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Clinical calculator summary

Weiss Score (Adrenal)

The Weiss System is the standard histological scoring system for adrenocortical tumors.

Evidence-based context for fast calculator use

Purpose:
Weiss Score evaluates nine histologic criteria to differentiate benign adrenocortical adenoma from malignant adrenocortical carcinoma.
Population:
patients with the adrenal or neuroendocrine tumor pathology described by the scoring system
Factors:
High Nuclear Grade?, Mitotic Rate > 5 per 50 HPF?, Atypical Mitoses?, Clear Cells ≤ 25% of tumor?, Diffuse Architecture?, Necrosis?, Venous Invasion?, Sinusoidal Invasion?
Reference:
Weiss LM. Comparative histologic study of 43 metastasizing and 50 nonmetastasizing adrenocortical tumors. Am J Surg Pathol. 1984;8(3):163-169.
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Weiss Score (Adrenal)

Clinical Context & Background

The Weiss System is the standard histological scoring system for adrenocortical tumors. It evaluates 9 microscopic features. A score of 3 or higher indicates malignancy (Adrenocortical Carcinoma).
Primary Source EvidenceWeiss LM. Comparative histologic study of 43 metastasizing and 50 nonmetastasizing adrenocortical tumors. Am J Surg Pathol. 1984;8(3):163-169.
Formula Logic
Sum of 9 histologic criteria (1 point each).

Reference Data

Total ScoreDiagnosis
0 - 2Adrenocortical Adenoma (Benign)
≥ 3Adrenocortical Carcinoma (Malignant)

Clinical Workflow

Use, Interpret, And Continue The Patient Pathway

Expand for workflow guidance, limitations, examples, and related next steps.

When To Use

  • Use Weiss Score (Adrenal) when weiss Score evaluates nine histologic criteria to differentiate benign adrenocortical adenoma from malignant adrenocortical carcinoma.
  • Confirm that the patient, diagnosis, disease phase, and available inputs match the cited model before calculation.

How To Interpret

  • Interpret the displayed result using the calculator-specific formula and reference table, spanning 0 - 2 through ≥ 3.
  • A boundary result should prompt input verification and clinical review rather than false precision.

What To Do Next

  • Confirm specimen adequacy, expert endocrine pathology, hormonal function, imaging, stage, and molecular context.
  • Document the inputs, result, timing, and clinical context so the assessment can be reproduced.

Limitations

  • Pathology criteria can be subtype-specific and should not be extrapolated between adrenal and neuroendocrine neoplasms.
  • The result supports clinician judgment and does not independently determine treatment.

Validated Population

patients with the adrenal or neuroendocrine tumor pathology described by the scoring system

How to apply this result

For a representative case, verify High Nuclear Grade?, Mitotic Rate > 5 per 50 HPF?, Atypical Mitoses?, calculate the result, and confirm that its classification matches the highlighted reference band before continuing the disease-specific pathway.

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Frequently Asked Questions

When should Weiss Score (Adrenal) be used?

Use it for patients with the adrenal or neuroendocrine tumor pathology described by the scoring system when all required inputs and the intended clinical setting are confirmed.

Can Weiss Score (Adrenal) determine treatment by itself?

No. Interpret the result with the cited evidence, complete clinical assessment, current guidelines, and patient-specific goals.

Evidence-based oncology decision support. Verify with clinical guidelines.