B-Cell Lymphoma with a Folliuclar Immunophenotype Involving the Skin: Primary Cutaneous Follicle Center Lymphoma vs Large Follicular Lymphoma

Lessons From the Friday Unknowns

Histologic sections show fragments of skin and deep dermis involved by lymphoma. The lymphoma has a follicular pattern and is composed predominantly of cleaved and non-cleaved centroblasts, with scattered small centrocytes in the background. No epidermotropism seen.