Crutchfield Dermatology Case-of-the-month header image

Case of the Month

lump in hand

A 50-year-old man presents with "a bump on the back of my hand that I can move all around under my skin." He reports no pain unless the bump is pushed on very firmly. He noticed the lump about a year ago. He has no medical history significant for this lesion. He is a carpenter.

What's Your Diagnosis?


Diagnosis: Mobile Encapsulated 'Pea-Sized' Lipoma

I have seen many of these over the years, but I did not know what to call it. They have no attachment to any vascular source and appear to be more fascinating that problematic/worrisome. After some research, I found that this lesion has been called many things, including: nodular-cystic fat necrosis, mobile encapsulated lipoma, encapsulated fat necrosis, and encapsulated necrosis. Some report the development after trauma. Many patients do not recall any trauma, but as this patient said, "I am a carpenter, I bang my hands all the time." I prefer the term Mobile Encapsulated 'Pea-Sized' Lipoma' because it is much smaller than the traditional lipoma. Perhaps an alternative name is Mobile Encapsulated Small Lipoma, but Mobile Encapsulated 'Pea-Sized' Lipoma gives one a much better idea of the true size, and all that I have seen are "about "pea-sized," as shown in the photo.

lump in hand
lump in hand

I did the lesion's excision, so the photo is of the actual lesion he was pushing around. My good friend Eric Jacobson, MD, was kind enough to do the pathology and send the excellent photomicrographs.

Reference

Mobile Encapsulated Lipoma
Nodular-Cystic Fat Necrosis


online appointments

Charles Crutchfield III M.D. Eagan Dermatologist

For more dermatology cases-of-the-month visit Dr. Crutchfield's Case of the Month Archive



Look Good, Feel Great with Beautiful Skin ™

Dr. Crutchfield is a member or graduate of these prestigious organizations.

Demonstrating his education, experience, and commitment to providing patients with the highest quality medical & cosmetic dermatologic care.
When choosing your physician, demand nothing less. Remember..... "Quality Matters"


Crutchfield Dermatology Location
Crutchfield Dermatology Logo
top 100 places to work

Crutchfield Dermatology

1185 Town Centre Drive, Suite 101
Eagan, MN 55123 USA

Phone: (651) 209-3600 Fax: (651) 209-3601

Hours: Monday-Friday 8am-5pm

Award-winning monthly newsletter sign up



©Crutchfield Dermatology
All Photographs copyright protected, unauthorized use is prohibited.

Web Site by Arbor Bay Marketing

Alpha Omega Alpha Honor Medical Society