Hazard-rate analysis in state I malignant melanoma.

Area of Science:

• Oncology
• Biostatistics
• Dermatology

Background:

• Prognosis assessment in malignant diseases is crucial.
• Hazard-rate analysis offers a method to evaluate patient survival over time.
• Cutaneous malignant melanoma (MM) requires accurate prognostic tools.

Purpose of the Study:

• To apply hazard-rate analysis to clinical stage I cutaneous malignant melanoma (MM).
• To determine the time-dependent risk of death from metastatic MM.
• To investigate the influence of primary tumor thickness on MM prognosis.

Main Methods:

• Hazard-rate analysis was conducted on 719 patients with clinical stage I cutaneous MM.
• Patient data included follow-up duration and outcomes.
• Stratification by primary MM thickness was performed.

Main Results:

• The peak hazard rate for death from metastatic MM occurred at the 48th month of follow-up.
• The hazard rate declined significantly, approaching zero by 120 months.
• Thicker primary MM lesions showed an earlier peak hazard rate compared to thinner lesions.

Conclusions:

• After 120 months of survival, the risk of death from cutaneous MM is minimal.
• While rare late deaths occur, the prognosis improves significantly over time.
• Lifetime follow-up is recommended for all patients due to the possibility of late-occurring MM deaths.