10135 - Melanocytic Lesions with Scarring and Desmoplasia

Course Director

Steven R. Tahan, M.D., Harvard Medical School


This course is designed to identify the problems and pitfalls associated with pathologic diagnosis of melanocytic lesions with fibrosis. It presents multiple case examples and decriptive summary slides to describe the characteristics features of irritated melanocytic nevi, recurrent banal and dysplastic nevi, regression-associated fibrosis in malignant melanomas, sclerosing nevi and desmoplastic melanoma. It describes pitfalls, limitations of interpretation, and applications of immunohistochemicstry, utilizing an image-intensive format.


AMA PRA Category 1 Credits™

Opus Medicus designates this Internet enduring material for a maximum of 1.75 AMA PRA Category 1 Credits™. Physicians should claim only the credit commensurate with the extent of their participation in the activity.

Maintenance of Certification (MOC) Credits

In addition to AMA PRA Category 1 Credits™, Opus Medicus designates this course for Specialty Board MOC Program Credits:

1.75 ABP CC/MOC Credits1

Accreditation Statement

Opus Medicus is accredited by the Accreditation Council for Continuing Medical Education (ACCME) to provide continuing medical education for physicians.

Tuition Fees

Course & Credits: $45.50

Course Dates

Last Review Date: 26-Sep-2020
Expiration Date: 26-Sep-2023


After taking this course, participants are expected to be able to:

1. Identify the histology of irritated nevi.

2. Identify the histology of recurrent nevi and limitations of diagnosis based on recurrence.

3. Understand pitfalls in interpretation in relation to the diagnosis of malignancy.

4. Differentiate sclerosing nevi from desmoplastic melanoma and understand the utility of immunostains.


1. Irritated nevi.

2. Recurrent nevus phenomenon.

3. Regression in melanoma.

4. Sclerosing nevi, desmoplastic melanoma, and utility of immunostains.

Specific topics covered in this AMA PRA Categogy 1 Credit™ online CME course include Irritated nevus, recurrent nevus, regression, sclerosing nevus, desmoplastic nevus, and desmoplastic melanoma.

American Board of Medical Specialties (ABMS) / Accreditation Council for Graduate Medical Education (ACGME) Competencies

☑  Patient Care (PC)
☑  Medical Knowledge (MK)
☑  Practice-Based Learning (PBL)

Financial Relationship Disclosure and Content Attestation

Dr. Steven R. Tahan attests that commercial entities with which he has relationships do not offer healthcare related products or services relevant to the content of this course. No other person who has provided content for or who can influence the content of this course has disclosed financial relationships with commercial entities that offer healthcare-related products or services relevant to the course content.

There has been no commercial support for this course.

Supported Computer Hardware and Software Configurations2

Supported client computing platforms include:

A broadband Internet connection is required (e.g., cable, DSL, and 3G or 4G wireless). The course presentation is automatically scaled to the size of the display, from 800x480 pixels (minimum supported) to 1920x1200 pixels. On some smart phones, viewing courses may be tedious.

Supported browsers include:

Javascript, cookies, and popups must be enabled on your browser (which is the default configuration for most browsers).

1. Successful completion of this CME activity, which includes participation in the evaluation component, enables the participant to earn up to 1.75 CC/MOC credits for the American Board of Pathology (ABP) Continuing Certification (CC) / Maintenance of Certification (MOC) Program, in addition to AMA PRA Category 1 Credits™. Participants will earn CC/MOC credits equivalent to the amount of AMA PRA Category 1 credits claimed for the activity. Immediately upon course completion, Opus Medicus will submit participant completion information to ACCME for the purpose of granting ABP CC/MOC credit.

2. The course may also be viewable on other client computing platforms that comply with Internet standards. If you experience technical problems that prevent you from viewing the course, we will promptly issue a full refund upon request.