ABSTRACTA 24-year-old man was being followed for dilated cardiomyopathy. He presented with bipolar aphthosis and a painless pulsatile abdominal mass. A CT scan showed abdominal aortic and superior mesenteric artery aneurysms and pulmonary embolism. The diagnosis of Behçet’s disease was accepted. The initial course was favorable under corticosteroid therapy.

We report a case of haemophagocytic lymphohistiocytosis associated with acute myeloid leukaemia. The usual etiologies of haemophagocytic lymphohistiocytosis, including viral infections, were negative. Haemophagocytic lymphohistiocytosis secondary to acute myeloid leukaemia is often underestimated and undiagnosed. Haemophagocytic lymphohistiocytosis may be masked by the tumour process, often making the diagnosis difficult.

We report a 24-year-old female patient with a neurological deficit without fever or meningeal syndrome. HIV serology was negative and CD4 count was normal. Cerebrospinal fluid analysis revealed the presence of Cryptococcus neoformans. Neuromeningeal cryptococcosis was suspected. The initial course was favourable with antifungal therapy.

A 75-year-old man with an aortic bioprosthesis was admitted with polyarthritis in a non-febrile setting. Blood cultures were positive for Listeria monocytogenes. The diagnosis of Listeria endocarditis and spondylodiscitis was evoked. These are two unusual forms of listeriosis.The evolution was favourable after antibiotic therapy.

Amyloid arthropathy is often underdiagnosed. The articular forms of AL amyloidosis may mimick the rheumatoid arthritis. The presence of macroglossia should draw attention to chronic polyathralgia.