16mth old male has platelet count of 509. are there any serious issues this could be related to? all other counts were normal except mch was 22.4.

Pediatric hemedoc: follow up may be needed if the mild increased platelets is persistent, unexplained or symptomatic. The MCH is near lower limit of normal, about 23-24 in this age group. A word of caution, lab values are never complete, unchanging or diagnostic without the context of the whole, so see a pediatrician or a specialist for a steady analysis and discovery of issues. Most issues in this age are reactive.