<prompt> Onion peel appearance of splenic capsule is seen inSLESclerodermaRheumatoid ahritisSjogerns syndrome  <response>: Ref Robbins 9e p224 In splenic involvement in SLE _splenomegaly, capsular thickeing , follicular hyperplasia,are common feature . central penicilliary aeries may show concerntric intimal and smooth muscle cell hyperplasia , producing onion skin appearance 