This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hemorrhagic and Thrombotic Diseases, Subject name: Pediatrics
HSP doesn't cause - 
Select and explain. 
A. Hemoptysis, B. Purpurae, C. Arthritis, D. Abdominal pain
A: Hemoptysis
Answer: A: Hemoptysis 
Explanation: Ans. is 'a' i.e., HemoptysisHenoch-Schonlein purpurao Henoch - Schonlein purpura is vasculitis of small vessels (capillaries, venule or arterioles) and characterized by deposition of IgA in the wall of involved vessels.o H.S. purpura is characterized by tetrad of purpura, arthritis, glomerulonephritis, and abdominal pain. Gross hematuria is seen in 20-30% of cases.o All changes result from the deposition of circulating immune complexes, containing IgA and complement on the endothelium of the blood vessels throughout the body and within the glomerular mesangial regionso Diagnosis is confirmed by presence of palpable purpura with normal platelet count along with one or more of the following : abdominal pain, arthralgia/arthritis and mesangial deposition of IgA.o Renal manifestations usually start at the onset or within 3 months of onset of other symptoms.