异常细胞主要分布在淋巴窦内、细胞大、有间变大细胞。

诊断考虑：
1）大细胞间变性淋巴瘤，免疫表型可以是T细胞-ALCL；或B细胞-DLBCL，NOS， 间变型。
2）转移性肿瘤 差分化癌或恶性黑色素瘤等。

 Any Immunohistochemical stains were performed? I agree Dr. Jin's suggestion. You need do Pan-CK, CD15, CD30, T- and B-cells markers.
Another possibility is Kikuchi’s disease.  Although it is more common in young woman, male patient with this age has been reported before. In kikuchi's disease, these large cells are CD3+. CD8+ cells are more than CD4+ cells, and many T-cells may be CD5 negative.