Contrast medium filling of the corpora cavernosa penis (cavernosography) was performed in 17 males suffering from impairment in penile erection. In the majority of the cases representing deviations and painful, or frequent nocturnal erections, there were no definite roentgenological abnormalities of the erectile tissue in the non-erected penis. In 2 cases with incomplete elevation there was severe loss of functioning erectile tissue demonstrable.