RT Journal Article SR Electronic T1 Familial antithrombin III deficiency and Mycoplasma pneumoniae pneumonia. JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 870 OP 871 DO 10.1136/jcp.44.10.870 VO 44 IS 10 A1 M D Creagh A1 I F Roberts A1 D J Clark A1 F E Preston YR 1991 UL http://jcp.bmj.com/content/44/10/870.abstract AB A 10 year old girl presented with a massive femoral vein thrombosis associated with Mycoplasma pneumoniae pneumonia. Subsequently type I familial antithrombin III deficiency was diagnosed. It is suggested that prophylactic measures aimed at preventing thrombosis should be considered in acutely ill subjects with infection and familial thrombophilia.