hebephrenia is always a disease of adolescence and never occurs during adult life.
The subjects of hebephrenia are peculiarly liable to tubercular infection and many die of phthisis.
hebephrenia he·be·phre·ni·a (hē'bə-frē'nē-ə, -frěn'ē-ə)
A schizophrenia, usually starting at puberty, characterized by foolish mannerisms, senseless laughter, delusions, hallucinations, and regressive behavior. Also called disorganized schizophrenia, hebephrenic schizophrenia.