Table 2: Risk factors and causes of CSVT.

(1) General

 (a) Dehydration
 (b) Infection
 (c) Fever
 (d) Hypoxic-ischemic injury
 (e) Post lumbar puncture

(2) Head and neck infections

 (a) Otitis media and mastoiditis
 (b) Meningitis
 (c) Sinusitis
 (d) Upper respiratory tract infection

(3) Other head and neck disorders

 (a) Head injury
 (b) Post intracranial surgery
 (c) Hydrocephalus (±ventriculoperitoneal shunt)

(4) Anemia

 (a) Iron deficiency
 (b) Sickle cell disease
 (c) Thalassemia
 (d) Autoimmune hemolytic anemia
 (e) Paroxysmal nocturnal hemoglobinuria

(5) Autoimmune disorders

 (a) Behçet disease
 (b) Systemic lupus erythematosus
 (c) Antiphospholipid antibody syndrome
 (d) Inflammatory bowel disease (ulcerative colitis, Crohn disease)
 (e) Thyrotoxicosis
 (f) Cushing syndrome
 (g) Idiopathic thrombocytopenic purpura

(6) Malignancy

 (a) Leukemia
 (b) Lymphoma
 (c) Central nervous system tumors

(7) Cardiac disease

 (a) Cyanotic congenital heart disease
 (b) Post-operative
 (c) Postcatheterization

(8) Renal disease

 (a) Nephrotic syndrome
 (b) Hemolytic-uremic syndrome

(9) Drugs

 (a) L-Asparaginase
 (b) Oral contraceptives
 (c) Corticosteroids
 (d) Epoetin-α

(10) Chromosomal disorders

 (a) Down syndrome

(11) Metabolic conditions

 (a) Diabetic ketoacidosis
 (b) Homocystinuria