[Solved]: 12 years old boy complains of pain in spinal column…

12 years old boy complains of pain in spinal column and joints and general weakness. Insignificant hyperplastic syndrome is detected. Body temperature is not increased. Clinical blood test data are the following: erythrocytes – 3,2 1012/l, Hb 105 /l, thrombocytes 150109/l, leukocytes 3,2109/l, eosinocytes 0%, segmented neutrophills 14%, lymphocytes – 85%, monocytes 1%, ESR 52 mm/hour.1.Which diagnosis should be excluded first of all?2.Make a differential diagnosis.