Clinicohematological Study of Thrombocytosis in Children

Abstract

Introduction. Primary thrombocytosis is very rare in children; reactive thrombocytosis is frequently observed in children with infections, anemia, and many other causes. Aims and Objectives. To identify the etiology of thrombocytosis in children and to analyze platelet indices (MPV, PDW, and PCT) in children with thrombocytosis. Study Design. A prospective observational study. Material and Methods. A total of 1000 patients with thrombocytosis (platelet > 400 × 109/L) were studied over a period of 2 years. Platelet distribution width (PDW), mean platelet volume (MPV), and plateletcrit (PCT) were noted. Results. Of 1000 patients, 99.8% had secondary thrombocytosis and only two children had primary thrombocytosis (chronic myeloid leukemia and acute myelogenous leukemia, M7). The majority of the children belonged to the age group of 1month to 2 years (39.7%) and male to female ratio was 1.6 : 1. Infection with anemia (48.3%) was the most common cause of secondary thrombocytosis followed by iron deficiency alone (17.2%) and infection alone (16.2%). Respiratory infection (28.3%) was the predominant infectious cause observed. Thrombocytosis was commonly associated with IDA among all causes of anemia and severity of thrombocytosis increased with severity of anemia (P = 0.021). With increasing platelet count, there was a decrease in MPV (<0.001). Platelet count and mean PDW among children with infection and anemia were significantly higher than those among children with infection alone and anemia alone. None were observed to have thromboembolic manifestations. Conclusions. Primary thrombocytosis is extremely rare in children than secondary thrombocytosis. Infections in association with anemia are most commonly associated with reactive thrombocytosis and severity of thrombocytosis increases with severity of anemia.

Thrombocytosis in Under-Five Children with Lower Respiratory Tract Infection

“…Ozcan described upper respiratory tract infection as the most common cause of reactive thrombocytosis followed by pneumonia (4). Subramaniam et al, indicated that respiratory infection was the predominant (28.3%) infectious cause of reactive thrombocytosis (5). Hadidopulou found reactive thrombocytosis in children with viral respiratory tract infection (6).…”

Association between secondary thrombocytosis and viral respiratory tract infections in children

“…The potential underlying causes include acute bacterial or viral infections, tissue damage, cancer and chronic inflammation, particularly during early life 2 3 . The most frequent cause of ST is respiratory tract infections (RTIs) in childhood; RTIs account for 60–80% of ST cases 4 5 6 . However, reports of thrombocytosis induced by viral infections are scarce, particularly in children.…”

Altered Hematological and Biochemical Parameters in Schoolchildren Living in an Agricultural Community of Merida State, Venezuela

“…Iron deficiency is most commonly associated with thrombocytosis [57,58]. Elevated platelet counts, especially in the setting of iron deficiency, can lead to an increased thromboembolic risk, with clinical consequences especially in patients with inflammatory bowel disease, chronic kidney disease or cancer [59].…”