Trepanobiopsy biopsy of the part of the bone marrow with spongy bone and bone marrow for histological analysis taking from the wing of ilium http://zdravi.e15.cz/clanek/priloha-lekarske-listy/diferencialni-diagnostika-pancytopenie-449915 http://portal.med.muni.cz/clanek-22-postup- pri-provadeni-trepanobiopsie.html