I like the diagnosis of KiKuchi very much - but we have to consider several points: male sex and generalized lymphadenopathy is not typical( although not exclusive). The MPO reaction is very strong- is it really just the macrophages or are there also granulocytes( I got in the CD 15 stain the impression that there are also some granulocytes in the necrosis)?Proliferating cells in Kikuchi are mainly CD8 cells ( this should be shown , whereas HD has a background od CD4+ cells) LMP1 stain may also be helpful to exclude HD like cells in an acute Mononucleosis which , in my view , is the most important differential diagnosis , since cortical necrosis is a typical feature in that disease( and it would help , at least in aq formal way to deal with these unusual CD30 / CD15 double positive cells. There are still some questions open - please look for the answers.

Thank you Prof.Mueller-Hermelink for urgent comment. Some pictures are placed in. EBV LMP1 (-). The paracortical CD30+ cells seems to be CD30+ only. I've requested some DOUBLE stains for better visualisation. CD4/CD8 ratio is 1/2, so T populations seems to be mixed.

I am convinced- This is really Kikuchi Lymphadenitis. An interesting and nice case !

Thank a lot for your comments. Double CD4/CD8 and CD3/CD30 stain once more reveal admixture of CD4 and CD8+ cells and some CD30+ cells mainly "mononuclear". The phots are not added due to insufficient quality.

FINAL DIAGNOSIS was issued: NECROTIC LYMPHADENOPATHY: KIKUCHI DISEASE. The 1 problem left: the pulmonary infiltrate was detected, but still I have any data about origin of it.  
A lot of thanks to Prof.Mueller-Hermelink and Prof.N.Hurwitz for continuing support and consulting.