Recurrent Primary Intrasellar Paraganglioma

Figure 4

Strong immunoreactivity in principal cells for synaptophysin (a), chromogranin (c), CD56 (d), and neuron-specific enolase (e). Sustentacular cells with strong immunoreactivity for S-100 protein (b). Focally, the tumor cells were also positive for AE1/AE3 (cytokeratin) (f); figures a–f, 200x.

(a)

(b)

(c)

(d)

(e)

(f)