has part has part has_part characteristic of abnormal testis development abnormal testis cord formation incomplete testis cord development abnormal seminiferous cords defective testis cord formation 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 MPheno.ontology impaired testis cord differentiation MP:0006418 testis sex cord