What are the limitations of the slim crab criteria?

While the slim crab criteria is highly validated, it should not replace clinical judgment. OpiCalc provides the latest evidence-based limitations for the slim crab criteria to ensure safe bedside use and optimal diagnostic accuracy.

How does the slim crab criteria compare to other Oncology scores?

The slim crab criteria is a gold-standard diagnostic tool. OpiCalc provides side-by-side clinical guidance to help clinicians choose the most specific evidence-based tool for their patient's presentation.

Is the slim crab criteria free to use?

Yes. OpiCalc provides the slim crab criteria completely ad-free and optimized for mobile bedside use, ensuring you can calculate medical risk swiftly and without distraction.

SLiM-CRAB Criteria

Myeloma & MPN

Treatment-triggering myeloma-defining event framework.

Hypercalcemia

Renal dysfunction attributable to myeloma

Anemia attributable to myeloma

One or more lytic bone lesions

Bone marrow plasma cells

Involved/uninvolved FLC ratio

MRI focal lesions

Waiting For Required Inputs

Complete the required fields to generate the oncology interpretation.

EVIDENCE SYNTHESIS

Clinical Reference Hub

Curated insights • How it Works • Practical Pearls • Evidence Base

CLINICAL INSIGHT

When to Use

Primary Use

Treatment-triggering myeloma-defining event framework.

CLINICAL INSIGHT

How it Works

Clinical Inputs

Hypercalcemia

Renal dysfunction attributable to myeloma

Anemia attributable to myeloma

One or more lytic bone lesions

Bone marrow plasma cells

Involved/uninvolved FLC ratio

MRI focal lesions

CLINICAL INSIGHT

Practical Pearls

Result Bands

CLINICAL INSIGHT

Next Steps

Suggested Next Steps

Interpret the result in the full disease-specific clinical context.
Correlate with pathology, imaging, performance status, and multidisciplinary guidance.

CLINICAL INSIGHT

Evidence Base

Treatment-triggering myeloma-defining event framework.

OpiCalc Medical Oncology ModuleMyeloma & MPN2026

CLINICAL INSIGHT

Background

Context

SLiM-CRAB Criteria is included in the oncology module as a structured decision-support tool for myeloma & mpn workflows.

No clinical reference data available.

SLiM-CRAB Criteria

Myeloma & MPN

Treatment-triggering myeloma-defining event framework.

Hypercalcemia

Renal dysfunction attributable to myeloma

Anemia attributable to myeloma

One or more lytic bone lesions

Bone marrow plasma cells

Involved/uninvolved FLC ratio

MRI focal lesions

Waiting For Required Inputs

Complete the required fields to generate the oncology interpretation.

EVIDENCE SYNTHESIS

Clinical Reference Hub

Curated insights • How it Works • Practical Pearls • Evidence Base

CLINICAL INSIGHT

When to Use

Primary Use

Treatment-triggering myeloma-defining event framework.

CLINICAL INSIGHT

How it Works

Clinical Inputs

Hypercalcemia

Renal dysfunction attributable to myeloma

Anemia attributable to myeloma

One or more lytic bone lesions

Bone marrow plasma cells

Involved/uninvolved FLC ratio

MRI focal lesions

CLINICAL INSIGHT

Practical Pearls

Result Bands

CLINICAL INSIGHT

Next Steps

Suggested Next Steps

Interpret the result in the full disease-specific clinical context.
Correlate with pathology, imaging, performance status, and multidisciplinary guidance.

CLINICAL INSIGHT

Evidence Base

Treatment-triggering myeloma-defining event framework.

OpiCalc Medical Oncology ModuleMyeloma & MPN2026

CLINICAL INSIGHT

Background

Context

SLiM-CRAB Criteria is included in the oncology module as a structured decision-support tool for myeloma & mpn workflows.

No clinical reference data available.