Abstract
Sir, Dr. Hur and colleagues have provided an excellent pictorial essay on imaging features of gastrointestinal (GIT) duplications in infants and children [1]. We would like to elaborate upon the following sonographic features of GIT duplications. The authors describe the characteristic sonographic appearance of small-bowel duplication cysts as consisting of an inner hyperechoic rim and an outer surrounding hypoechoic layer. They also mention the potential pitfalls. Cheng et al. [2] have recently suggested that a Y-shaped configuration of the hypoechoic outer layer (representing the muscularis propria) may be more reliable in the diagnosis of duplication cysts. Although demonstrated in vitro by the authors, this sign has not yet been demonstrated in vivo. Another sonographic sign that may be noted in patients with duplication cysts is peristaltic contractions in the cyst wall [3]. We recommend that sonographers actively search for these signs to arrive at a confident preoperative diagnosis of duplication cyst.
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