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Uptodate Reference Title
Retinoblastoma pathology
Retinoblastoma pathology
Pathology of well-differentiated retinoblastoma showing Flexner-Wintersteiner rosettes. The tumor cells that form the Flexner-Wintersteiner rosette surround a central lumen containing small cytoplasmic extensions of the encircling cells; the central lumen is devoid of fiber-rich neuropil.