Calcification in retroperitoneal non-Hodgkin lymphoma prior to treatment: a case report.

Calcification in malignant lymphoma before treatment is rare. Here we report a case of low grade non-Hodgkin lymphoma of sclerosing type presenting as a retroperitoneal calcified mass. The calcification was demonstrated with various imaging modalities, including conventional radiographs, sonography, computed tomography (CT) and magnetic resonance (MR) imaging. This case and other isolated reports show that radiographical examinations may, rarely, reveal calcification in lymphoma prior to treatment.