The presence of a low-grade and low-stage lymphoma, confirmed by a haematological evaluation, and the simultaneous evidence of an adenocarcinoma after transurethral resection of the prostate for acute urinary retention, do not require any immediate treatment due to their long-term survival rate and the follow-up should be based on periodical PSA evaluation and complete blood count [5]. This evidence concerns the gene KLK3 and adenocarcinoma.