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What are the symptoms of keratoacanthoma?

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You might think you have a pimple or boil at first, but keratoacanthoma can grow fast and get as big as a quarter in a couple of months.

It looks like a small, red or skin-colored volcano -- there’s a distinctive crater at the top of the lump that often has keratin, or dead skin cells, inside.

You’ll usually see keratoacanthoma on skin that’s been exposed to the sun, like your head, neck, arms, the backs of your hands, and sometimes your legs. It often starts in a hair follicle.

From: What is Keratoacanthoma? WebMD Medical Reference

SOURCES:

Journal of Investigative Dermatology : “Are Keratoacanthomas Variants of Squamous Cell Carcinomas? A Comparison of Chromosomal Aberrations by Comparative Genomic Hybridization.”

Medscape: “Keratoacanthoma.”

Cleveland Clinic Center for Continuing Education: “Nonmelanoma Skin Cancer.”

James Spencer, MD, dermatologist in private practice in St. Petersburg, FL, and clinical professor of dermatology at Mount Sinai School of Medicine.

Skin Cancer Foundation: “Squamous Cell Carcinoma.”

American Academy of Dermatology: “Squamous Cell Carcinoma.”

DermNet New Zealand: “Keratoacanthoma,” “Multiple Self-Healing Squamous Epitheliomas of Ferguson-Smith,”  “Grzybowski Generalized Eruptive Keratoacanthomas.”

Ronald Davis, MD, dermatologist in private practice; adjunct professor of dermatology, University of Texas Medical School San Antonio.

American Family Physician : “Diagnosing Common Benign Skin Tumors.”

American Society of Dermatologic Surgery: “Skin Cancer Information.”

OrphaNet: “Multiple Self-Healing Squamous Epithelioma.”

Reviewed by Debra Jaliman on March 06, 2017

SOURCES:

Journal of Investigative Dermatology : “Are Keratoacanthomas Variants of Squamous Cell Carcinomas? A Comparison of Chromosomal Aberrations by Comparative Genomic Hybridization.”

Medscape: “Keratoacanthoma.”

Cleveland Clinic Center for Continuing Education: “Nonmelanoma Skin Cancer.”

James Spencer, MD, dermatologist in private practice in St. Petersburg, FL, and clinical professor of dermatology at Mount Sinai School of Medicine.

Skin Cancer Foundation: “Squamous Cell Carcinoma.”

American Academy of Dermatology: “Squamous Cell Carcinoma.”

DermNet New Zealand: “Keratoacanthoma,” “Multiple Self-Healing Squamous Epitheliomas of Ferguson-Smith,”  “Grzybowski Generalized Eruptive Keratoacanthomas.”

Ronald Davis, MD, dermatologist in private practice; adjunct professor of dermatology, University of Texas Medical School San Antonio.

American Family Physician : “Diagnosing Common Benign Skin Tumors.”

American Society of Dermatologic Surgery: “Skin Cancer Information.”

OrphaNet: “Multiple Self-Healing Squamous Epithelioma.”

Reviewed by Debra Jaliman on March 06, 2017

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