Volume 22, Issue 4 (2-2009)                   Med J Islam Repub Iran 2009 | Back to browse issues page

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Motabar A R. Epidermal inclusion cysts of the breast. Med J Islam Repub Iran 2009; 22 (4) :207-211
URL: http://mjiri.iums.ac.ir/article-1-20-en.html
Department of Surgery, Iran University of Medical Sciences, Rasool-e- Akram Hospital , amotabar@yahoo.com
Abstract:   (6142 Views)

Abstract

Epidermal inclusion cysts are uncommon in the breast, but the consequences can be

severe when these cysts occur in the breast parenchyma. Here, we report two such

cases. The patient in case 1 was an 37-year-old woman with a 3-cm palpable mass in

the right breast. Mammography revealed a round and smoothly outlined mass, which

indicated a benign tumor, and sonography showed an irregularly shaped and heterogeneous

hypoechoic mass, fibroadenoma was suspected on the basis of clinical and

image findings, but excisional biopsy revealed an epidermal inclusion cyst. The patient

in case 2 was a 50-year-old woman with a 2.5-cm lesion in the left breast. Mammography

revealed a round, dense, smoothly outlined mass, and sonography showed

a well-defined, central hyperechoic mass. . Breast cancer was suspected on the basis

of the sonographic findings and the age of the patient, but the resected specimen revealed

an epidermal inclusion cyst. Although epidermal inclusion cysts are benign,

occasionally they may play a role in the origin of squamous carcinoma of the breast. .

Mammographic and sonographic features of an epidermal cyst may mimic a malignant

lesion. Malignant change appears to occur more frequently in epidermal inclusion

cysts in the mammary gland, compared to common epidermal inclusion cysts,

and this may be associated with origination of mammary epidermal inclusion cysts

from squamous metaplasia of the mammary duct epithelium.

Epidermmoid inclusion cyst of the breast is potentially serious, although such cysts

are rare, and differentiation from a malignant or benign breast tumor is required. Excision

is probably the most appropriate treatment, and can eliminate the possible risk

of malignant transformation.

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Type of Study: case report | Subject: Surgery

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