Littre mentions a patent urachus in a boy of eighteen.
"Anomalies and Curiosities of Medicine" by George M. Gould
In very rare cases open urachus may exist without any joint inflammation.
"The Veterinarian" by Chas. J. Korinek
DISCHARGE OF URINE BY THE NAVEL, OR PERSISTENT URACHUS.
"Special Report on Diseases of the Horse" by United States Department of Agriculture
The cord also contains the urachus (2') which carries urine from the bladder (2) through the cord.
"Special Report on Diseases of Cattle" by U.S. Department of Agriculture
He failed, however, to trace the connexion of the urachus with the bladder.
"Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 1" by Various