abnormal testis development abnormal testis cord formation MP:0006418 MPheno.ontology abnormal seminiferous cords abnormal testis cords any structural anomaly in the formation of the attachments derived from the primordial seminiferous cords that differentiate into seminiferous tubules in adolescence; defective testis cord formation is most likely to reflect abnormal function of either Sertoli cells or peritubular myoid (PTM) cells which normally cooperate to deposit a layer of basal lamina that defines the edges of individual testis cords defective testis cord formation impaired testis cord differentiation incomplete testis cord development