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    Age-specific Incidence Rate in Men and Women, Osaka, Japan, 1988-1992.
    Source: Cancer Incidence in Five Continents Vol 7, IARC, 1997
Annual rate per 100,000

Source: Cancer Incidence in Five Continents Vol 7, IARC, 1997

Male-to-female ratio is almost unity until early 40s. Male predominance is noted in later ages.

This pattern of age-dependent sex ratio is almost universally documented.