Testis and epididymis
Other tumors not specific to testis

Author: Jennifer Gordetsky, M.D. (see Authors page)

Revised: 19 July 2017, last major update March 2014

Copyright: (c) 2002-2017, PathologyOutlines.com, Inc.

PubMed Search: Testis plasmacytoma

Cite this page: Plasmacytoma. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/testisplasmacytoma.html. Accessed October 16th, 2018.
Definition / general
  • Testicular involvement by plasma cell neoplasia
Clinical features
Radiology images

Images hosted on other servers:

Ultrasonography - enlarged right testicle

Two pelvic masses

Case reports
Gross description
  • Firm to soft, tan, golden brown or grey white
  • May be large and replace most of testicular parenchyma
  • May be extensively hemorrhagic
Gross images

Images hosted on other servers:

Mutinodular fleshy tumor

Microscopic (histologic) description
  • Central effacement of tubules by atypical plasma cells (bi or multinucleated)
  • Tubules often spared at periphery
  • Anaplastic cells may obliterate parenchyma or invade between seminiferous or epididymal tubules
  • Tumor cells can look like typical plasma cells or be deceptive with vesicular nuclei and large central nucleoli
Microscopic (histologic) images

Images hosted on other servers:

Interstitial growth
pattern with
preservation of
seminiferous tubules

Positive for plasma cell marker

Cytology images

Images hosted on other servers:

Diff-Quik stained touch prep: numerous plasma cells

Positive stains
Negative stains
Additional references