on (Jun 22, 2025) in the presence of the head of Medical lab Management unite and Lab Assistants a symposium entitled ( D-Dimer Testing), was presented by (Mr.Diyar Sabah Salih)  , Where it has been explained About D-dimer is a fibrin degradation product commonly used in clinical settings to help rule out thrombotic conditions such as deep vein thrombosis (DVT) and pulmonary embolism (PE). It plays a critical role in identifying abnormal clot formation and fibrinolysis. Although D-dimer testing is highly sensitive, it lacks specificity, as elevated levels may also occur in conditions such as infection, inflammation, pregnancy, and malignancy. Therefore, it is most useful when combined with clinical assessment tools. Understanding D-dimer and its role in the coagulation process is essential for medical laboratory assistants, especially in interpreting results and assisting in diagnostic workflows,  and At the end of Symposium In conclusion, D-dimer is a valuable diagnostic marker for detecting abnormal clotting activity, particularly when used alongside clinical risk assessments. Its high sensitivity makes it a useful tool in excluding thromboembolic events, but its limited specificity requires cautious interpretation. Medical laboratory assistants play a crucial role in the accurate handling, analysis, and reporting of D-dimer tests, thereby contributing significantly to the diagnostic process and patient care.