Tail gut duplication cyst
Recent (2 mths) surgery for piles. USG to rule out submucosal abscess.
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An anechoic lesion with a well-defined wall (1-2 mm thickness) is noted at 6 o'clock.
It abuts posterior anal canal wall.
Size: 51 x 30 x 28 mm.
The lesion is about 35 mm away from the anal verge.
No abscess / sinus tract is noted.
Colonoscopic high frequency mini probe ultrasound was done by gastroenterologist who suggested the diagnosis of duplication cyst.
No other cyst was noted along rest of the colon.