Abstract
Appropriate data from the California Tumor Registry and related sources were examined for testicular cancer (ICD No. 178). While there has been a 67-percent increase in the prevalance of testicular cancer in California between 1945–1954 and 1955–1969, there has been no significant increase in its incidence in Alameda County, Calif. (1960–1968). Characteristics of testicular cancer in California include a bimodal age distribution, a median age at diagnosis of 34 years (1955–1969) and an incidence rate of 2.6/100,000. There was no significant difference in the urban versus rural distribution of testicular cancer or seminomas as separate groupings (p > 0.10). The 5-year relative survival rate has increased from 54 (1942–1954) to 67% (1955–1969) due to a greater localization of the disease at the time of first diagnosis and the increased combination use of surgery and irradiation.

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