Question

A 3-year-old girl presents with a palpable purpuric rash over her buttocks and legs, colicky abdominal pain and arthralgia of both knees. She is afebrile and systemically well. What is the most important initial investigation?

Accepted Answer

Urinalysis for blood and protein

Answer

CT abdomen

Answer

Serum amylase

Answer

ANA and rheumatoid factor

Answer

Plasma lactate

Practice question

A 3-year-old girl presents with a palpable purpuric rash over her buttocks and legs, colicky abdominal pain and arthralgia of both knees. She is afebrile and systemically well. What is the most important initial investigation?