The artery of Percheron is a solitary trunk representing an uncommon anatomic variant that provides bilateral arterial supply to the paramedian thalami and the rostral midbrain. Occlusion of this artery results in bilateral thalamic and mesencephalic infarctions. The clinical diagnosis is difficult because the complex anatomy causes large clinical variability. We report a case of a comatose patient with normal early head-computed tomography and magnetic resonance imaging. A bilateral paramedian thalamic infarct due to an occlusion of the artery of Percheron was revealed two days later by a new head computed tomography. To our knowledge, this is the first report in the literature of a symptomatic patient presenting an acute Percheron stroke with normal early brain magnetic resonance imaging. Our case indicates that a normal initial magnetic resonance imaging cannot formally eliminate the diagnosis of acute stroke of the artery of Percheron. We discuss the causes of noncontributive brain magnetic resonance imaging at the onset of this acute Percheron stroke and the alternative diagnosis and therapy methods.

The population is increasingly using emergency care services around the world. The underlying interrogation is whether this increase is a consequence from a dysfunction in healthcare provision, from a deterioration in the health status of the population or from socioeconomic determinants. We performed geospatial analyses with 3-year 1,081,026 Emergency Medical Services (EMS) responses in Paris and its suburbs. Incidence of calls per population and complaints were compared, at the neighborhood level, with demographic and socioeconomic determinants. Associations with characteristics of the health system such as the density of primary care doctors were also studied. Spatial autocorrelations were searched with Moran's I analyses. We found a positive correlation between the incidence of EMS calls by population for respiratory problems, and the level of poverty as well as the unemployment rate (p < 0.001). There was no significant correlation between psychiatric complaints and socioeconomic determinants. There was a strong correlation between calls for birth or imminent birth by woman of childbearing age and the unemployment rate among women, the unemployment rate overall and household median household income (p < 0.001). There was no correlation between the density of primary care providers and EMS activity by population. EMS data allowed us to powerfully identify specific socioeconomic determinants of health for a 7 million-inhabitant population at the district level. Results could be used to design and implement tailored public health interventions for maximum impact. The overuse of emergency services does not seem to stem solely from the decrease in the supply of primary care doctors. Innovatively, monitoring the actual use of emergency services could responsively inform policy makers and agencies responsible for prevention and health promotion about the specific needs of the population and the consequences of decisions on the organization of the provision of care. Key messages The use of emergency services is a valid metric to evaluate the health status of the population and identify socioeconomic determinants. It gives specific guidelines for public health interventions. Geospatial analyses can efficiently identify the specific needs of a population at the neighborhood level. It can participate to the evaluation of the organization of healthcare provision.

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Introduction Assessment of the medical fitness to serve in the armed forces has two objectives: to prevent the military operations from being jeopardized by a medical issue, and to protect soldiers from the sequelae of diseases that could become complicated in the operational field, especially in overseas operations where soldiers are exposed to a remote setting and a long evacuation time. Little is known about fitness decisions for soldiers with systemic or autoimmune diseases. Therefore, we conducted a single-center retrospective study of internal medicine fitness decisions. Materials and Methods All the fitness decisions discussed from September 2019 to December 2020 in our department of internal medicine were reviewed. Gender, age, army or service, rank, garrison and health topic were collected from the medical files. Our Military Hospital local ethics committee, in accordance with the French law, approved this study. Results There were 41 cases, involving 31 men and 10 women (mean age: 31 years), presenting with autoimmune or systemic diseases, metabolic disorders, thrombophilia, congenital or acquired malformations or organ failure, miscellaneous nephropathies, or hemogram abnormalities. Four patients were taking immunosuppressive agents, 3 biologics, and 4 anticoagulants. Among the 15 civilians requiring medical fitness assessment to enlistment, 6 were declared fit. They presented with a history of juvenile idiopathic arthritis with intermediate uveitis without relapse for 7 years, Mayer-Rokitansky-Küster-Hauser syndrome type II with ectopic kidney, solitary kidney with normal renal function and with hypertension, isolated proteinuria, proteinuria with microscopic hematuria, and muscular fibrolipoma with a history of surgical treatment of a vascular malformation. Among the 26 patients already enlisted in the armed forces, 9 were referred for assessment of medical fitness to serve overseas. Two soldiers were assessed as fit without restrictions; one presented with a history of a single episode of deep vein thrombosis after surgery, and the other had a history of monoclonal gammopathy of renal significance without relapse and without treatment for 8 years. Four soldiers were assessed as fit only for overseas territories with sanitary structures similar to mainland France. They presented with immunoglobulin A (IgA) nephropathy and treatment with angiotensin-converting enzyme inhibitor, mevalonate kinase deficiency and treatment with anakinra, chronic idiopathic thrombocytopenic purpura, and history of unilateral partial renal infarction. The 17 other soldiers were referred for dispensation, long-sickness leave granting, or for specification toward administrative coding of their disease. Conclusions We have described the first exhaustive study of specialized fitness decisions referred to an internal medicine department. One-third of the referred patients were declared fit to serve in the armed forces. Further studies are needed to confirm these results, as our study was monocentric. Fitness decisions must take into account the disease, the treatment, and the operational field characteristics. Soldiers with systemic diseases controlled by immunosuppressive agents can serve in tropical areas if they can reach adequate sanitary structures in a short time. The knowledge of systemic diseases as well as the skillfulness of the internists, which are regularly projected to the operational fields, allows them to provide pragmatic fitness expertise to myriad complex situations.