Mesorectal Nodal Metastasis with Seminal Vesicle Invasion in Biochemically Recurrent Prostate Cancer.

F-DCFPyL-PET/CT. pT3b disease is associated with 4.31-fold significantly increased odds of MLN metastasis. These findings suggest alternate drainage routes for PCa cells, either via alternate lymphatic drainage from the seminal vesicles themselves or secondary to direct extension from posteriorly located tumors invading the seminal vesicles.