A dermoid cyst is a teratoma of a cystic nature that contains an array of developmentally mature, solid tissues. It frequently consists of skin , hair follicles , and sweat glands , while other commonly found components include clumps of long hair , pockets of sebum , blood , fat , bone , nail , teeth , eyes , cartilage , and thyroid tissue. As dermoid cysts grow slowly and contain mature tissue, this type of cystic teratoma is nearly always benign. In those rare cases wherein the dermoid cyst is malignant , a squamous cell carcinoma usually develops in adults, while infants and children usually present with an endodermal sinus tumor. Ovaries normally grow cyst-like structures called follicles each month.
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These slow-growing tumors contain elements from multiple germ cell layers and are best assessed with ultrasound. Although they have very similar imaging appearances, the two have a fundamental histological difference: a dermoid is composed only of dermal and epidermal elements which are both ectodermal in origin , whereas teratomas also comprise mesodermal and endodermal elements. For the sake of simplicity, both are discussed in this article, as much of the literature combines the two entities.
Uncomplicated ovarian dermoid tend to be asymptomatic and are often discovered incidentally. They do, however, predispose to ovarian torsion , and may then present with acute pelvic pain. Mature cystic teratomas are encapsulated tumors with mature tissue or organ components. They are composed of well-differentiated derivations from at least two of the three germ cell layers i. Typically their diameter is smaller than 10 cm, and rarely more than 15 cm.
Ultrasound is the preferred imaging modality. Typically an ovarian dermoid is seen as a cystic adnexal mass with some mural components. Most lesions are unilocular. CT has high sensitivity in the diagnosis of cystic teratomas 6 though it is not routinely recommended for this purpose owing to its ionizing radiation.
Typically CT images demonstrate fat areas with very low Hounsfield values , fat-fluid level , calcification sometimes dentiform , Rokitansky protuberance , and tufts of hair.
Whenever the size exceeds 10 cm or soft tissue plugs and cauliflower appearance with irregular borders are seen, malignant transformation should be suspected 5.
When ruptured, the characteristic hypoattenuating fatty fluid can be found as anti dependent pockets, typically below the right hemidiaphragm, a pathognomonic finding 2. MR evaluation usually tends to be reserved for difficult cases but is exquisitely sensitive to fat components. Both fat suppression techniques and chemical shift artifact can be used to confirm the presence of fat.
Enhancement is also able to identify solid invasive components, and as such can be used to accurately locally stage malignant variants.
Mature ovarian teratomas are slow-growing mm a year and, therefore, some advocate nonsurgical management. Larger lesions are often surgically removed. Please Note: You can also scroll through stacks with your mouse wheel or the keyboard arrow keys.
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Mature cystic ovarian teratoma Dr Matt A. On this page:. Quiz questions. Ovarian teratomas: tumor types and imaging characteristics. Radiographics full text - Pubmed citation.
Edit article Share article View revision history Report problem with Article. URL of Article. Article information. System: Gynaecology. Tags: ovary , ovarian cancer , ovarian carcinoma , dermoid , teratoma , ultrasound , pelvic mri.
Synonyms or Alternate Spellings: Ovarian dermoid Benign cystic teratoma of ovary Mature ovarian teratoma Ovarian dermoids Mature cystic teratoma of ovary Ovarian mature cystic teratoma Dermoid cyst of the ovary Ovarian dermoid cyst. Support Radiopaedia and see fewer ads. Cases and figures. Figure 1: macroscopic pathology Figure 1: macroscopic pathology. Figure 2: macroscopic pathology Figure 2: macroscopic pathology. Case 1: on abdominal radiograph Case 1: on abdominal radiograph.
Figure 2: cut specimen Figure 2: cut specimen. Case 3 Case 3. Case 4 Case 4. Case 5 Case 5. Case 7 Case 7. Case 8: containing tooth Case 8: containing tooth. Case 9 Case 9. Case 10 Case Case Rokitansky nodule Case Rokitansky nodule. Case 13 Case Case 14 Case Case with incidental septate uterus Case with incidental septate uterus.
Case complicated by ovarian torsion Case complicated by ovarian torsion. Case bilateral lesions Case bilateral lesions. Case 19 Case Case 20 Case Case 21 Case Case 22 Case Case with rupture Case with rupture. Case 24 Case Case 25 Case Case mimicking a ureteric calculus Case mimicking a ureteric calculus. Case with a fat fluid level Case with a fat fluid level. Case 28 Case Case 29 Case Case 31 Case Case 32 Case Case 33 Case Case 34 Case Case bilateral Case bilateral.
Case left sided Case left sided. Case with multiple floating ball appearance Case with multiple floating ball appearance.
Case 39 Case Case mature cystic ovarian teratoma Case mature cystic ovarian teratoma. Case 41 Case Case 42 Case Case 43 Case Case 44 Case Case Mature cystic ovarian teratoma Case Mature cystic ovarian teratoma.
Imaging differential diagnosis. Leiomyoma with fatty degeneration Leiomyoma with fatty degeneration. Loading more images Close Please Note: You can also scroll through stacks with your mouse wheel or the keyboard arrow keys. Loading Stack - 0 images remaining. By System:. Patient Cases. Contact Us.
Jurnal kista dermoid
These slow-growing tumors contain elements from multiple germ cell layers and are best assessed with ultrasound. Although they have very similar imaging appearances, the two have a fundamental histological difference: a dermoid is composed only of dermal and epidermal elements which are both ectodermal in origin , whereas teratomas also comprise mesodermal and endodermal elements. For the sake of simplicity, both are discussed in this article, as much of the literature combines the two entities. Uncomplicated ovarian dermoid tend to be asymptomatic and are often discovered incidentally. They do, however, predispose to ovarian torsion , and may then present with acute pelvic pain.
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