Cutaneous lymphoma in Israel, 1985-1993: a population-based incidence study

Area of Science:

• Dermatology
• Oncology
• Epidemiology

Background:

• Cutaneous lymphomas (CL), including mycosis fungoides (MF) and non-MF, are a group of cancers affecting the skin.
• Accurate incidence data is crucial for understanding disease burden and trends.

Purpose of the Study:

• To determine the age-adjusted incidence rates of CL in Israel between 1985 and 1993.
• To compare incidence rates between different demographic groups, including sex, ethnicity, and lymphoma subtype.

Main Methods:

• Utilized data from the Israeli Cancer Registry, supplemented by a field survey covering approximately 80% of lymphoma cases.
• Calculated corrected incidence rates for CL, MF, and non-MF, adjusting for underreporting.
• Age-adjusted incidence rates per 100,000 were calculated for Jewish men and women.

Main Results:

• Corrected incidence rates for CL were 37% higher overall, with MF rates 49% higher and non-MF rates 24% higher than initially reported.
• Age-adjusted incidence rates were 1.18/100,000 for Jewish men and 0.63/100,000 for Jewish women.
• MF incidence was higher than non-MF in both sexes. CL rates were significantly lower in non-Jews, with no significant differences among Jewish ethnic subgroups.

Conclusions:

• The study highlights higher-than-expected incidence rates for cutaneous lymphomas in Israel, particularly for mycosis fungoides.
• Observed high CL rates may align with the sunlight exposure hypothesis, potentially through mechanisms distinct from those in cutaneous malignant melanoma.
• Incidence variations across subpopulations warrant further investigation into potential etiological factors.