From Libre Pathology
The lymph node has an abnormal nodular architecture, and consists of small cleaved (lymphoid) cells, that extend into the surrounding adipose tissue. The lymph node lesion stains as follows: POSITIVE: CD20, BCL2 (strong, present in germinal centres), CD10 (very rare, weak), BCL6 (scattered, weak). NEGATIVE: CD3, CD5, cyclin D1. The findings favour a low-grade follicular lymphoma (grade 1 of 3); however, the weak CD10 staining is unusual. Correlation with flow cytometry is suggested.