Which among the following is not an autoimmune disease?: (A) Myasthenia gravis, (B) Systemic lupus erythematosus, (C) Graves disease, (D) Sickle cell disease
Answer is D. Ans. (d) Sickle cell diseaseRef: Robbin's pathology 9th ed. /211-15, 635* Sickle cell disease is a genetic condition which is characterized by mutation in beta globin chain of hemoglobin (glutamic acid is replaced with valine in the 6th position of beta chain).* Other given choices like SLE, Graves and MG are all autoimmune conditions.