Dermoid Cyst Workup

  • Author: Robert A Schwartz, MD, MPH; Chief Editor: Dirk M Elston, MD   more...
 
Updated: Feb 24, 2012
 

Imaging Studies

  • Radiography, CT scanning, and MRI are helpful in making the correct differential diagnosis of dermoid cysts.
  • MRI is particularly helpful in diagnosing intracranial or intramedullary dermoid cysts and in assessing the dissemination of fatty masses or droplets.
  • MRI is helpful in planning surgical procedures and in assessing therapeutic success.
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Histologic Findings

Dermoid cysts are a result of the sequestration of the skin along the lines of embryonic closure. If connected with the ovary, dermoid cysts are true teratomas.

In contrast to epidermal inclusion cysts, dermoid cysts in the skin are lined by an epidermis that possesses various epidermal appendages. As a rule, these appendages are fully mature. Hair follicles containing hairs that project into the lumen of the cyst are often present. The dermis of dermoid cysts usually contains sebaceous glands, eccrine glands, and, in many patients, apocrine glands. Occasionally, the lining epithelium may proliferate as papillary boundaries extend externally or inward toward the lumen of the cyst. This proliferation may have some superficial resemblance to epidermal carcinomatous proliferation, and the growth may be misclassified as a cancer.

Dermoid cysts in the ovary (cystic teratomas) or those disseminated intra-abdominally may contain other structures such as nails, hairs, or cartilage and bone fragments. These cysts have cell walls that are almost identical to those of the skin, and they may contain multiple adnexal skin structures such as hair follicles, sweat glands, and occasionally, hair, teeth, or nerves.

A congenital dermoid together with a bronchogenic cyst of the tongue is extremely rare but has been described in a few patients.[30]

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Contributor Information and Disclosures
Author

Robert A Schwartz, MD, MPH  Professor and Head, Dermatology, Professor of Pathology, Pediatrics, Medicine, and Preventive Medicine and Community Health, University of Medicine and Dentistry of New Jersey-New Jersey Medical School

Robert A Schwartz, MD, MPH is a member of the following medical societies: Alpha Omega Alpha, American Academy of Dermatology, American College of Physicians, and Sigma Xi

Disclosure: Nothing to disclose.

Coauthor(s)

Zbigniew Ruszczak, MD, PhD  Consultant Dermatologist and Allergist, Department of Medicine, Division of Dermatology, Sheikh Khalifa Medical City, Abu Dhabi, UAE; Consultant in Pediatric Dermatology, Wound Healing and On-Site-Drug Delivery Systems; Visiting Consultant in Dermatology and Dermatopathology, UMDNJ-New Jersey Medical School, Newark

Zbigniew Ruszczak, MD, PhD is a member of the following medical societies: American Academy of Dermatology, New York Academy of Sciences, and Sigma Xi

Disclosure: Nothing to disclose.

Specialty Editor Board

Albert C Yan, MD  Section Chief, Associate Professor, Department of Pediatrics, Section of Dermatology, Children's Hospital of Philadelphia and University of Pennsylvania School of Medicine

Albert C Yan, MD is a member of the following medical societies: American Academy of Dermatology, American Academy of Pediatrics, Society for Investigative Dermatology, and Society for Pediatric Dermatology

Disclosure: Nothing to disclose.

David F Butler, MD  Professor of Dermatology, Texas A&M University College of Medicine; Chair, Department of Dermatology, Director, Dermatology Residency Training Program, Scott and White Clinic, Northside Clinic

David F Butler, MD is a member of the following medical societies: Alpha Omega Alpha, American Academy of Dermatology, American Medical Association, American Society for Dermatologic Surgery, American Society for MOHS Surgery, Association of Military Dermatologists, and Phi Beta Kappa

Disclosure: Nothing to disclose.

Robert A Schwartz, MD, MPH  Professor and Head, Dermatology, Professor of Pathology, Pediatrics, Medicine, and Preventive Medicine and Community Health, University of Medicine and Dentistry of New Jersey-New Jersey Medical School

Robert A Schwartz, MD, MPH is a member of the following medical societies: Alpha Omega Alpha, American Academy of Dermatology, American College of Physicians, and Sigma Xi

Disclosure: Nothing to disclose.

Glen H Crawford, MD  Assistant Clinical Professor, Department of Dermatology, University of Pennsylvania School of Medicine; Chief, Division of Dermatology, The Pennsylvania Hospital

Glen H Crawford, MD is a member of the following medical societies: Alpha Omega Alpha, American Academy of Dermatology, American Medical Association, Phi Beta Kappa, and Society of USAF Flight Surgeons

Disclosure: Nothing to disclose.

Chief Editor

Dirk M Elston, MD  Director, Ackerman Academy of Dermatopathology, New York

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

Disclosure: Nothing to disclose.

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