myxoid neurothekeoma

Definition: The myxoid subtype of neurothekeoma ( or nerve sheath myxoma ) is characterized by a lobulated, nonencapsulated but well-circumscribed proliferation of spindled and epithelioid cells in varying proportions.

The cells are embedded within a myxoid stroma. Nests are separated by varying amounts of collagen.

Due to the large amount of myxoid stroma separating the cells, the tumor cells are said to display a random growth pattern.

The histologic features of myxoid neurothekeoma are distinguishing enough that its diagnosis is usually not problematic.

The myxoid neurothekeoma displays a lobulated, nonencapsulated but well-circumscribed proliferation of spindled and epithelioid cells embedded within a myxoid stroma.

See also

 myxoid tumors

• myxomas

 neurothekeoma