68yrs old male with retroperitoneal core biopsy.  
CLINICALLY: Back pain and walking disabilities. Sonoscopically: retroperitoneal tumor. The patient los for foolow up and does not reach hemato dept after diagnosis.  
HISTO: On the slides.  
PHOTOS: from Apperio virtual slides taken.  
IH: CD138(+++) 100%, Mum1(+++)100%, Ig lambda(++)100%, CD4(+/++) 80%, EBV (EBER)(-), Pax5(-), CyclinD1(-), CD79a(-), CD20(-), Ki67 100% (+++), CD3(-), Ig kappa(-), Bcl2(-), CD10(-), Bcl6(-), ALK1(-), CD30(-).  
QUALITY: small biopsy: a lot of overstaining and marginal artefacts: CD38/ Ig/ etc. Appologies.  
 
PROPOSAL: B plasmablastic DLBCL.  
 
Thankyouforbeeing2gether.