Spontaneous Regression of Metachronous Intra-Abdominal Desmoid Tumor in a Patient with Familial Adenomatous Polyposis oleh Kenji Tsuchihashi, Kyoko Yamaguchi, Ryosuke Taguchi, Kenichi Kohashi, Kayo Ijichi, Yuta Okumura, Michitaka Nakano, Akari Ohno, Tomonobu Hioki, Hozumi Shimokawa, Hiroshi Ariyama, Hitoshi Kusaba, Yoshinao Oda, Koichi Akashi, Eishi Baba