PMC4887582_01
Pelvic MRI: A sagittal view showing the retrorectal cyst (white arrow).
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A pelvic MRI was performed (Fig. 1) and revealed the existence of a cavity below the medial caudal region that was in contact with the subcutaneous cellular tissue and nearly in contact with the ilio-coccygeal muscles.
Pelvic MRI, liquid collection (<2 cm) between the sacrum and rectal posterior wall, cyst recurrence.
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April 2011 showed stellate scar tissue formation in the caudal region. A new MRI was performed 5 months later (Fig. 2) and revealed a fluid deposit that was under 2 cm in diameter.
Excision of the lower half of the lesion using the sacrococcygeal approach (6.5 x 4 x 2.5 cm).
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We did not oberve any cartilage nodules or malignant elements (Fig. 3, Fig. 4, Fig. 5) .
HES stain (hematoxylin eosin saffron), x25 magnification (left), x400 magnification (right).
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We did not oberve any cartilage nodules or malignant elements (Fig. 3, Fig. 4, Fig. 5) .