Acute Cholecystitis Diagnosis (Tokyo Guidelines TG18)
Acute cholecystitis diagnosis (Tokyo Guidelines TG18/TG13, Yokoe 2018): classifies a presentation as definite, suspected, or not-met from three categories.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- A Murphy's sign
- Yes
- B fever
- Yes
Result: Suspected acute cholecystitis (TG18): one item in category A (Murphy sign) plus one in B (fever); a definite diagnosis adds a characteristic imaging finding.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Suspected
- One item in A (local signs) plus one item in B (systemic signs).
- Definite
- One item in A plus one in B plus C (imaging findings characteristic of acute cholecystitis).
- Not met
- Fewer items than the suspected threshold; the presentation does not meet TG18 criteria.
What you enter
- A Murphy's sign
- A right-upper-quadrant mass, pain, or tenderness
- B fever
- B elevated CRP
- B elevated WBC count
- C imaging findings characteristic of acute cholecystitis
How this is calculated
Miura F, Okamoto K, Takada T, et al. Tokyo Guidelines 2018: initial management of acute biliary infection and flowchart for acute cholangitis. J Hepatobiliary Pancreat Sci. 2018;25(1):31-40 (Table 2, cited from Yokoe et al.). Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.