Soft tissue
Peripheral nerve
Other benign

Topic Completed: 1 November 2012

Minor changes: 9 September 2020

Copyright: 2002-2020,, Inc.

PubMed Search: Ancient schwannoma [title]

Vijay Shankar, M.D.
Page views in 2019: 4,909
Page views in 2020 to date: 4,298
Cite this page: Shankar V. Schwannoma-ancient. website. Accessed November 30th, 2020.
Definition / general
  • Degenerative change to tumors, usually large and of long duration, deep within retroperitoneum
  • Cyst formation, calcification, hemorrhage (stromal hemosiderin), hyalinization, histiocytic infiltration, severe nuclear atypia (nuclear hyperchromasia, irregular nuclear shapes)
  • No mitotic figures
Case reports
Gross images

Case #334

Well circumscribed tumor

Cut section with variegated appearance,
cystic areas, hemorrhage and calcification

Microscopic (histologic) images

Contributed by Mark R. Wick, M.D.

Ancient change

Case #334

Encapsulated mass with calcification

Hypercellular and hypocellular areas

Myxoid change

Hyalinized blood vessels

Enlogated cells with cigar shaped nuclei

Hypercellular areas with palisading

Hyalinized blood vessels

Cystic areas

Cystic areas and blood vessels

Areas of ossification


Images hosted on other servers:

Hypopharyngeal tumor

Thigh mass mimicking malignancy

Abdominal wall mass

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