Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2021 Apr 29:13:11-13.
doi: 10.1016/j.jdcr.2021.04.024. eCollection 2021 Jul.

A unique collision mimicking nodular melanoma

Astrid Herzum  1 , Mattia Fabio Molle  1 , Pietro Paolo Tavilla  1 , Francesco Cabiddu  2 , Aurora Parodi  1
Affiliations

A unique collision mimicking nodular melanoma

Astrid Herzum et al. JAAD Case Rep. .
No abstract available

Keywords: amelanotic melanoma; collision tumor; eccrine poroma; melanoma; poroma.

PubMed Disclaimer

Conflict of interest statement

None declared.

Figures

Fig 1
Fig 1
Clinical image of a poroma: A red, firm nodule surrounded by a faint collarette, with an eccentric pigmented area at the top.
Fig 2
Fig 2
Polarized dermoscopy shows polymorphous and poorly defined vessels (stars) on a milky-red background, surrounded by whitish inverted-network-like lines and multiple ulcerations (arrows).
Fig 3
Fig 3
Histopathologic image of an eccrine poroma on the left, colliding with a dermal nevus on the right. Note the well-circumscribed dermal nodules of uniform, small, cuboidal eccrine lineage tumor cells with compact eosinophilic cytoplasm and basophilic round nuclei and the highly vascularized stroma, which is typical of eccrine poroma (Hematoxylin-eosin stain, original magnification: ×10).
See this image and copyright information in PMC

References

    1. Lallas A., Chellini P.R., Guimarães M.G. Eccrine poroma: the great dermoscopic imitator. J Eur Acad Dermatol Venereol. 2016;30(10):e61–e63. - PubMed
    1. Marchetti M.A., Marino M.L., Virmani P. Dermoscopic features and patterns of poromas: a multicentre observational case-control study conducted by the International Dermoscopy Society. J Eur Acad Dermatol Venereol. 2018;32(8):1263–1271. - PMC - PubMed

LinkOut - more resources