The tumor cells are arranged in Zellballen pattern and have clear to finely granular cytoplasm (A, x 100; B, x 400). Gamna-Gandy bodies are present (C, x 400, arrows). Abundant pigment granules are visible within the tumor cells (D, x 400). Note the coarse hemosiderin deposition (asterisks) and the finely granular pigment in the cytoplasm (arrows).
Zhao et al. Diagnostic Pathology 2012 7:77 doi:10.1186/1746-1596-7-77