1. A case of Behçet's syndrome in which the main complaint was severe pain in the manubrio-sternal joint is described. Arthrodesis relieved the pain.

2. Histological material from a mouth ulcer and from the manubrio-sternal joint showed non-specific inflammatory changes but failed to throw light on the etiology.

1. Two cases of pseudogout are described with an onset acute enough to be mistaken for septic arthritis.

2. The radiological and laboratory investigations for diagnosis are described.