Solved by a verified expert :Lupus erythematosusMrs. Sanders has a history of intermittent pleuritic chest
pain and joint pain for several years. No specific cause could be identified
until recently, when blood tests indicates systemic lupus erythematosus. At the
time, protein was found in the urine and an eyrthematous rash was apparent on
her face.QUESTIONS:1. What are some possible reasons for the delay in
diagnosis?2. How did the blood tests confirm the diagnosis?3. What is the rationale for signs and symptoms?
4. What is her prognosis?