Observational Study: Clinical characteristics and Survival Rates in Patients with Prostate Cancer with Normal Prostate-Specific Antigen Concentrations.

Objectives: This study aimed to explore the clinical characteristics of patients with prostate cancer with prostate-specific antigen (PSA) concentrations of less than 4 ng/mL (normal PSA) to provide clinical insights regarding diagnosis and treatment.

Methods: We recruited 35 patients with prostate cancer with normal PSA who were admitted to Xi'an People's Hospital from January 2013 to January 2018, and further determined their clinical characteristics, serum PSA concentration, prostate volume, tumor pathology, surgical margins, seminal vesicle invasion, lymph node metastasis, Gleason score, TNM staging, risk classification, and survival, and described the patients' interventions and treatments. All patients and their families signed informed consent forms before enrollment.

Results: In our study, we observed a 3-year survival rate of 77.14% for patients with prostate cancer and normal PSA concentrations. This outcome can be attributed to several clinical characteristics, including the absence of obvious clinical presentation, a high detection rate of seminal vesicle invasion, as well as high Gleason scores and risk levels. The primary outcome, 3-year survival rate, reflects the long-term prognosis of this specific patient subgroup. We also conducted correlation analyses to better understand the relationships between these clinical characteristics and patient survival.