This kid has signs and sx of dehydration Hyaline casts due to hypovolemia resulting in concentrated urine

• Hyaline casts are the most common type of urinary cast and are often seen in setting of dehydration or vigorous exercise; they can be seen in healthy individuals
• Erythrocyte casts = RBC casts = Glomerulonephritis (such as post-strep glomerulonephritis)
• Leukocyte casts = WBC casts = Pyelonephritis and acute interstitial nephritis