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Cancer of unknown primary eventually diagnosed as poorly differentiated prostate cancer: a case report
Kazutaka Iijima1,2, Toshizo Takayama3, Satoko Shindo3
1Department of Medical Oncology, Tonan Hospital, Sapporo, Hokkaido, Japan. sapmed.ippi@gmail.com.
Background:
Prostate cancer has been well known to have a high prevalence among middle-aged and older men, with high incidence of metastases to the bone-the main metastatic site. However, prostate cancer among those less than 50 years of age is extremely rare, and neck swelling is seldom the initial symptom.
Case Presentation:
We herein report case of a 47-year-old Japanese male with poorly differentiated prostate cancer that had been initially diagnosed as a cancer of unknown primary with multiple lymph node and bone metastases before reaching a definitive diagnosis. The patient has been started on endocrine therapy and is currently alive without progression.
Discussion And Conclusion:
When locating the primary lesion in men with cancer of unknown primary, it is important to consider the possibility of prostate cancer, confirm serum prostate-specific antigen levels, and perform local prostate evaluation.
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