<prompt> A15 year old boy presented with pancarditis, on myocardial biopsy, following finding was seen. Diagnosis?Aschoff noduleTBFB giant cellsNone  <response>: Ans. a Aschoff noduleHere one can see collection of foci of swollen eosinophilic collagen surrounded by: Lymphocytes primary T cells, Occasional plasma cells, Aschoff giant cells Q macrophages of rheumatic fever Q and Antischkow cells cells with caterpillar like chromatin marked with an arrow 