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Sonographic Pitfalls in the Diagnosis of Enteric Duplication Cysts

¹ Department of Diagnostic Radiology, Queen's University, Kingston General Hospital, 76 Stuart St., Kingston, ON K7L 2V7, Canada.
² Department of Diagnostic Imaging, The Hospital for Sick Children, Toronto, ON, Canada.
³ Department of Surgery, Queen's University, Kingston General Hospital, Kingston, ON, Canada.
⁴ Department of Pathology and Molecular Medicine, Queen's University, Kingston General Hospital, Kingston, ON, Canada.

OBJECTIVE. The sonographic double wall sign has been well described in the literature and is often the cornerstone in suggesting the diagnosis of an enteric duplication cyst. We report two cases with this sign that were erroneously diagnosed as enteric cysts and a third case without this sonographic feature that proved to be a duplication cyst. Histologic analysis of the specimens helps explain the cause of the sonographic pitfalls.

CONCLUSION. The potential sonographic visualization of the split hypoechoic muscularis propria layer or identification of all five layers will increase the specificity in making the sonographic diagnosis of duplication cyst.

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