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Yeungnam Univ J Med > Volume 16(2); 1999 > Article
Yeungnam University Journal of Medicine 1999;16(2):296-301.
DOI:    Published online December 31, 1999.
MR Imaging of Uterine Malignant Mixed Mullerian Tumor: Comparison with Endometrial Carcinoma.
Jae Ho Cho, Jeen Woo Kim, Jay Chun Chang, Bok Hwan Park, Jung Sik Kim
1Department of Diagnostic Radiology College of Medicine, Yeungnam University, Taegu, Korea.
2Department of Diagnostic Radiology College of Medicine, Keimyung University, Taegu, Korea.
BACKGROUND: Generally, it is difficult to differentiate uterine malignant mixed Mullerian Tumor(MMMT) from endometrial carcinom in radiological and clinical aspects. Our purpose is to investigate MR findings that distinguishes MMMT from endometrial carcinoma. MATERIALS AND METHODS: We retrogradely evaluated the magnetic resonance imaging findings of pathologically proven 5 cases of malignant mixed Mullerian Tumor(MMMT) and 13 endometrial carcinomas to know the differential points of these two tumors originating in the endometrial cavity. The size of the mass, presence or absence of myometrial or uterine cervical invasion, growth pattern of the mass, signal intensity and degree and pattern of contrast enhancement were analyzed and compared. RESULTS: The length of the long axis of the MMMT was 1.5-9.0cm(average, 5.7cm) but that of the endometrial carcinoma was 0.5-6.0cm(average, 2.5cm). Invasion of uterine cervix which was found in 3 MMMT cases, dilated the endometrial cavity and the lumen of the uterin cervix and showed the pattern of growing into the external os. Invasion of uterine cervix was found in only one case of endometrial carcinoma. The presence or absence of myometrial invasion, the signal intensity and homogeneity on T1-and T2-weighted images, and the degree and patterns of contrase enhancement showed no significant difference. CONCLUSION: Any specific finding to differentiate MMMT from endometrial carcinoma was not ascertained. However, MMMT can be suspected if the size of the endometrial mass is greater than 5cm and if the mass dilates the enocervical canal and invades the uterine cervix.
Key Words: Malignant mixed Mullerian Tumor, Endometrial carcinoma, Magnetic resonance imaging
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