MR imaging of complex tail-gut cysts

Moulopoulos, Lia A.; Karvouni, Evangelia; Kehagias, Dimitrios; Dimopoulos, Meletios Α.; Gouliamos, A.; Vlahos, Lambros

doi:10.1016/s0009-9260(99)91072-3

Cited by 38 publications

(32 citation statements)

References 8 publications

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“…Mucinous or proteinaceous component of the cyst fluid demonstrated in most of the cases on histological examination was assumed to be the cause of this high signal intensity, and no blood product nor fat was found either radiologically or histologically within the lesions. An intermediate to high signal on T1-weighted images with or without hyperintense foci has already been reported in TGC [2,3,5,6,8,18,19]. Yang et al [7] reported hypointense TGCs on T1-weighted images, but their standard of reference was the signal intensity of fat, whereas ours was that of muscle.The cystic lesion consisted of a unilocular cyst in only one case.…”

Section: Discussionmentioning

confidence: 59%

“…TGCs involving the ischioanal fossa reported in the literature so far were large TGCs primarily developed in the retrorectal space with a downward and lateral extension to the ischioanal fossa as in four cases in our series [4,5,12,15,16]. However, the development of tailgut vestiges that may reside in the ischioanal fossa [13] can possibly lead to the formation of TGC in this space.…”

Section: Discussionmentioning

confidence: 63%

“…The appearance of the surrounding fat, muscles and bones was also recorded. These features were selected from the previous case reports and our personal experience [2][3][4][5][6][7][8].…”

Section: Image Reviewmentioning

confidence: 99%

“…Since this initial description, reports in the radiology literature have been limited [2][3][4][5][6], the largest series by Yang et al consisted of five patients [7]. TGC are often fortuitously discovered.…”

Section: Introductionmentioning

confidence: 99%

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Tailgut cysts: MRI findings

et al. 2008

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Magnetic resonance imaging (MRI) features of 11 surgically resected pelvic tailgut cysts were analyzed with reference to histopathologic and clinical data. Homogeneity, size, location, signal intensity, appearance and presence of septa and/or nodules and/or peripheral rim and involvement of surrounding structures were studied. Histological examination demonstrated 11 tailgut cysts (TGC), including one infected TGC and one TGC with a component of adenocarcinoma. Lesions (3-8 cm in diameter) were exclusively or partly retrorectal in all cases but one, with an extension down the anal canal in five cases. Lesions were multicystic in all patients but one. On T1-weighted MR images, all cystic lesions contained at least one hyperintense cyst. The peripheral rim of the cystic lesion was regular and non or moderately enhancing in all cases but the two complicated TGC. Nodular peripheral rim and irregular septa were seen in the degenerated TGC. Marked enhancement of the peripheral structures was noted in the two complicated TGC. Pelvic MRI is a valuable tool in the preoperative evaluation of TGC.

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Section: Discussionmentioning

confidence: 59%

Section: Discussionmentioning

confidence: 63%

“…The appearance of the surrounding fat, muscles and bones was also recorded. These features were selected from the previous case reports and our personal experience [2][3][4][5][6][7][8].…”

Section: Image Reviewmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tailgut cysts: MRI findings

et al. 2008

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“…They are most frequently multilocular, often with a large central cyst and smaller peripheral or daughter cysts [9,10]. Signal intensity or attenuation is variable depending on cyst contents, and may be classically cystic, that is fluid-attenuation on CT or T1 hypointense and T2 hyperintense on MRI [9,11,12]. Alternatively, the fluid may be proteinaceous/hemorrhagic, that is high-attenuation on CT or T1 hyperintense on MRI [10].…”

Section: Diagnosis and Imagingmentioning

confidence: 99%

Imaging of tailgut cysts

et al. 2015

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Tailgut cysts are congenital lesions that arise from the primitive hindgut in the true embryonic tail but fail to regress during gestation. These lesions are rare and more frequently encountered later in life and more commonly in women, and are the most common primary retrorectal tumor. Tailgut cysts may be asymptomatic or cause rectal bleeding, pain, or symptoms related to mass effect on the rectum or bladder. Pathologically, tailgut cysts are typically multilocular, lined with a variety of epithelial cell types, and are most frequently benign. Imaging is the linchpin of diagnosis due risks associated with biopsy. The purpose of this pictorial review is to present the spectrum of imaging findings associated with tailgut cysts on CT and MRI with focus on the use of advanced MRI and diffusion-weighted imaging. We present case examples of tailgut cysts, their CT and MR imaging findings, and diagnostic and management considerations.

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