Squamous Cell Papilloma, Skin, Mouse

  • Ryohei Hasegawa
  • Hidetaka Sato
  • Yoshifumi Miyakawa
Part of the Monographs on Pathology of Laboratory Animals book series (LABORATORY)


The tumor appears as an outgrowth from the skin surface in the form of a wart, 1–10 mm in diameter. The apical surface of the tumor can be keratinized and has either small protuberances or a cauliflower-shaped, uneven, knobby surface; fusion with adjacent papules is common. Large tumors have a dark-brown to black color due to bleeding or imbibition into the keratinized layers of dark substances (Fig.26). The surrounding skin is even and mobile in relation to the under­lying tissues (Bogovsky 1979).


Epidermoid papilloma fibroepithelioma fibroepithelial papilloma sessile papilloma 


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© Springer-Verlag Berlin Heidelberg 1989

Authors and Affiliations

  • Ryohei Hasegawa
  • Hidetaka Sato
  • Yoshifumi Miyakawa

There are no affiliations available

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