congenital central hypoventilation syndrome; CCHS
A rare medical condition present from birth where the autonomic control of breathing is impaired, especially during sleep. Often abbreviated as CCHS in English medical contexts.
Congenital central hypoventilation syndrome is a condition where breathing becomes shallow during sleep.
A compound of medical terms: 先天性 (congenital), 中枢性 (central), 肺胞 (alveolar), 低換気 (hypoventilation), and 症候群 (syndrome). The derivation is straightforward from its components.