Tailgut cyst

Case contributed by Mohammad Taghi Niknejad
Diagnosis almost certain

Presentation

Pelvic pain.

Patient Data

Age: 30 years
Gender: Female
ct
This study is a stack
Axial With
oral contrast
This study is a stack
Axial C+ portal
venous phase
This study is a stack
Axial C+
delayed
This study is a stack
Coronal C+ portal
venous phase
This study is a stack
Sagittal C+ portal
venous phase
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Info

A large unilocular cyst without any solid or abnormal enhancing component was seen behind the rectum in the presacral space. Its diameters are 58 × 44 ×61 mm, and its mean attenuation values measured 7 HU.

A 30 mm intramural mass was noted in the uterine body inferring fibroid.

Case Discussion

Retrorectal unilocular non-enhanced cystic lesion in a patient with pelvic pain is most likely compatible with tailgut duplication cyst. Approximately 50% of patients may have perirectal symptoms, likely pelvic pain and constipation.

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