[Portal vein thrombosis and Prevotella melanigenica revealing an appendicular abscess].

Introduction: The misleading aspects of appendicitis are multiple. We report an observation, original not only from a clinical and bacteriological point of view but also because of the presence of a portal vein thrombosis.

Observation: A 48 year-old man was hospitalized for prolonged fever.

[Detection of platelet antibodies in idiopathic thrombopenic purpura].

The authors report the results of Dixon's assay modified by Follea in 24 cases of idiopathic thrombocytopenic purpura. The level of immunoglobulin G bound to platelet membrane was increased in 91 p. 100 of patients in the acute phase of the disease.

[Anemia and dysmyelopoiesis with marker chromosome and transferrin receptor anomaly].

A 64-year old man presented with microcytic hypochromic aplastic acquired anemia without iron depletion. His bone marrow was hypercellular with dyserythropoiesis and no stainable iron deposits. 59 Fe incorporation by erythroblasts was reduced, and the karyotype revealed an aneuploidy with marker chromosome.