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The urachus is also subject to neoplasia. Urachal adenocarcinoma is histologically similar to adenocarcinoma of the bowel. Rarely, urachus carcinomas can metastasise to other regions of the body, including pelvic bones and the lung. [7] One urachal mass has been reported that was found to be a manifestation of IgG4-related disease. [8]
If the urachus fails to close during fetal life, it can result in anatomical abnormalities such as a urachal cyst, urachal fistula, urachal diverticulum or urachal sinus. In very rare cases the urachus can fail to close fully. This can lead to a condition known as a patent urachus (also urachal fistula). Although it is mainly immediately ...
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A urachal diverticulum (also vesicourachal diverticulum) is a congenital disorder caused by the partial persistence of the allantois. The allantois, which later becomes the urachus , connects an embryo's bladder to the yolk sac .
A urachal fistula is a congenital disorder caused by the persistence of the allantois (later, urachus), the structure that connects an embryo's bladder to the yolk sac. Normally, the urachus closes off to become the median umbilical ligament ; however, if it remains open, urine can drain from the bladder to an opening by the umbilicus .
4. Urinary bladder. 5. Urachus. cl. Cloaca. cp. Elevation which becomes clitoris or penis. i. Lower part of the intestine. ls. Fold of integument from which the labia majora or scrotum are formed. m, m. Right and left Müllerian ducts uniting together and running with the Wolffian ducts in gc, the genital cord. ot.
The urogenital sinus is a body part of a human or other placental only present in the development of the urinary and reproductive organs.It is the ventral part of the cloaca, formed after the cloaca separates from the anal canal during the fourth to seventh weeks of development.
Urinary bladder: Urinary bladder: Urinary bladder: 5. Urachus: Urachus: Urachus: i. Lower part of the intestine: i. Lower part of the intestine: i. Lower part of the intestine: cl. Cloaca: cp. Elevation which becomes clitoris or penis (genital tubercle) cc. Corpus cavernosum clitoridis: cp. Corpus cavernosum penis cut short ug. Sinus urogenitalis