My favorite is "idiopathic", but "cryptogenic" is also correct.
Alopecia areata.
In Situ
Origin.originOriginorigin
The medical term for something of cardiac origin is "cardiac." This refers to any condition or symptom that originates from the heart.
Psychogenic means of mental origin or causation
Proximal means nearer the point of origin.
The insertion is the end of the muscle. The origin is the beginning.
Etomology
Epidemiology
Anacusis is the medical term meaning complete deafness.
Syncope is the medical term meaning fainting.
Lamina is the medical term meaning layers.