(a-c) Struma ovarii in a 35-year-old woman. These tumors are distinguished on the basis of the embryologic germ layer from which they are derived. 5, 23 May 2014 | Abdominal Imaging, Vol. Such thyroid tissue can occur as a minor component ofmature cystic teratomas, but in struma ovarii it is the predominant or sole tissue type. 5, 27 June 2012 | RadioGraphics, Vol. (a) Transabdominal US image shows a heterogeneous mass containing echogenic reflectors representing hair. 7, Journal of Evolution of Medical and Dental Sciences, Vol. Struma ovarii is composed predominantly or solely of mature thyroid tissue that demonstrates acini filled with thyroid colloid (,,,,,Fig 10). Infarcted mature cystic teratoma resulting from ovarian torsion in a 73-year-old woman. Because of their contain hair, teeth and other structures, they d ... Once an ovarian dermoid is removed , especially in the younger patient, follow up ultrasonography is required. (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. (d) High-power photomicrograph (original magnification, ×100; H-E stain) of the mass shows extensive mucin (M) surrounding carcinoid tumor cells.Download as PowerPointOpen in Image
Mature cystic teratoma in a 20-year-old woman. A report of 75 cases, High-Field Magnetic Resonance Imaging of the Pelvis, Ovarian Malignant Melanoma: A Clinicopathologic Study of 5 Cases, Rare growth of a psammomatous meningioma in a mature ovarian Teratoma: A case report, Contemporary Pediatric Gynecologic Imaging, Diffusion-Weighted Magnetic Resonance Imaging of Ovarian Tumors, Multi-detector CT Features of Benign Adnexal Lesions, The Differential Imaging Features of Fat-Containing Tumors in the Peritoneal Cavity and Retroperitoneum: the Radiologic-Pathologic Correlation, Intradural Lumbar Mature Teratoma With Neuronal and Glial Tissue Component in an Adult, Tératomes ovariens matures et immatures : caractéristiques en échographie, TDM et IRM, Imaging of Female Children and Adolescents with Abdominopelvic Pain Caused by Gynecological Pathologies, Mature and immature ovarian teratomas: CT, US and MR imaging characteristics, Bilan d’une masse pelvienne chez la femme jeune, Role of multidetector CT in the management of acute female pelvic disease, Imaging of ovarian teratomas: Appearances and complications, Corrélations anatomopathologiques : IRM des tumeurs ovariennes primitives, Évaluation de la séquence de diffusion pour l’étude des tumeurs annexielles, Imaging of Benign Adnexal Masses: Characteristic Presentations on Ultrasound, Computed Tomography, and Magnetic Resonance Imaging, Pattern recognition using transabdominal ultrasound to diagnose ovarian mature cystic teratoma, Acute Abdomen Due to Twisted Ovarian Immature Teratoma in a 7-Year-Old Girl, Imaging Findings of Complications and Unusual Manifestations of Ovarian Teratomas1, Adnexal masses: Accuracy of detection and differentiation with multidetector computed tomography, CT Images of a Malignant-Transformed Ovarian Mature Cystic Teratoma with Rupture: a Case Report, Laparoscopic surgery for large benign ovarian cysts, ULTRASOUND EVALUATION OF THE ADNEXA (OVARY AND FALLOPIAN TUBES), Meat balls: a pathognomonic ultrasound and computed tomography finding in mature cystic teratoma, MR features of fluid-fluid levels in ovarian masses, Tératome immature de l'ovaire avec gliomatose péritonéale. (a) Sagittal US image demonstrates a mostly echogenic mass (arrows) with some sound attenuation. The smaller mass demonstrates low-signal-intensity “shading” (open arrow), a finding that is typical of endometrioma. Mature cystic teratoma in a 48-year-old woman. 14, No. U = uterus. The hemorrhagic endometriosis (open arrow) still has high signal intensity. Viewer. 1, European Journal of Radiology, Vol. 16, No. 27, No. The smaller mass demonstrates low-signal-intensity “shading” (open arrow), a finding that is typical of endometrioma. 37, No. 7, No. in vitro
The patient’s α-fetoprotein level was 571 μg/L (normal, <15 μg/L). 4, 27 March 2014 | Endocrine Pathology, Vol. (d) Photomicrograph (original magnification, ×40; H-E stain) shows adipose tissue within the fatty nodule.Download as PowerPointOpen in Image
2, No. (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). 99, No. (a) Transverse transabdominal US image shows a heterogenous mass in the cul-de-sac (arrowheads). by DR TAHIR A SIDDIQUI ( consultant sonologist ) Gujranwala. 16 Women with encephalitis and an ovarian teratoma, and no evidence of infectious or toxicologic causes for the encephalitis, should be considered for teratoma removal. Chemical-shift artifact in the frequency-encoding direction can be used to detect fat and distinguish it from hemorrhage (,26). I don ... Teratomas are a type of tumor or mass made up of different types of tissues. 1, Journal of Chiropractic Medicine, Vol. 1, Journal of the Korean Society of Magnetic Resonance in Medicine, Vol. (b) Axial T1-weighted spin-echo MR image (683/16) shows a high-signal-intensity nodule in the wall of the mass. 24, No. 17, No. (b) T2-weighted fast spin-echo MR image (4,000/119 [effective]) shows the mass with very high signal intensity due to its mucinous contents (arrowheads). Figure 10c. (d) Struma ovarii. 2, 23 January 2004 | Journal of Clinical Ultrasound, Vol. Sebaceous material and cell debris are seen filling the cyst lumen (L).Download as PowerPointOpen in Image
