Thyroid disease in systemic lupus erythematosus and rheumatoid arthritis

SIR, We determined the degree of overlap between autoimmunethyroid disease and two non-organ-specific autoimmune diseases,systemic lupus erythematosus (SLE) and rheumatoid arthritis(RA). Both SLE and RA are commonly encountered in our out-patientpractice and were chosen because of their clinical relevance. Sixty-nine SLE and 64 RA patients fulfilling the American RheumatismAssociation criteria for SLE [1] and RA [2] were selected forthis study. Patients from both groups were found