MR Imaging Findings of Pineal Germinoma: Focus on Differential Diagnosis from Other Germ Cell Tumors
Journal of the Korean Radiological Society
;
: 639-646, 1998.
Artículo
en Coreano
| WPRIM
| ID: wpr-166585
ABSTRACT
PURPOSE:
To determine the characteristic MR imaging findings of pineal germinoma, and differential diagnosisfrom other germ cell tumors. MATERIALS ANDMETHODS:
MR images of patients with histopathologically proven pinealgerminoma(n=14) and other pineal germ cell tumors(n=10) were retrospectively analyzed with regard to size, signalintensity and homogenetiy, enhancing features, cyst formation, and multiplicity of lesions. Other pineal germ celltumors were the mixed germ cell tumors (n=4), malignant teratomas(n=3), choriocarcinoma(n=1), embryonalcarcinoma(n=1), and endodermal sinus tumor(n=1). Tumor markers were evaluated.RESULTS:
On T1-weighted images,germinomas showed homogeneous(86%) or iso signal intensity(93%), while other germ cell tumors showedinhomogeneous(70%) or iso signal intensity(70%). On T2-weighted images, germinomas showed homogeneous(64%) or isosignal intensity(57%), while other germ cell tumors showed inhomogeneous(70%) or high signal intensity(80%). OnGd-DTPA enhanced images, germinomas showed homogeneous (93%) or strong enhancement(64%), while other germ celltumors showed homogeneous(60%) or strong enhancemant(70%). Cyst formation was noted in ten patients(71%) withgerminoma and in six(60%) with other germ cell tumors, Invasion of surrounding structures was seen in 11 patients(79%) with germinoma and in five(50%) with other germ cell tumors. Lesions were multiple in three patients(21%)with germinoma. Thirteen of 14 patients with germinoma had normal serum alpha-FP(tetoprotein) and beta-HCG(humanchononic gonafotrophin) levels. Two of four patients with mixed germ cell tumors had elevated serum alpha-FP andalpha-HCG levels; in the other two, elevated serum alpha-FP or beta-HCG levels were noted. In the malignant teratoma andembryonal carcinoma patients, serum alpha-FP and beta-HCG levels were normal. The patient with choriocarcinoma had anelevated serum beta-HCG level.CONCLUSION:
On T1W1, the only significant differential point(P<0.01) betweengerminomas and other germ cell tumors was homogeneity. Germinomas were frequently homogeneous, and iso signalintensity on T1WI and T2WI, strong enhancement, and the formation of small cysts(<3mm) was noted. This MR imagingfinding, combined with assay for tumor markers, is helpful for the differential diagnosis of pineal germinoma andother cell tumors.
Texto completo:
Disponible
Índice:
WPRIM (Pacífico Occidental)
Asunto principal:
Teratoma
/
Imagen por Resonancia Magnética
/
Coriocarcinoma
/
Biomarcadores de Tumor
/
Estudios Retrospectivos
/
Germinoma
/
Neoplasias de Células Germinales y Embrionarias
/
Diagnóstico Diferencial
/
Endodermo
/
Células Germinativas
Tipo de estudio:
Estudio diagnóstico
/
Estudio observacional
Límite:
Femenino
/
Humanos
/
Embarazo
Idioma:
Coreano
Revista:
Journal of the Korean Radiological Society
Año:
1998
Tipo del documento:
Artículo
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