Comparison of diagnoses based on conventional histology with diagnoses established after additional immunohistologic review of the submitted cases.

LPHD indicates lymphocyte predominance Hodgkin disease; CHD, classical Hodgkin disease; NS, nodular sclerosis, MC, mixed cellularity; NHL, non-Hodgkin lymphoma; LRCH,  lymphocyte rich classical HD; N, nodular; D, diffuse; IF, interfollicular.