<prompt> Rosenthal fibres are -Intranuclear inclusionsIntracytoplasmic inclusionsPresent extracellularlyPart of cell membrane  <response>: Rosenthal fibers are beaded, elongated, or corkscrew-shaped intracytoplasmic inclusions measuring approximately 10-40 cm in diameter.They are identified occasionally in astrocytes associated with intense fibrillary gliosis.These have been described in reactive tissue such as the highly gliotic tissue surrounding cysts and vascular malformations, in neoplasms such as juvenile pilocytic astrocytomas, and Alexander disease. 