Abstract.
Tailgut cysts, also known as retrorectal cystic hamartoma believed to originate from the remnant of the embryonic post-anal gut [1]. Tailgut cysts often are asymptomatic and differential diagnosis cystic adnexal mass [2]. When evaluating ovarian cysts, it is important to consider no ovarian disease processes that may mimic those of the ovaries, because a misdiagnosis can profoundly affect patient management [2]. MRI has become the modality of choice to image tailgut cysts [3]. MRI image demonstrating well-defined cystic lesion, anterior to the sacrococcygeal bones, which bowed the levator ani anteriorly as well as the anal canal and rectum [1–3]. Transrectal ultrasound and CT imaging have proved valuable in the diagnosis of these lesions [4]. In general, biopsy is almost never indicated. The treatment of choice is complete surgical excision [5]. Laparoscopic approach could be applied as a feasible, minimally invasive and safe option for low-lying retrorectal tumors [6]. Tailgut cysts may become problematic during labor causing obstruction of the birth canal and the need to convert to Caesarian section [5]. Microscopic examinations, the walls of the cyst were partially lined with stratified columnar epithelium and squamous epithelium., the final diagnosis was tailgut cyst. There was no evidence of malignancy [3]. Tumor markers such as CA-125 generally are not helpful in pregnancy, because they can be elevated as a result of the pregnancy itself [7].
Ovarian cysts complicating pregnancy are more common. Tailgut cyst initially misdiagnosed as ovarian cyst in pregnancy. It is important to understand the relationship of a mass with its anatomic location, identify normal ovaries at imaging, and relate imaging findings to the patient’s clinical history to avoid misdiagnosis [2, 6].