Perirenal tailgut cyst (cystic hamartoma)

Sung, Ming-Tse; Ko, Sheung‐Fat; Niu, Chi‐Chien; Hsieh, Chih-Sung; Huang, Hsuan-Ying

doi:10.1016/s0022-3468(03)00408-1

Cited by 29 publications

(30 citation statements)

References 10 publications

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“…Malignant degeneration is rare, but some reports described adenocarcinoma or, less frequently, carcinoid tumor arising in tailgut cysts [1,[4][5][6][7]. Two cases of perirenal cystic hamartoma have been reported with no retrorectal component; whether these lesions represent ectopic tailgut cysts or a different pathology is still unclear [8,9].…”

Section: Discussionmentioning

confidence: 99%

CT and MR findings of a retrorectal cystic hamartoma confused with an adnexal mass on ultrasound

et al. 2004

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We describe the imaging features of a tailgut cyst mistaken for an adnexal mass. A pelvic ultrasound in a 28-year-old woman showed a 10-cm hypoechoic left pelvic mass. Having not seen the left ovary, the radiologist concluded that the mass was an endometrioma. CT disclosed a retrorectal cystic lesion with wall calcifications and internal septa. MR confirmed the extra-ovarian location of the tumor, which was hyperintense on T2-weighted images and had an intermediate signal on T1-weighted images. Surgery revealed a retrorectal cystic hamartoma. Radiological diagnosis of a tailgut cyst requires first correct localization of the tumor and then differentiation from other retrorectal masses.

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Section: Discussionmentioning

confidence: 99%

CT and MR findings of a retrorectal cystic hamartoma confused with an adnexal mass on ultrasound

et al. 2004

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“…Other types include transitional, pseudostratified columnar, ciliated columnar, goblet cell-rich simple columnar, stratified columnar, and simple cuboidal epithelium. 9 Scattered smooth muscle bundles are almost always present in the cyst wall, and in about 50% of cases, these concentrically surround the periphery of the cysts. 3,6 Acute or chronic inflammation may be present.…”

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confidence: 99%

“…However, tailgut cysts lack neural plexuses, and the smooth muscle does not form a complete, organized muscular layer. 3,4,9 Duplications of the colon have been reported infrequently in dogs and a horse and can resemble retrorectal cysts in appearance. 1 Juvenile polyps are another type of congenital tumor that share some characteristics with the mass found in this foal.…”

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confidence: 99%

Congenital Cystic Polypoid Rectal Hamartoma in a Newborn Foal

Dunkel¹,

Shokek²,

Wilkins³

2004

Vet Pathol

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Abstract.A neonatal foal with signs of rectal bleeding was diagnosed with an intraluminal rectal mass and intussusception on surgical exploration of the abdomen. Histologically, the mass consisted of cystic spaces lined by simple columnar epithelium with numerous goblet cells and was surrounded by thin bands of smooth muscle in a myxomatous stroma. Although the mass shared similarities with retrorectal cystic hamartoma (tailgut cyst) and juvenile polyps, described in human medicine, location and histologic findings were not entirely consistent with either condition.Key words: Equine; foal; juvenile polyp; rectal hamartoma; tailgut cyst.An 18-hour-old Thoroughbred colt presented to the University of Pennsylvania George D. Widner Hospital with the complaint of bleeding from the rectum thought to originate from a rectal tear after administration of two enemas.Upon presentation, a large amount of blood was noted on the foal's tail and perineum, and mild signs of neonatal encephalopathy were evident. During the initial evaluation, the foal exhibited continuous straining to defecate resulting in prolapse of hemorrhagic rectal mucosa. On the basis of digital palpation of the rectum, a full thickness rectal tear was suspected, other differential diagnoses at the time included intussusception and necrotizing enterocolitis. Upon surgical exploration of the abdomen, an intraluminal tubular soft tissue mass was identified in the most orad aspect of the rectum. The mass was attached to the rectal wall by a stalk 24 cm orad from the anus. The adjacent small colon had formed an intussusception with the intussusceptum bypassing the mass. The affected small colon and rectal segment, including the mass was resected, placed in 10% neutral buffered formalin, and submitted for histopathologic examination.Grossly, the mass was cylindrical with a tapering apex and measured 6.5 ϫ 5.0 ϫ 3.0 cm (Fig. 1). It had a cylindrical stalk, 1.5 cm long, 1.0 cm in diameter, attached to the rectal mucosa. The surface was smooth, gray-green, and covered with meconium. On cut surface, it consisted of numerous small cysts (up to 1.5 cm in diameter) filled with clear fluid. Thin septa of firm, pink-white stroma separated the cysts.On histopathologic examination, the mass was covered with a single layer of normal rectal mucosa (Figs. 2, 3). It contained numerous large cystic spaces lined by a well-differentiated simple columnar epithelium with frequent admixed goblet cells. The cysts were separated by abundant, myxomatous stroma. Thin bands of well-differentiated but unorganized smooth muscle were scattered throughout the stroma and often surrounded the cystic spaces. A diagnosis of cystic polypoid rectal hamartoma was made.The foal was euthanatized because of fibrinous peritonitis and incisional dehiscence 4 days after surgery. On postmortem examination, there was perforation of the small colon approximately 1.5 cm orad to the anastomosis site, severe fibrinous peritonitis with adhesion formation, and herniation of omentum into the subcutis through a g...

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“…The lesion is believed to arise from the embryonic postanal gut [1][2][3]. It is mostly found within…”

Section: Case Report Introductionmentioning

confidence: 99%

“…the retrorectal or presacral space [4] and rarely in the perirenal area [2,3,5], the subcutaneous tissue in the anorectal region [6] and more rarely in the prerectal location. Microscopically, the tailgut cyst is characterized by the presence of a cysts lined with varying types of epithelium; columnar, mucin secreting epithelium predominates, while other areas of squamous and transitional epithelium often coexist [7].…”

mentioning

confidence: 99%