medical record vs case history

medical record and case history both are nouns.

Word	Noun	Adjective	Verb	Adverb
medical record	Yes	No	No	No
case history	Yes	No	No	No

As nouns, case history is a hypernym of medical record; that is, case history is a word with a broader meaning than medical record:

medical record: the case history of a medical patient as recalled by the patient
case history: detailed record of the background of a person or group under study or treatment

medical record (noun)	case history (noun)
the case history of a medical patient as recalled by the patient	detailed record of the background of a person or group under study or treatment