case_images: PMC7543102_01
case_images: PMC7543102_02
case_images: PMC7543102_03
case_images: Collision of tumors in a lymph node.. Immunostain for S100 protein, magnification 200x. Chronic lymphocytic
  leukemia lymphocytes (center) and S100-positive melanocytes, both
  conglomerates and single cells (upper left and lower right).
case_images: 10.1177_1758835920962369-fig1.jpg
case_images: PMC7543102_03_10.1177_1758835920962369-fig1.jpg
case_images: fig1-1758835920962369
case_images: The histologic evaluation of dissected sentinel lymph node revealed collapse of the lymph-node architecture due to the presence of two distinct malignant cell populations, one with immunophenotypic characteristics compatible with small lymphocytic lymphoma (SLL) and one consisting of middle-sized cells with enlarged nuclei and a prominent eosinophilic nucleolus (Figure 1).