M-ANNHEIMMultidimensional Severity Score
Clinical Phase / Phenotype
Staging Engine
Select clinical findings to categorize the multidimensional M-ANNHEIM severity index.
Guidelines & Evidence
Verified
Last Review: 2026-07-17
When to Use
When to Use
Standardized staging and severity assessment of chronic pancreatitis (CP)
To guide the multi-disciplinary management of pain, malabsorption, and diabetes
Categorizing etiology using the M-ANNHEIM mnemonic framework
Systemic Approach
Unlike older binary classifications, M-ANNHEIM is a three-part system: Etiology (M-ANNHEIM), Clinical Stage (0–IV), and Severity (A–E).
How it Works
Etiology (M-ANNHEIM Mnemonic)
M: Multiple (multiple factors present)
A: Alcohol consumption (major driver)
N: Nicotine (smoking is an independent relative risk)
N: Nutritional (hyperlipidaemia, high protein)
H: Hereditary (PRSS1, SPINK1, CFTR mutations)
E: Efferent duct factors (obstruction, pancreas divisum)
I: Immunological (Autoimmune Pancreatitis)
M: Miscellaneous (metabolic, hypercalcaemia)
Stage and Severity
| Minor Severity (A/B) | Intermittent pain; no organ failure |
| Moderate Severity (C) | Constant pain; diabetes or steatorrhea present |
| Advanced Severity (D/E) | Ductal strictures; chronic complications (pseudocyst/thrombosis) |
Clinical Pearls
Why Smoking (Nicotine) is Listed
M-ANNHEIM was the first major classification to promote smoking ("N") as a primary independent risk factor for chronic pancreatitis. Smoking acts synergistically with alcohol to accelerate fibrosis and increases the risk of pancreatic adenocarcinoma by 2.5x.
The 'E' Factor (Obstruction)
If Pancreas Divisum or an obstructing stone is the primary "E" factor, patients may benefit from specialized ERCP or surgical decompression (e.g., Puestow procedure).
Clinical Pearls
Autoimmune pancreatitis (I) can often be managed with steroids alone, avoiding surgery
Diabetes in CP is "Type 3c" and is notoriously difficult to manage due to the loss of both insulin AND glucagon cells
Exocrine pancreatic insufficiency (EPI) typically requires a 90% loss of glandular function before steatorrhea becomes clinically apparent
Next Steps
Management Priority
01
Severity A-B: Lifestyle modification (Smoking/Alcohol cessation); Pain control.
02
Severity C: PERT (Enzyme) replacement and insulin optimization.
03
Severity D-E: Referral for EUS or surgical ductal decompression.
The Evidence
The Foundational System
The M-ANNHEIM classification of chronic pancreatitis: introduction of a unifying classification system based on a review of previous classifications of the disease.
Schneider A et al. • Pancreas. 2007;35(2):101-19. The comprehensive primary reference.
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Origins & History
The Mannheim Consortium
Developed at the University of Heidelberg, Mannheim, Germany. It was designed to replace the Marseille (1963) and Rome (1988) classifications, which focused too heavily on pathology and ignored the clinical multi-factorial reality of the disease.
Last Comprehensive Review: 2026-07-17