urachus


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Related to urachus: patent urachus

urachus

[′yu̇r·ə·kəs]
(embryology)
A cord or tube of epithelium connecting the apex of the urinary bladder with the allantois; its connective tissue forms the median umbilical ligament.
References in periodicals archive ?
Glandular tumours of the urachus remain sparsely described due to rarity, degree of clinical correlation required to establish urachal origin, and lack of standardized nomenclature.
Early treatment with antibiotics and supportive care may allow resolution of infection before development of abscess and distention of the urachus or the umbilical arteries and vein (Turner et al.
6%), other anorectal and genital malformations were found, namely, imperforate anus in 26 patients, hypospadia in four patients, cloaca in four patients, bladder hypoplasia in three patients, urachus in two patients, ambiguous genitalia in one patient, VACTERL association in one patient, and bladder exstrophy in one patient.
The median umbilical fold, which is the peritoneal covering of the umbilical ligament/ urachus, travels between the bladder and umbilicus in the midline anterior abdominal wall.
4) Other rare sources of PMP include malignancy of the colon (see Figures 3 and 4), stomach, uterus, pancreas, gallbladder, common bile duct and urachus (see Figure 5).
Large pseudocyst of the umbilical cord associated with patent urachus.
1 An extra gonadal location is unusual, but yolk sac tumours have been reported at extra gonadal sites like liver, lung, brain, lateral ventricle, retroperitoneum, mediastinum, psoas muscle, vagina, rectum, urachus, parotid gland, ear, orbit,2 sinonasal tract and nasopharynx.
Persistence of the urachus may be partial giving rise to urachal cysts, urachal diverticulum or sinus, or may be complete allowing communication with the bladder.
During normal development the urachus obliterates to form the median umbilical ligament at around 32 weeks' gestation.
Urine is voided either through the urachus to the allantois, or through the urethra into the amniotic cavity.
Urinary abnormalities include marked dilation of the ureters and kidneys, a large bladder, and often a parent urachus.