Sarcoma botryoides: MRI findings in two patients.

We report the magnetic resonance (MR) findings of sarcoma botryoides in two young pediatric patients with this tumor. There has been very little literature regarding the MR appearance of this subtype of rhabdomyosarcoma. In both cases, the tumor was vaginal in origin, as would be expected in this age group. We found areas of bright T2 signal within these lesions, intermixed with areas of lower T2-signal tissue, which showed considerable enhancement. These imaging findings are reflective of the histologic architecture of these lesions, which are composed of separate myxoid and subepithelial cellular zones. In both cases, the extent of the tumor and lack of local invasion or metastatic disease were confirmed surgically, and both patients have undergone multiple postoperative MR studies that have shown lack of residual, recurrent, or metastatic disease. Copyright (c) 2009 Wiley-Liss, Inc.