Fig. 2

Microscopic features. a. Lymph node structure is partially preserved, and residual lymph follicles can be seen (HE, × 40);b. The subcapsular and medullary sinuses are slightly expanded, and the sinus comprises a larger amount of histiocytes (HE, × 100);c. The cortical areas are atrophic and smaller (HE, × 40);d. A few lymphoid follicles of various sizes are observed (HE, × 40);e. Some of the follicular germinal centers are atrophic and smaller (HE, × 100);f. Lymph node paracortical areas are diffusely proliferative and enlarged,and consist mainly of histiocytes, immunoblasts, and medium-sized T lymphocytes (HE, × 400)