[Eosinophilia: from neoplastic disease to anguillulosis]. / Eosinophilie: de la néoplasie à l'anguillulose.

Hypereosinophilia (HE), defined as eosinophil count above 0.5 G/l in the peripheral blood. Most cases are secondary to other diseases. Etiological diagnosis remains complex especially as causes of HE vary across the population. Allergic diseases and parasitic infections are the predominant causes. However up to 10% of HE are secondary to tumors. Here, we describe a case of HE initially attributed to a breast cancer that turn out to be due to an angillulosis acquired just before the diagnosis of the tumor.

[Hyperlactataemia : not only useful in circulatory shock]. / L'hyperlactatémie: pas seulement utile en cas de choc circulatoire.

Hyperlactataemia, a marker of poor prognosis in intensive care patients, is most frequently found in cases of acute circulatory failure ; however, it may be due to factors other than cellular hypoxia. The level of blood lactate is determined by the balance between its production and its elimination, which can be influenced by various factors. For example, the influence of medication on blood lactate levels should not be underestimated, whether in anaesthesiology, with the use of propofol, or with certain anti-retrovirals in HIV seropositive patients. And in oncology, blood lactate can derive from anaerobic metabolism, characteristic of tumour cells. The differential diagnosis of hyperlactataemia can, therefore, sometimes be more complex than initially thought.