Abstract
RATIONALE: Prostatic cyst is a rare disease of the prostate especially in general practice. As it is often asymptomatic, how to manage it is still unfamiliar with, general practitioners (GPs). PATIENT CONCERNS: The 24-year-old man presented with left back discomfort for 1 week without severe pain, dysuria, or fever. DIAGNOSES: Ultrasonography revealed the presence of a 14×14 mm cystic lesion. INTERVENTIONS: The patient was given the medicine and regular follow-up. OUTCOMES: Several days later, he recovered without lower back discomfort. LESSONS: Patients with prostatic cyst of small size and no symptom should be follow-up regularly. Although prostatic cyst of progressive symptoms, large size (2.5 cm or larger), or high serum prostate-specific antigen (PSA) should be timely referred to urological specialists.