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Poroma Follow-up

  • Author: Timothy McCalmont, MD; Chief Editor: Dirk M Elston, MD  more...
Updated: Mar 05, 2014


No preventative measures for benign adnexal neoplasms are known at this time.



No complications are specifically associated with poromas. The surgical treatment of poromas can produce the same common complications (eg, infection, hemorrhage) associated with any minor surgical procedure.



The prognosis of poromas is favorable because the lesions have no known clinical significance. Even poromatosis (multiple poromas) is not known to be associated with other anomalies. The risk of malignant transformation of a poroma is minimal and is thought to be similar to that of normal skin.

Contributor Information and Disclosures

Timothy McCalmont, MD Director, UCSF Dermatopathology Service, Professor of Clinical Pathology and Dermatology, Departments of Pathology and Dermatology, University of California at San Francisco; Editor-in-Chief, Journal of Cutaneous Pathology

Timothy McCalmont, MD is a member of the following medical societies: Alpha Omega Alpha, American Medical Association, American Society of Dermatopathology, California Medical Association, College of American Pathologists, United States and Canadian Academy of Pathology

Disclosure: Received consulting fee from Apsara for independent contractor.

Specialty Editor Board

Richard P Vinson, MD Assistant Clinical Professor, Department of Dermatology, Texas Tech University Health Sciences Center, Paul L Foster School of Medicine; Consulting Staff, Mountain View Dermatology, PA

Richard P Vinson, MD is a member of the following medical societies: American Academy of Dermatology, Texas Medical Association, Association of Military Dermatologists, Texas Dermatological Society

Disclosure: Nothing to disclose.

Jeffrey Meffert, MD Associate Clinical Professor of Dermatology, University of Texas School of Medicine at San Antonio

Jeffrey Meffert, MD is a member of the following medical societies: American Academy of Dermatology, American Medical Association, Association of Military Dermatologists, Texas Dermatological Society

Disclosure: Nothing to disclose.

Chief Editor

Dirk M Elston, MD Professor and Chairman, Department of Dermatology and Dermatologic Surgery, Medical University of South Carolina College of Medicine

Dirk M Elston, MD is a member of the following medical societies: American Academy of Dermatology

Disclosure: Nothing to disclose.

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Poroma. Courtesy of Jeffrey Meffert, MD.
This vascular-appearing poroma presented on the tip of the toe.
This intradermal poroma (dermal duct tumor) shows a sharply circumscribed border at scanning magnification. Highly vascularized and focally sclerotic stroma is also evident.
At higher magnification, ductal differentiation is conspicuous.
This juxtaepidermal poroma presents histopathologically in continuity with the epidermis, creating a seborrheic keratosis-like profile.
At higher magnification, this poroma is composed of monomorphous small keratinocytes with "cuboidal" cytomorphology.
This poroma shows focal sebaceous differentiation, indicating that the lesion is of folliculosebaceous-apocrine (rather than eccrine) lineage.
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