title: Mediastinal cystic hygromas: CT characteristics and pathogenetic consideration.
abstract: Two cases of asymptomatic primary mediastinal cystic hygroma in adults are reported. The CT findings, including: paratracheal and paravertebral location; round, smooth, and sharp outline; homogeneous density with low attenuation number; compression of surrounding tissue without gross invasion; and lack of calcification, together with the superior mediastinal location are sufficiently characteristic to suggest the diagnosis.
mesh_terms: D000328:Adult; D000368:Aged; D006801:Humans; D008202:Lymphangioma / Q000000981:diagnostic imaging*; D008297:Male; D008479:Mediastinal Neoplasms / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed