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Can J Urol. 2012 Apr;19(2):6178-82.

Penile Kaposis sarcoma in the state of California.

Author information

  • 1Division of Urology, University of California San Diego Medical Center, San Diego, California, USA.

Abstract

INTRODUCTION:

Penile Kaposi's sarcoma (PKS) is a rare and poorly characterized disease. Kaposi's sarcoma is common in HIV disease and is an AIDS-defining illness. This study aimed to review epidemiologic characteristics and changes in the incidence of PKS using a total population-based database.

MATERIALS AND METHODS:

Data from the California Cancer Registry (CCR) were reviewed for the years 1988-2004, identifying all cases of penile cancer. Tumors were classified by histology and stage. Annual age-adjusted incidence and actuarial survival rates were calculated for the overall population and subdivided histology.

RESULTS:

From 1988-2004, 2870 cases of penile cancer were identified. Squamous cell carcinoma accounted for 87% of all penile cancer (n = 2507), and PKS was the second most common, accounting for 4.6% (n = 132). Patients diagnosed with PKS demonstrated a significantly lower mean age (years) than the overall cohort (43.7 versus 62.6, p < .0001). The incidence of PKS peaked in 1992 with a subsequent dramatic decline, the same year as incident AIDS cases. The percentage of all penile cancer comprised by PKS dropped from 7.4% in the 1988-1995 cohort to 1.7% in the 1995-2004 cohort (p < 0.0001). Patients diagnosed with PKS demonstrated a significantly lower 5 (32.8% versus 76.6%, p < .0001) and 10 year (29.5% versus 69.6%, p < .0001) relative overall survival than those with squamous cell carcinoma.

CONCLUSION:

PKS is the second most frequent malignancy of the penis, occurring at a younger age and portending a worse prognosis than other forms of penile cancer. The proportion of PKS tumors has declined in recent years, reflecting improvements in HIV treatment that occurred during the study period.

Comment in

PMID:
22512961
[PubMed - indexed for MEDLINE]
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