Hemicrania continua for the headache. When the symptoms of hemicrania continua are present, it's considered "diagnostic" if they respond completely to indomethacin. The efficacy of indomethacin may not be long term for all patients, as can eventually become ineffective. The factor that allows hemicrania continua and its exacerbations to be differentiated from migraine and cluster headache is that hemicrania continua is completely responsive to indomethacin. Triptans and other abortive medications do not affect hemicrania continua. In addition to persistent daily headache of HC, which is usually mild to moderate (and frequently severe), HC can present other symptoms. These additional symptoms of HC
Formally étale morphism Formally étale morphism In commutative algebra and algebraic geometry, a morphism is called formally étale if it has a lifting property that is analogous to being a local diffeomorphism. Let "A" be a topological ring, and let "B" be a topological "A"-algebra. "B" is formally étale if for all discrete "A"-algebras "C", all nilpotent ideals "J" of "C", and all continuous "A"-homomorphisms , there exists a unique continuous "A"-algebra map such that , where is the canonical projection. Formally étale is equivalent to formally smooth plus formally unramified. Since the structure sheaf of a scheme naturally carries only the discrete