The hydrograph above depicts river discharge before, during…

The hydrograph above depicts river discharge before, during and after a precipitation event under two different conditions (or areas).  What does (A) represent, and what does (B) represent? Explain what causes the difference in discharge between A and B.

A 10-month-old male is brought to the clinic by his mother….

A 10-month-old male is brought to the clinic by his mother. She reports that he has been crying continuously and intermittently draws his knees up to his chest. On exam, you note a sausage-shaped mass in the right lower quadrant. His diaper contains stool mixed with blood and mucus. What is the most likely primary diagnosis?