2, 31 December 2015 | Australasian Journal of Ultrasound in Medicine, Vol. 36, No. 8.2 ), 25% will arise in the floor of the mouth and submandibular and submental spaces ( Fig. (a) Axial T1-weighted spin-echo MR image (897/16) shows a mass of the right ovary (arrowheads). (d) Photomicrograph (original magnification, ×40; H-E stain) shows complete necrosis (N) of the teratoma, but with preservation of the fat globules (F).Download as PowerPointOpen in Image
61, No. 4, 6 November 2007 | Australasian Radiology, Vol. Figure 8c. 3, Revista da Associação Médica Brasileira (English Edition), Vol. (a-c) Struma ovarii in a 35-year-old woman. (Courtesy of R. Epstein, MD, Department of Radiology, University of Medicine and Dentistry of New Jersey, New Brunswick).Download as PowerPointOpen in Image
(b) Transverse transabdominal US image through the midabdomen shows a larger mass containing calcifications (arrowheads). evidence. A dermoid cyst may be grossly identified within the immature teratoma in up to 26% of cases, or may be found in the opposite ovary (10%). Viewer. Foci of fat are difficult to appreciate. Mature cystic teratoma is the most common germ cell neoplasm and, in some series, the most common ovarian neoplasm removed at surgery (,7),(,8). Note how the cyst wall is folded back (thin arrow). (a) Axial T1-weighted spin-echo MR image (500/11) shows a large mass of the left ovary with multiple high-signal-intensity foci (arrowheads). Epidermoid cyst. (c) Axial gadolinium-enhanced fat-saturated T1-weighted gradient-echo MR image (180/1.7) shows the loculations with lacelike enhancement (arrow). Most mature cystic teratomas can be diagnosed at US. However, this is a rare complication, occurring in less than 1% of cases (,6). Photomicrograph (original magnification, ×40; H-E stain) of a specimen from a different patient shows thyroid follicles containing thick colloid (C). 6, 1 January 2005 | Journal of Magnetic Resonance Imaging, Vol. Typically, the tumors are heterogeneous, partially solid lesions (,46),(,47). Ectodermal tissue predominates. 10, 25 August 2006 | Abdominal Imaging, Vol. Low-signal-intensity central calcifications are also seen (thin arrow). 3, Journal of the American Academy of Physician Assistants, Vol. (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). In males, pre-puberty or pediatric testicular teratomas are usually mature and noncancerous. Malignant transformation of mature cystic teratoma is a rare complication, reported to occur in 1%–2% of cases in the older literature (,15). (b) T2-weighted fast spin-echo MR image (4,000/119 [effective]) shows the mass with very high signal intensity due to its mucinous contents (arrowheads). (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
Hemorrhagic cysts or blood clots typically demonstrate increased through-transmission. (a) Sagittal transabdominal US image shows an echogenic mass with sound attenuation (arrows). It has an imaging appearance that indicates the presence of the underlying mature cystic teratoma: a sebaceous lipid component as well as a heterogeneous solid component protruding into the cavity or extending transmurally into adjacent organs (,1),(,25). Yet, a thorough analysis of all ultrasound features that characterize dermoid cysts can … —33-year-old woman with mature cystic teratoma without fat in cystic cavity. (a) Axial T1-weighted spin-echo MR image (600/16) shows two high-signal-intensity masses of the right ovary (arrows). Mature cystic teratoma in a 48-year-old woman. 2, Journal of International Medical Research, Vol. The imaging appearance of ovarian carcinoid tumors is not well described. Dermoid cyst and intracystic nondependent spheres of lipid material in a 24-year-old pregnant woman. (a) Axial T1-weighted spin-echo MR image (repetition time msec/echo time msec = 879/14) shows a high-signal-intensity mass of the right ovary (arrow). (c) CT scan through the pelvis shows a mature cystic teratoma in the cul-de-sac with fat attenuation and central calcification (arrowheads). (b) T2-weighted MR image (7,533/84 [effective]) shows the round masses (F) floating in high-signal-intensity fluid within the cyst (arrowheads). residual germ cell tumour anterior caval mass, resection: - residual mature teratoma, completely excised in the plane of section. (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. Mature cystic teratoma in a 48-year-old woman. 5, 26 December 2016 | Journal of Obstetrics, Gynecology and Cancer Research, Vol. Common benign adnexal cyst types include simple, hemorrhagic, endometrioma, and mature teratoma (dermoid cyst). 1, The International Journal of Biological Markers, Vol. 56, No. 32, No. 1, 31 May 2006 | European Radiology, Vol. Viewer. (b) T2-weighted fast spin-echo MR image (6,000/105 [effective]) shows some of the cyst loculations with very low signal intensity (arrows). In a prospective US study that made use of these criteria, Mais et al (,20) found a sensitivity of 58% and a specificity of 99% in the diagnosis of mature cystic teratoma. 17, International Journal of Gynecological Pathology, Vol. Two molar teeth are also evident (arrows).Download as PowerPointOpen in Image
