Toshio Tenzaki

Hemorrhagic infarction of the diseased ovary: A common MR finding in two cases

Two patients with surgically confirmed hemorrhagic infarction of ovarian tumor due to torsion were studied with MR imaging. Histology of the two lesions were serous cystadenoma and fibroma. In both cases, a high intensity rim was observed at the periphery of the mass on T1-weighted image. This finding is thought to be a MRI sign of hemorrhagic infarction of the diseased ovary and to provide a useful clue for urgent surgery.

AFP in yolk Sac tumor and solid teratoma of the ovary: Significance of postoperative serum AFP

Serial serum alpha‐fetoprotein (AFP) was examined postoperatively in five patients with yolk sac tumor and in three with solid teratoma of the ovary. Serial estimation of AFP was also done in sera from postpartum patients to compare the decreasing ratio between the two groups. Serum AFP in these postpartum women decreased according to the exponential function curve as AFP = be−mx(

Oncocytoma of the ovary: Light and electron microscopic study

An oncocytoma of the right ovary in a 22-year-old Japanese woman was examined by light and electron microscopy. The tumor was composed of oxyphilic cells with a granular cytoplasm. Electron microscopic studies revealed mitochondrial hyperplasia, a characteristic feature of the oncocyte . This may be the first report of an oncocytoma in the ovary.