【臨床症状】50代 左MMK 全身精査
【問題】どんな正常変異がある?
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▶答えはこちら
- 内臓逆位を認める
- 左乳腺には既知の乳癌の所見は認めない
- また腋窩リンパ節腫大や遠隔転移も認めない
【内臓逆位】
・内臓逆位は3,000~5,000人に1人の割合で認める解剖学的変異
・全てが反転している場合を完全内臓逆位と呼び、一部の臓器のみ反転する部分内臓逆位に分類される
・4:1の割合で完全内臓逆の方が頻度は多い
・内臓が反転しているだけなら病的意義は無いが、血管奇形を伴う場合も多いので注意が必要
・慢性副鼻腔炎、気管支拡張症、内臓逆位の3徴を認める場合は、Kartagener症候群と呼ばれる
・内臓が左右対称に形成されるのは内臓錯位と呼び、無脾症、多脾症を伴う
・内臓錯位は心機能不全など重篤な症状や血管奇形を伴う事もあり、5歳まで生存できるのは5~13%とも言われている
参考文献:ジェネラリストを目指す人のための画像診断パワフルガイド 第2版
金子唯 澤田傑 他:全内臓逆位症と腸回転異常を合併したS状結腸癌の1例 日消外会誌
松川啓義 八木孝仁 他:Kartageber症候群を伴う完全内臓逆位症に対して肝切除を施行した1例 日消外会誌