Coagulation Profile at Diagnosis in Patients with Acute Lymphoblastic Leukemia.
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.
Department of Pathology, Lady Hardinge Medical College and Associated Kalawati Saran Children's Hospital, New Delhi, 110001, India. shivalisehgal@gmail.com.
Shivali
S
Sehgal
Department of Pathology, Lady Hardinge Medical College and Associated Kalawati Saran Children's Hospital, New Delhi, 110001, India.
Sunita
S
Sharma
Department of Pediatrics, Lady Hardinge Medical College and Associated Kalawati Saran Children's Hospital, New Delhi, 110001, India.
Jagdish
J
Chandra
Department of Pathology, Lady Hardinge Medical College and Associated Kalawati Saran Children's Hospital, New Delhi, 110001, India.
Anita
A
Nangia
D000293:Adolescent; D001777:Blood Coagulation; D001780:Blood Coagulation Tests; D002648:Child; D002675:Child, Preschool; D005260:Female; D005338:Fibrin Fibrinogen Degradation Products; D005342:Fibrinolysis; D006801:Humans; D007223:Infant; D054198:Precursor Cell Lymphoblastic Leukemia-Lymphoma / Q000175:diagnosis*
D005338:Fibrin Fibrinogen Degradation Products; C036309:fibrin fragment D
Acute lymphoblastic leukemia; Coagulation profile; Pediatric