Case for 2014 Dermpedia Hematopathology Conference: Large Cell Lymphoma: What type?

    46 year old Asian-American man with a history of stable CLL presented with nasal mass.

     

    A biopsy was performed.
    This case presented a problem of whether the tumor represents diffuse large B cell lymphoma or Richter's transformation of the patient's known CLL?
    What do you think?

    Conference: