Shivali Sehgal1, Sunita Sharma2, Jagdish Chandra3, Anita Nangia2. 1. Department of Pathology, Lady Hardinge Medical College and Associated Kalawati Saran Children's Hospital, New Delhi, 110001, India. shivalisehgal@gmail.com. 2. Department of Pathology, Lady Hardinge Medical College and Associated Kalawati Saran Children's Hospital, New Delhi, 110001, India. 3. Department of Pediatrics, Lady Hardinge Medical College and Associated Kalawati Saran Children's Hospital, New Delhi, 110001, India.
Abstract
OBJECTIVE: To evaluate the coagulation parameters at the time of diagnosis in pediatric acute lymphoblastic leukemia (ALL) patients. METHODS: A total of 65 newly diagnosed ALL patients upto 18 y of age along with 30 age and sex matched controls were included in the study. Coagulation tests including Prothrombin Time (PT), Activated Partial Thromboplastin Time (APTT), Fibrinogen (FBG) assay, D-dimer (D-DI) assay, Coagulation inhibitor levels and tests for fibrinolysis were performed. RESULTS: At baseline, APTT of the patients was significantly prolonged (p 0.033), but PT and fibrinogen were comparable in the two groups. Protein C (PC) and Protein S (PS) were both significantly reduced in the cases, while antithrombin was comparable to control values (p < 0.001, p < 0.001 & p = 0.828 respectively). Tissue plasminogen activator levels (tPA) were significantly lower in the cases (p < 0.001) but Plasminogen activator inhibitor type 1 (PAI-1) values were comparable. D-DI levels were significantly high (p < 0.001). CONCLUSIONS: The onset of leukemia is associated with hemostatic derangement favouring hypercoagulability. The coagulopathy is due to thrombin activation (as evidenced by raised d-dimer). The decreased fibrinolysis (due to reduced tPA and raised PAI-1) and low levels of PC and PS contribute to the hypercoagulable state at the time of diagnosis.
OBJECTIVE: To evaluate the coagulation parameters at the time of diagnosis in pediatric acute lymphoblastic leukemia (ALL) patients. METHODS: A total of 65 newly diagnosed ALL patients upto 18 y of age along with 30 age and sex matched controls were included in the study. Coagulation tests including Prothrombin Time (PT), Activated Partial Thromboplastin Time (APTT), Fibrinogen (FBG) assay, D-dimer (D-DI) assay, Coagulation inhibitor levels and tests for fibrinolysis were performed. RESULTS: At baseline, APTT of the patients was significantly prolonged (p 0.033), but PT and fibrinogen were comparable in the two groups. Protein C (PC) and Protein S (PS) were both significantly reduced in the cases, while antithrombin was comparable to control values (p < 0.001, p < 0.001 & p = 0.828 respectively). Tissue plasminogen activator levels (tPA) were significantly lower in the cases (p < 0.001) but Plasminogen activator inhibitor type 1 (PAI-1) values were comparable. D-DI levels were significantly high (p < 0.001). CONCLUSIONS: The onset of leukemia is associated with hemostatic derangement favouring hypercoagulability. The coagulopathy is due to thrombin activation (as evidenced by raised d-dimer). The decreased fibrinolysis (due to reduced tPA and raised PAI-1) and low levels of PC and PS contribute to the hypercoagulable state at the time of diagnosis.
Authors: Paola Giordano; Angelo Claudio Molinari; Giovanni Carlo Del Vecchio; Paola Saracco; Giovanna Russo; Maria Altomare; Paolo Perutelli; Nicoletta Crescenzio; Nicola Santoro; Marina Marchetti; Domenico De Mattia; Anna Falanga Journal: Am J Hematol Date: 2010-05 Impact factor: 10.047