A 25-year-old woman has been feeling tired for the past 4 weeks. She says she \"

Question

A 25-year-old woman has been feeling tired for the past 4 weeks. She says she "aches all over" (particularly her shoulders and hips). She's also concerned with the rash on her face that gets worse after she's spent a day in the sun. Physical examination reveals only an erythematous rash. Laboratory findings include protein in the urine, normal liver enzymes and a near normal CBC. Which of the following additional laboratory tests would be most useful to perform in her case for a more definitive diagnosis?

      

A. MRI

B. Skin Biopsy

    

C. CD4 lymphocyte count

D. blood test for ANAs

E. Evoked Potenials

A. MRI

B. Skin Biopsy

    

C. CD4 lymphocyte count

D. blood test for ANAs

E. Evoked Potenials

Explanation / Answer

D. blood test for ANAs

The anti-nuclear antobody test (ANA test) is performed to detect any auto-antibodies produced in the body. The patient is suffering from an auto-immune disease, may be systemic lupus erythematosus (SLE). SLE is an autoimmune disease in which the patient experience skin rashes upon Sun exposure, joint pains and protein in urea.

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