In the present study, immunophenotyping showed the intermediate- to large-sized cells to be of T cell origin with strongly CD3 (Fig. 3A) and CD8 (Fig. 3B) positive; CD5 was positive in scattered cells within the tumor (Fig. 2C) and focally positive cells for CD30 biomarker (Fig. 3E) were observed. The gene discussed is CD5; the disease is neoplasm.