Mature cystic teratomas (a more appropriate term than the commonly used “dermoid cysts”) are cystic tumors composed of well-differentiated derivations from at least two of the three germ cell layers (ectoderm, mesoderm, and endoderm). 32, No. (d) CT scan through the abdominal mass shows an immature teratoma (arrowheads) with foci of fat (arrow) and scattered calcifications.Download as PowerPointOpen in Image 50, American Journal of Obstetrics and Gynecology, Vol. Photomicrograph (original magnification, ×40; H-E stain) of a specimen from a different patient shows thyroid follicles containing thick colloid (C). The ovarian teratoma comes under the category of mature ones. (d) High-power photomicrograph (original magnification, ×100; H-E stain) of the mass shows extensive mucin (M) surrounding carcinoid tumor cells. 9, Radiologic Clinics of North America, Vol. May be associated with occult spinal dysraphism. (a) Axial T1-weighted spin-echo MR image (600/16) shows two high-signal-intensity masses of the right ovary (arrows). Mature cystic teratomas requiring removal can be treated with simple cystectomy. Dermoid cyst and intracystic nondependent spheres of lipid material in a 24-year-old pregnant woman. 55, No. Mature cystic teratoma in a 20-year-old woman. In rare cases (1-3%), they may undergo malignant change. (b) Axial fat-saturated T1-weighted gradient-echo MR image (150/1.7) demonstrates saturation of the high-signal-intensity foci within the mass (arrow), a finding that indicates fat. 6, 1 January 2017 | Journal of Gynecologic Oncology, Vol. Mature teratomas generally are benign, with 0.17-2% of mature cystic teratomas becoming malignant. Findings suggestive of torsion include deviation of the uterus to the twisted side, engorged blood vessels on the twisted side, a mass with a high-signal-intensity rim on T1-weighted MR images, a low-signal-intensity torsion knot, and thick, straight blood vessels that drape around the mass and cause complete absence of enhancement (,36),(,37). (c) On a fat-suppressed T1-weighted gradient-echo MR image (200/2.1), the signal of the lipid material within the mass is suppressed (arrow). 2016, Revista Argentina de Radiología, Vol. Sebaceous material and cell debris are seen filling the cyst lumen (L).Download as PowerPointOpen in Image 22, No. “Derm” refers to skin. Chemical-shift artifact in the frequency-encoding direction can be used to detect fat and distinguish it from hemorrhage (,26). 21, No. Viewer. (b) On a T2-weighted fast spin-echo MR image (4,050/105 [effective]), the mass demonstrates heterogeneous internal signal intensity with punctate high signal intensity (arrow). 1, 1 February 2018 | Gynäkologische Endokrinologie, Vol. 18, No. (c) On a sagittal US image, the mass has a solid appearance (arrowheads), but there is no evidence of fat. 103, No. Usually, dermoid cysts are found by accident when a woman’s pelvis is being imaged for something unrelated. Figure 10d. (a) Axial T1-weighted spin-echo MR image (500/8) shows a mass of the right ovary with multiple loculations (arrowheads), some of which have high signal intensity. (a) Axial T1-weighted spin-echo MR image (500/8) shows a mass of the right ovary with multiple loculations (arrowheads), some of which have high signal intensity. 2, Formosan Journal of Surgery, Vol. 190, No. 2004 Sep-Oct. 24(5):357-60. . (c) On a fat-suppressed T1-weighted gradient-echo MR image (200/2.1), the signal of the lipid material within the mass is suppressed (arrow). (c) Fat-suppressed T1-weighted fast multiplanar spoiled gradient-echo MR image (200/3.6) shows that some of the high-signal-intensity foci in a are hemorrhagic and retain their high signal intensity (open arrowhead), whereas others represent foci of fat (solid arrowheads). The bulk of the cyst cavity is filled with hair (arrowheads). 6, Topics in Magnetic Resonance Imaging, Vol. (a-c) Struma ovarii in a 35-year-old woman. The patient’s α-fetoprotein level was 571 μg/L (normal, <15 μg/L). 1, European Journal of Radiology, Vol. Although they are considered to have a potential for malignancy, most of these tumors have a relatively benign clinical course, with metastases being uncommon. 25, No. Two molar teeth are also evident (arrows). Carcinoid syndrome is uncommon. 34, No. (c) Axial T2-weighted MR image (5,200/98 [effective]) shows the mass with a solid appearance (arrow). Pure sebum within the cyst may be hypoechoic or anechoic (,19). Mature cystic teratomas arise from a single germ cell after the first meiotic division (,10). (d) CT scan through the abdominal mass shows an immature teratoma (arrowheads) with foci of fat (arrow) and scattered calcifications.Download as PowerPointOpen in Image There are three main types of ovarian monodermal tumors: struma ovarii, ovarian carcinoid tumors, and tumors with neural differentiation. The hemorrhagic endometriosis (open arrow) still has high signal intensity. 198, No. U = uterus. (b) T2-weighted MR image (7,533/84 [effective]) shows the round masses (F) floating in high-signal-intensity fluid within the cyst (arrowheads). 6, 22 August 2006 | Archives of Gynecology and Obstetrics, Vol. 25, No. ct scan shows i have a cystic teratoma/dermoid cyst with an additional 3.5 cm rounded fluid attenuation mass within r pelvis abutting the above mass. 52, No. Dermoid cysts are congenital, … 60, No. Foci of fat are difficult to appreciate. (b) On a T2-weighted fast spin-echo MR image (4,050/105 [effective]), the mass demonstrates heterogeneous internal signal intensity with punctate high signal intensity (arrow). —33-year-old woman with mature cystic teratoma without fat in cystic cavity. In contrast to mature cystic teratoma, malignant transformation occurs in the 6th or 7th decade of life. 4, Journal of Minimally Invasive Gynecology, Vol. (d) Struma ovarii. (a) Sagittal transabdominal US image shows an echogenic mass with sound attenuation (arrows). The bulk of the cyst cavity is filled with hair (arrowheads). What is Immature Teratoma? 12, Gastroentérologie Clinique et Biologique, Vol. Figure 3c. Figure 4a. (b) T1-weighted gradient-echo MR image (200/4.2) shows the mass (thick arrow) with high-signal-intensity fat (F). 3, Journal of the American Academy of Physician Assistants, Vol. Figure 8c. Viewer. Secretory granules are seen within the tumor cells, and immunocytochemical analysis demonstrates serotonin and hormonal peptides, which are typically present in carcinoid tumors (,14),(,51). 33, No. (c) Axial fat-saturated T1-weighted gradient-echo MR image (300/2.9) demonstrates saturation of the contents of the larger cyst (solid arrow). Dermoid cyst teratoma. Viewer. Figure 2b. 22, No. Such thyroid tissue can occur as a minor component ofmature cystic teratomas, but in struma ovarii it is the predominant or sole tissue type. Viewer. 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