Diphallia is usually accompanied by systemic anomalies, their extent varies, ranging from no associated anomaly to multiple anomalies including urogenital, gastrointestinal and musculoskeletal systems. There is also a higher risk of spina bifida. He had a patent anus, one bladder, one normal urethra, normal gastrointestinal and genitourinary systems. Iranian Journal of Pediatrics. The secondary penis had glans but without urinary meatus. International Journal of Genetics and Molecular Biology. This structure had no communication with any other structures. Human physiology: an integrated approach. A male inherits an X chromosome from mother and a Y chromosome from father.