[Multicentric reticulohistiocytosis (lipoid dermato-arthritis). A radiologic study of 3 cases].

The authors report their experience with 3 cases of multicentric reticulohistiocytosis observed over 6 years of outpatient radiological practice. The condition presents with the following radiological patterns: 1) clear-cut erosions of the articular surfaces, especially in the distal interphalangeal joints of the hands and in the metatarso-phalangeal joints of the feet, with symmetrical distribution (not necessarily); 2) osteolytic punched-out areas in the epiphyseal spongiosa, ranging in size from 1 mm to over 1 cm; 3) no osteoporosis, no osteo-proliferative or periosteal reactions, not even in the presence of large osteoarticular destructions; 4) frequent atlanto-epistropheal subluxation; 5) articular ankylosis at the sacroiliac joints only. The association of the above patterns and the relatively benign clinical course distinguish multicentric reticulohistiocytosis from rheumatoid arthritis, psoriasis arthritis, erosive osteoarthritis, and gout.

Arteriovenous fistula of the mandible: a review of the literature and report of a case.

The authors, after a careful review of the literature during the last 15 years concerning arteriovenous malformation (AVM) of the jaws, report a case of congenital arteriovenous fistula of the mandible characterized by several episodes of spontaneous hemorrhage requiring emergency hemimandibulectomy. Radiologic, arteriographic and pathologic aspects of this lesion are discussed. Even though nomenclature concerning AVM of the jaws is confusing the authors draw attention to the embryologic features which are responsible for these lesions.

[Intraosseus lipoma (author's transl)].

A case of intraosseus lipoma of the rib is presented, when showed bone expansion and endothoracic tumour. Emphasis is put upon the arteriographic findings ("angiolipoma"). This case is perhaps the 31st in the literature, but sometimes these tumours are not diagnosed or not histologically classified.

[Arteriography in the diagnosis of renal tumors].

Renal angiography with some technical improvements (simultaneous multiple tomography, administration of epinephrine) is still the most reliable method for the diagnosis of a renal tumor; nevertheless, there are limits that this method can not overcome, and an error is always possible. The matter is discussed and a number of cases are reported.