{'fraction_non_alphanumeric': 0.02318840579710145, 'fraction_numerical': 0.005072463768115942, 'mean_word_length': 5.423255813953489, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Ultrastructural pathology in man. French contributions

In hematology to start with, the personality of Marcel Bessis stands in the fore. He and his group, especially Janine Breton-Gorius and Jean-Paul Thiery started studying both normal and pathological blood cells very early, from 1950 onwards, and he is well known for his pioneering work on leukemic cells. They first recognized the presence of iron in mitochondria of erythroblasts (sideroblasts) in patients with Cooley's anemia, in experimental animals and to a lesser extent, in normal subjects. The deformability of some pathological blood cells, red blood cells in particular, gave superb pictures with the scanning electron microscope. With the transmission electron microscope they contributed to the understanding of some abnormalities of blood cells, including pathological thrombocytes and granulocytes as for instance, in Chediak Higachi's disease or in enzymopathies resulting in abnormal granule formation. The concept of the 'erythroblastic island' and the pathology of this fundamental unit of erythropoiesis, represent also important contributions of Marcel Bessis and his team. The results of all these observations have been collected in a well known treatise [9]. Marcel Bessis also edited a very useful small book [10] in which old pictures were reexamined and analysed in the light of modern techniques.