[Angio-follicular lymph node hyperplasia (Castleman's lymphoma)].

Two patients with angio-follicular lymph node hyperplasia are described, and the literature is reviewed. In one symptom-free man, the chest x-ray showed a tumour of the upper mediastinum the size of a fist (which is known to have been present for 20 years), in another man there was a 4 cm. node in the right hilum, which was shown by computer tomography not to be due to vessels. In each case the tumour was removed. Histologically they proved to be a hyaline-vascular type of angio-follicular lymph node hyperplasia. This is probably an inflammatory-reactive process.