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Beyond the norm: exploring the uncommon squamous cell carcinoma of the prostate using a Saudi tumor registry
Ahmed Alasker1,2,3, Areez Shafqat4, Belal Nedal Sabbah4
1College of Medicine, King Saud bin Abdulaziz University for Health Sciences.
Background:
Squamous cell carcinoma (SCC) of the prostate has limited treatment choices and portends a dismal prognosis with an average survival time of ~14-months. This study provides a descriptive overview of SCC of the prostate in Saudi Arabia.
Materials And Methods:
A retrospective cohort study of patients diagnosed with prostatic SCC between 1 January 2008 and 31 December 2017. Information on demographic and tumor characteristics and the survival of patients was collected from the Saudi Cancer Registry. Survival was depicted through Kaplan-Meier plots. Fisher's exact test was used to assess the association between categorical variables and death, while a Wilcoxon rank sum test was applied for numerical variables.
Results:
Out of a larger subset of 3607 patients, 16 patients were diagnosed with prostatic SCC, of which half resided in the Central region (50.0%) and most (81.2%) were aged greater than or equal to 60 years. Most patients (62.6%) had poorly differentiated (grade III, 43.8%) lesions, and 50% of cases were metastatic at diagnosis. 62.5% of patients died, all residing in the Eastern and Central regions. Regional extension (75.0%) and distant metastasis (87.5%) were significantly associated with death compared to localized lesions (0.0%) (P=0.022). The 5-year survival rate in our study was 33%.
Conclusion:
The present study is the first to describe the characteristics of prostatic SCC in Saudi Arabia. Our results are consistent with prior studies showing that prostatic SCC is often high-grade and metastatic at diagnosis, conferring a poor prognosis.
