Hyperthyroidism under 2 years of age.
D000367:Age Factors; D001835:Body Weight; D005500:Follow-Up Studies; D006128:Growth; D006130:Growth Disorders / Q000175:diagnosis; D006801:Humans; D006980:Hyperthyroidism / Q000175:diagnosis*; D007223:Infant; D008297:Male; D013960:Thyroid Function Tests