Skin nonmelanocytic tumors
Premalignant or noninvasive
Paget disease (extramammary)

Author: Christopher Hale, M.D. (see Authors page)

Revised: 5 September 2018, last major update June 2012

Copyright: (c) 2002-2018, PathologyOutlines.com, Inc.

PubMed Search: Paget disease [title] extramammary

Cite this page: Hale, C. Paget disease (extramammary). PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/skintumornonmelanocyticpagets.html. Accessed October 16th, 2018.
Definition / general
  • May originate from intraepidermal portion of sweat glands or primitive basal cells with ability to differentiation towards glandular elements
  • Labia majora, scrotum and perineum are most common sites
  • Due to underlying carcinoma in 10 - 20% of cases of vulvar disease
Case reports
Treatment
  • Complete surgical excision
Clinical images

Images hosted on PathOut server:

Contributed by Mark R. Wick, M.D.


Images hosted on other servers:

Red firm mass

Gross description
  • Erythematous, eczematous or ring shaped
  • Often multicentric, extensive, pigmented
Microscopic (histologic) description
  • Malignant cells in epidermis with differentiation towards local glandular structures
  • Almost always simultaneous involvement of eccrine glands or hair follicles
  • Dermal invasion is rare in vulva, more common in perianal region)
  • Single, clusters or glandular formations of large cells with pale, vacuolated cytoplasm, usually just above basal layer of epidermis
  • May have cleft-like spaces between Paget cells and neighboring keratinocytes
  • No intercellular bridges, no dyskeratosis
Microscopic (histologic) images

Images hosted on PathOut server:

Contributed by Mark R. Wick, M.D.

Breast

Vulva

Extramammary



Extramammary

Dermal invasion



GCDFP15

PAS



Images hosted on other servers:

Site unspecified

Paget cells

GCDFP-15, CK7, CK20

Positive stains
Electron microscopy description
  • Cells with glandular differentiation, not melanocytes or keratinocytes
Differential diagnosis