (CT)Gallbladder wall edemaHigh sensitivity 94%
Pericholecystic fluid Other complications [125]Low specificity 59% [123, 126]
Magnetic ResonanceGallstones are likely passed in the common bile duct [127]Moderate accuracy [123]
Cholangio-PancreatographyNot easily available
(MRCP)Under evaluation
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Langue:
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