About This Tool

The CTCL Risk Assessment Tool was developed to help dermatologists identify patients who may be at higher risk for Cutaneous T-Cell Lymphoma (CTCL). Early diagnosis of CTCL can be challenging due to its resemblance to common skin conditions like eczema and psoriasis, often leading to delays in diagnosis and treatment.

This tool uses a set of clinical indicators that have been associated with CTCL to generate a risk assessment. It is designed to be used by general dermatologists as an aid in clinical decision-making, particularly when considering whether to perform a biopsy or refer to a specialist.

The risk calculator is a heuristic using selected clinical features. It is intended to supplement, not replace, clinical judgment and does not provide a definitive diagnosis.

The app sums eight fixed feature weights and applies a threshold of 0.3. These are app conventions, not a calibrated probability or a society diagnostic algorithm. A primary publication tying this exact implementation to validation data has not been verified. Accuracy, sensitivity and specificity for this calculator are therefore not reported.

It's important to note that this tool provides a risk assessment, not a diagnosis. A high-risk result should prompt consideration of appropriate next steps, which may include biopsy, referral to a specialist, or additional testing.

Users should be aware of the following limitations:

• This tool is designed for use by healthcare professionals and is not intended for self-diagnosis by patients
• The risk assessment is based on clinical features and does not incorporate histopathological, immunophenotypic, or molecular data
• A low-risk result does not rule out CTCL, particularly in cases with strong clinical suspicion
• Clinical validation of this implementation has not been established
• Clinical judgment should always take precedence over the risk assessment provided by this tool