Rosenthal fiber

Ro·sen·thal fi·ber

an oval or elongated eosinophilic mass believed to represent a modified process of an astrocyte; seen in large numbers in certain slowly growing astrocytomas and areas of chronic reactive gliosis.

Rosenthal fiber

irregularly shaped, hyaline, eosinophilic structures formed within astrocytes; a feature of Alexander's disease of dogs.
References in periodicals archive ?
No eosinophilic granular bodies, Rosenthal fibers, or Herring bodies were identified within the tumors.
No Verocay bodies, thick-walled blood vessels, Rosenthal fibers, granular bodies, calcifications, or psammoma bodies were present.
In contrast with pilocytic astrocytomas, pituicytomas lack Rosenthal fibers, granular bodies, and biphasic morphologic structure.