Viewer. (a) Sagittal US image demonstrates a mostly In fact, this type of cyst accounts for roughly one-third of benign ovarian tumors that are diagnosed each year. (d) High-power photomicrograph (original magnification, ×100; H-E stain) of the mass shows extensive mucin (M) surrounding carcinoid tumor cells. 2, Korean Journal of Radiology, Vol. Dermoid cysts are also called teratoma because they refer to developmentally advanced tissues in an array. (c) On a sagittal US image, the mass has a solid appearance (arrowheads), but there is no evidence of fat. The patient’s α-fetoprotein level was 571 μg/L (normal, <15 μg/L). [] Dermoid and epidermoid cysts are both thought to arise from defects in the separation of the neuroectoderm during the formation of the neural tube, leading to sequestration of ectodermal remnants. (c) Axial gadolinium-enhanced fat-saturated T1-weighted gradient-echo MR image (180/1.7) shows the loculations with lacelike enhancement (arrow). (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). The smaller mass demonstrates low-signal-intensity “shading” (open arrow), a finding that is typical of endometrioma. (c) Axial fat-saturated T1-weighted gradient-echo MR image (300/2.9) demonstrates saturation of the contents of the larger cyst (solid arrow). In this article, we discuss and illustrate typical manifestations of mature cystic teratomas (dermoid cysts), immature teratomas, and monodermal teratomas of the ovary (struma ovarii, carcinoid tumors, neural tumors) at computed tomography (CT), ultrasonography (US), and MR imaging. (d) Photograph of the gross specimen shows yellowish, pasty sebaceous material (black arrowhead) and hair (white arrowheads) within the cyst cavity, findings that account for the fat echogenicity and signal intensity seen at US and MR imaging. Figure 6a. 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). (c) CT scan through the pelvis shows a mature cystic teratoma in the cul-de-sac with fat attenuation and central calcification (arrowheads). At gross pathologic examination, ovarian carcinoid tumors are solid (,14),(,49). 3, 13 August 2014 | Head and Neck Pathology, Vol. Ovarian teratomas are mostly mature and are also known as dermoid cysts. Three methods can be used to distinguish the fatty contents of a mature cystic teratoma from endometriomas or other hemorrhagic cysts. OTs are … Differentiate between mature cystic teratomas, immature teratomas, and monodermal teratomas on the basis of histologic and radiologic findings. 2, European Journal of Radiology Extra, Vol. 25, No. (a) Axial T1-weighted spin-echo MR image (897/16) shows a mass of the right ovary (arrowheads). 3, No. Management, survival and ovarian prognosis. (c) Fat-saturated T1-weighted MR image (666/8) shows the masses with slightly diminished signal intensity (F) compared with the non-fat-saturated T1-weighted image (cf a). (a) Axial T1-weighted spin-echo MR image (500/11) shows a large mass of the left ovary with multiple high-signal-intensity foci (arrowheads). 4, 23 November 2010 | Abdominal Imaging, Vol. There is no evidence of calcification or fat. Figure 10b. C = functional cyst. (c) Photograph of the bisected tumor shows the two components of the fat attenuation seen in b: the Rokitansky nodule (thick arrow), which has the yellowish appearance of adipose tissue, and sebaceous components (F). Mature cystic teratoma of the right ovary in a 19-year-old pregnant woman. Fig. 35, No. Immature teratoma associated with contralateral mature cystic teratoma in a 27-year-old woman. 93, No. Discuss the histologic characteristics and specific US, CT, and MR imaging features of the various types of ovarian teratomas. (b) T2-weighted fast spin-echo MR image (4,000/119 [effective]) shows the mass with very high signal intensity due to its mucinous contents (arrowheads). Figure 9d. 5, Seminars in Ultrasound, CT and MRI, Vol. 7. Spinal dermoid cysts are uncommon overall but account for nearly 20% of intradural tumors seen in patients younger than one year of age 2. 10 MCTs occur most commonly during the reproductive years, but they may be encountered at any age, Figure 11a. It seems like you could use some support in making sense of all this. 1, Topics in Magnetic Resonance Imaging, Vol. 30, No. Struma ovarii and carcinoid tumors are monodermal teratomas and do not demonstrate fat. (a) Sagittal transabdominal US image shows an echogenic mass with sound attenuation (arrows). (a-c) Struma ovarii in a 35-year-old woman. At CT and MR imaging, immature teratomas characteristically have a large, irregular solid component containing coarse calcifications. (c) Axial fat-saturated T1-weighted gradient-echo MR image (290/2.1) demonstrates saturation of the cyst contents (arrow). (d) Photomicrograph (original magnification, ×40; H-E stain) shows complete necrosis (N) of the teratoma, but with preservation of the fat globules (F).Download as PowerPointOpen in Image
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