Plasmacytoma

This figure illustrates two variants of plasmacytoma. The tumor on the left is the plasmacytic variant, showing collection of mature-looking plasma cells with eccentric round nuclei, condensed, coarsely clumped "clock-face" chromatin, basophilic cytoplasm, and a prominent, pale Golgi zone. The tumor on the right is the plasmablastic variant, with cells showing striking variation in size. Their blastic nature is apparent from the coarsely clumped chromatin and basophilic cytoplasm.