Proteomic and Clinicopathologic Assessment of Penile Amyloidosis: A Single Institutional Review of 12 Cases

Burak Tekin, Sarwat I. Gilani, Surendra Dasari, Jason D. Theis, Karen L. Rech, Linda N. Dao, Antonio L. Cubilla, Loren P. Herrera Hernandez, Rafael E. Jimenez, John C. Cheville, Angela Dispenzieri, Matthew T. Howard, Ellen D. Mcphail, Lori A. Erickson, Ruifeng Guo, Sounak Gupta

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Objectives: There is a paucity of data on penile amyloidosis. We aimed to assess the frequency of different amyloid types in surgical specimens from the penis involved by amyloidosis and correlate relevant clinicopathologic parameters with proteomic findings. Methods: Since 2008, our reference laboratory has performed liquid chromatography/tandem mass spectrometry (LC-MS/MS) for amyloid typing. The institutional pathology archive and reference laboratory database were queried to retrospectively identify all penile surgical pathology specimens with LC-MS/MS results between January 1, 2008, and November 23, 2022. Archived H&E-stained and Congo red-stained sections were re-reviewed. Results: Twelve cases of penile amyloidosis were identified, which represented 0.35% (n = 3,456) of penile surgical specimens. AL-type amyloid was most frequent (n = 7), followed by keratin-type amyloid (n = 3) and ATTR (transthyretin)-type amyloid (n = 2). AL-type amyloid cases often showed diffuse dermal/lamina propria deposition, whereas all keratin-type amyloid cases were localized to the superficial dermis. Two cases with keratin-type amyloid had concomitant cutaneous findings (penile intraepithelial neoplasia and condyloma). Conclusions: This series, the largest to date, demonstrates that penile amyloidosis has a heterogeneous proteomic landscape. To the best of our knowledge, this is the first study describing ATTR (transthyretin)-type penile amyloid.

Original languageEnglish (US)
Pages (from-to)303-313
Number of pages11
JournalAmerican journal of clinical pathology
Volume160
Issue number3
DOIs
StatePublished - Sep 1 2023
Externally publishedYes

Keywords

  • Amyloid
  • Mass spectrometry
  • Penis
  • Proteomics

ASJC Scopus subject areas

  • Pathology and Forensic Medicine

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