Affiliation: | (1) Department of Radiology, Tama-Nagayama Hospital, Nippon Medical School, 1–7-1 Nagayama, Tama-shi, Tokyo 206–8512, Japan, JP;(2) Department of Obstetrics and Gynecology, Tama-Nagayama Hospital, Nippon Medical School, 1–7-1 Nagayama, Tama-shi, Tokyo 206–8512, Japan, JP;(3) Department of Radiology, Nippon Medical School, 1–1-5 Sendagi, Bunkyo-ku, Tokyo 113–8603, Japan, JP;(4) Department of Pathology, Nippon Medical School, 1–1-5 Sendagi, Bunkyo-ku, Tokyo 113–8603, Japan, JP |