Anti ds DNA antibiodies are commonly seen in: (A) SLE, (B) Scleroderma, (C) Dermatomyositis, (D) Rheumatoid ahritis
Answer is A. Antibiodies to do DNA and the so called Smith antigens are viually diagnostic of SLE .Anti ds-,DNA is common in SLE (40-60%,) ref Robbins 9/e p 128