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Sonographic in utero diagnosis of Klippel‐Trenaunay‐Weber syndrome.

The Klippel-Trenaunay-Weber syndrome (KTWS) is a sporadically occurring rare disorder that may present with a myriad of limb and cutaneous abnonnalities. However, prerequisite for the diagnosis of this syndrome is the triad of cutaneous hemangiomata, limb hypertrophy, and varicosities. 1 Few reports of in utero diagnosis of KTWS appear in the current medical literature, 2-' and these relate to cutaneous lesions involving the trunk and one or more extremities with associated hypertrophy, most commonly of a lower extremity. We report a patient in whom the in utero findings were localized to the trunk and a single upper extremity and in which the diagnosis was made on the basis of unilateral extremity soft tissue prominence and limb lengthening.