urachus


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Related to urachus: patent urachus

urachus

 [u´rah-kus]
a fetal canal connecting the bladder with the allantois, persisting throughout life as a cord (median umbilical ligament). adj., adj u´rachal.
patent urachus a condition in which the urachus remains a hollow tube connecting the bladder and the umbilicus, resulting in an umbilical urinary fistula.

u·ra·chus

(yūr'ă-kŭs),
That part of the allantois between the apex of the bladder and the umbilicus; postnatally, the urachus is normally merely a fibrous cord, the median umbilical ligament, but occasionally the allantoic lumen may persist as a urachal fistula.
[G. ourachos, the urinary canal of a fetus]

urachus

A vestigial structure located at the bladder apex which connects the bladder with the allantois in the embryo. The lumen of the urachus may persist in one-third of adults and traverse the bladder wall as a tubular or cystic structure of little clinical significance.

ura·chus

(yūr'ă-kŭs)
That portion of the allantois between the apex of the bladder and the umbilicus; becomes the median umbilical ligament.
[G. ourachos, the urinary canal of a fetus]

urachus

A primitive structure in the embryo from which the bladder develops. Later it is represented by a fibrous cord that extends from the top of the bladder to the UMBILICUS.
References in periodicals archive ?
Surgical treatment, such as mass excision, urachectomy, or urachectomy combined with partial cystectomy, is the first-line and definitive treatment for mucinous cystadenomas of the urachus. All 9 reported patients with mucinous cystadenoma survived the tumor without evidence of recurrence for up to 97 months of follow-up.
In addition to malignant urachal tumors, several other intermediate and benign tumors or conditions of the urachus have been reported some mimicking urachal cancer and thus posing a differential diagnostic problem.
In our case, the presence of a midline cavity, anterosuperior to the bladder dome, filled with low attenuation fluid, suggested adenocarcinoma of the urachus as the main diagnosis.
Similarly, the total number of reported cases of UL RMS in pediatric patients, either in the obliterated umbilical arteries (medial UL) or in urachus (median UL), is 17 including these 2 new cases (Table 3) [5, 7-9, 24-31].
The urachus carcinoma accounts for <1% of all bladder cancers [2, 3].
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.
(1,2) The most likely site of origin is the appendix, though other primary sites include the large and small bowels, stomach, bile ducts, gallbladder, pancreas, ovary, fallopian tubes, urachus, urinary bladder, breast, and lung.
Direct extension along the ligaments of embryonic origin have been described including the round ligament of the liver, the urachus, the vittelointestinal duct remnant, and the obliterated vitelline artery.
This infection may occur soon after the birth and may also result in omphalitis omphalophlebitis omphaloarteritis or urachitis of the urachus (Ganga that become source of navel infection include when an umbilical cord is cut at a level very close to abdominal wall of calf poor navel hygiene practices and unfavorable environmental conditions such as parturition of cow in unhygienic calving pens inadequate colostrum feeding within six hours after calving or having the umbilical stump sucked on by other calves if newborn calf is mixed with other calves after calving (Smith 2003).
Applying Caris Molecular Intelligence's multi-technology approach, including immunohistochemistry (IHC), in situ hybridization (ISH), and gene sequencing (next-generation and Sanger sequencing) analysis, 592 locally advanced or metastatic UC tumours were studied, out of which 463 (87.5%) were cases of bladder UC, 74 (12.5%) of non-bladder UC (renal pelvis, ureter, urachus, urethra), and 55 were other histotypes (27 adenocarcinomas, 17 squamous cell carcinomas, 11 small cell carcinomas).
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).