heterotaxy; situs ambiguus
Medical term for abnormal arrangement of internal organs, distinct from complete situs inversus. Used in clinical contexts.
Heterotaxy is a congenital anomaly in which the positions of organs such as the heart and liver differ from normal.
内臓逆位 (situs inversus) is a complete mirror-image reversal of organs, while 内臓錯位 (heterotaxy) involves a more irregular arrangement.
Compound of 内臓 (internal organs) + 錯位 (displacement, misplacement). The exact historical derivation is uncertain; the term is used in modern medical Japanese.