case_images: PMC3513813_01
case_images: (a) The growth over the left tonsil. (b) CT scan shows the growth on the left tonsil
case_images: NJMS-3-62-g001.jpg
case_images: PMC3513813_01_NJMS-3-62-g001.jpg
case_images: F1
case_images: Intraoral examination revealed a red swelling over the left tonsil [Figure 1a]. Tomography (CT) scan showed a growth arising from the left tonsil [Figure 1b].
case_images: (a) Photomicrograph showing a tumor situated underneath the squamous epithelial lining and lymphoid follicles of the tonsil. (Hematoxylin and Eosin, x100). (b) Photomicrograph showing continuous sheet of spindle-shaped tumor cells with elongated plump-shaped nuclei arranged in fascicles and storiform pattern with distinct whorling with 360 degree rotation of the tumor cells [Black bordered box] and multinucleated giant cells. [Inset] (Hematoxylin and Eosin, x400)
case_images: NJMS-3-62-g002.jpg
case_images: PMC3513813_01_NJMS-3-62-g002.jpg
case_images: F2
case_images: Microscopical examination revealed a tumor situated underneath the squamous epithelial lining and lymphoid follicles of the tonsil [Figure 2a]. The tumor was composed of continuous sheets of spindle cells with elongated plump-shaped nuclei arranged in fascicles and in storiform pattern [Figure 2b]. Most strikingly, there were frequent distinct whorling of the tumor cells with 360 degree rotation [Figure 2b (Black bordered box)]. Occasional multinucleated giant cells [Figure 2b (Inset)] and mitotic figures were also noted along with evidence of lymphocytic infiltration.
case_images: (a) Tumor cells showing strong membrane positivity for CD21. The 360 degree whorling pattern can be easily appreciated. (b) Tumor cells showing strong membrane positivity for CD3
case_images: NJMS-3-62-g003.jpg
case_images: PMC3513813_01_NJMS-3-62-g003.jpg
case_images: F3
case_images: CD21 [Figure 3a], CD35 [Figure 3b] and CD23.