Abrar-Ahmad Zulfiqar, Assia El Adli, Jean Doucet, Nadir Kadri and Emmanuel Andres
B12 hypervitaminemia is a biological abnormality, yet one that is significantly underestimated. According to the literature, high levels of vitamin B12 is associated or linked with a range of conditions, the majority of which are serious. These conditions include solid neoplasia (whether metastatic or otherwise) and, either acute or chronic, malignant haematological disorders. But there are others causes like liver disorders, which are described in the literature, but poorly known.