Clinical observation of pediatric-type follicular lymphomas in adult: Two case reports

Figure 1 Pathological characteristics. A: This pediatric-type follicular lymphoma displayed the "starry sky phenomenon” in case 1, seen on hematoxylin and eosin stain at 100× magnification; B: At 400× magnification in case 2, the follicle is mainly composed of a single medium-sized central cell, with scattered chromatin and inconspicuous nucleoli. The histological grade was by following per under the grade 3 standard of follicular lymphoma; C and D: tumor cells in case 1 expressed CD10 and BCL6 at 100× magnification; E: BCL2 was negative in case 2 at 100× magnification; F: Ki-67 was highly expressed in germinal center (positive index showed 90%) in case 2 at 100× magnification.