This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urology, Subject name: Surgery
A 70-year-old gentleman underwent TURP. Prostate specimen showed malignant histology. What is the next step? 
Select and explain. 
A. Radical Prostatectomy, B. Active surveillance, C. External beam radiotherapy, D. Bilateral orchiectomy
B: Active surveillance
Answer: B: Active surveillance 
Explanation: T1 disease: These are incidentally found tumours in a clinically benign gland after histological examination of a prostatectomy specimen.For men in their 70s with low-risk disease, conservative treatment would usually be the correct approach.Low-risk prostate cancer (low PSA, small foci of Gleason6 disease) can be managed by active surveillance. Here, with 3- to 6-monthly digital rectal examination (DRE) and PSA measurement and repeated prostate biopsy.Bailey and Love 27e pg: 1473