case_images: PMC11794449_01
case_images: Microscopic findings (A-B): HE X 10: A papillary thyroid carcinoma metastasis into a lymph node involved with a small lymphocytic lympha extending beyond the adipose tissue; (C): HE X 20: Papillary and follicule structure lined with cells showing papillary nuclear atypia; (D): HE X 20: Diffuse small cell lymphoma proliferation.
case_images: rjaf038f1.jpg
case_images: PMC11794449_01_rjaf038f1.jpg
case_images: f1
case_images: Microscopic examination revealed lymph node involvement by PTC developed on a lymphomatous background (Fig. 1).
case_images: Immunohistochemistry findings. (A) Diffuse and strong membranous staining of lymphomatous cells for CD20; (B) diffuse and strong membranous staining of lymphomatous cells for CD5; (C) diffuse and strong membranous staining of lymphomatous cells for CD23.
case_images: rjaf038f2.jpg
case_images: PMC11794449_01_rjaf038f2.jpg
case_images: f2
case_images: The immunohistochemistry analysis showed diffuse and positive staining of the lymphomatous background for CD20, CD23, and CD5 which was consistent with SLL (Fig. 2).