This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
A four-year-old child presents with mild fever, malaise, purpura, arthritis, abdominal pain and microscopic hematuria. What would be the most likely diagnosis 
Select and explain. 
A. Thrombasthenia, B. Idiopathic thrombocytopenic, C. Systemic Lupus Erythematosus, D. Henoch-Schonlein purpura
D: Henoch-Schonlein purpura
Answer: D: Henoch-Schonlein purpura 
Explanation: Henoch-Schönlein purpura affects the small blood vessels of the skin, joints, intestines and kidneys. It's most common before the age of seven but can affect anyone.
Symptoms include reddish-purple spots on the lower extremities, swollen and sore joints, abdominal pain or bloody urine.
The condition is often treated with steroids