a brief review of the literature reveals three possibilities : -- lymphatic metastasis of an infraclinical testicular seminoma , -- extra-nodal retroperitoneal metastasis of a testicular tumour , -- retroperitoneal seminomatous tumour developing in embryonic rests of germinal tissue which might possibly be complicated by a retroperitoneal lymph node metastasis .
C0024232
lymphatic metastasis
C0027627
metastasis