Imaging of primary vaginal lymphoma

Two cases of primary vaginal lymphoma are reviewed and their imaging features presented. On sonography, both lesions appeared as well defined, slightly lobulated masses of medium to low echogenicity. On computed tomography (CT) the lesions were well circumscribed and of homogeneous density similar to that of muscle. Magnetic resonance (MR) imaging in one case after treatment showed a non-enhancing lesion of intermediate signal intensity on T1- and T2-weighted images. Ultrasound was particularly useful in one case where the lesion was shown to be separate to the uterus--a fact which was not easily appreciated on CT. The differential diagnosis is discussed.