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"A Surprise Calcification"



Case of the Week 273

What's the most likely diagnosis?

  • 49 year-old female with dull right lower quadrant pain

  1. Uterine fibroid
  2. Mucocoele of the appendix
  3. Appendicolith
  4. Iliac artery aneurysm
  5. Dermoid cyst



5. Dermoid Cyst



More (Click Discussion Tab)

Dermoid Cyst of the Ovary

General Considerations

  • Dermoids, a term now used almost always interchangeably with teratomas, are tumors derived from more than one germ layer, frequently all three
    • As such, they can include hair, teeth, fat, skin, muscle, endocrine tissue
    • Ectodermal tissue predominates
  • Mature cystic teratomas are commonly referred to as dermoid cysts
  • They are the most common ovarian neoplasm
  • Mature cystic teratoma of the ovary is invariably benign
    • In rare cases (1-3%), they may undergo malignant change
      • The prognosis is generally poor for such malignant tumors
  • They can occur at any age
    • More common during reproductive years (16-55)
      • Peak incidence from 20-40
    • During adolescence, 50% of adnexal neoplasms are mature cystic teratomas

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