A new tumor composed of cells resembling tanycytes has recently been described in the pathology literature (1,2). Tihan et al. in 1999 described a series of patients with neoplasms having a distinctive monomorphous pilomyxoid histological pattern (1). The majority of these neoplasms were located in the hypothalamic-chiasmatic region and were similar histologically to an astrocytoma but behaved more aggressively with a higher rate of recurrence.

Demographics