Cystic lymphangiomas: CT diagnosis and thin needle aspiration

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Abstract
Cystic lymphangiomas of the retroperitoneum are rare benign tumours (Castellino & Finkelstein, 1975) which have previously been difficult to diagnose by conventional radiographic techniques (Hamilton & McInerney, 1981). These tumours have been evaluated by several modalities: computed tomography, ultrasound, thin needle aspiration, and lymphangiography and in one case a correct diagnosis was suggested preoperatively (Radin et al, 1983). We describe two cases of cystic lymphangioma of the retroperitoneum demonstrated and diagnosed by computed tomography and thin needle aspiration. The first case was proven to be a cystic lymphangioma at surgery. The second case, after its CT demonstration and thin needle aspiration, was managed conservatively and followed by computed tomography. In the appropriate clinical setting, conservative management of these benign tumours might well be considered.

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