A type of dementia that occurs before the usual age of onset, typically affecting adults in their 40s or 50s.

प्रीसेनाइल डिमेंशिया

English Usage: "The study focused on the onset of presenile dementia in younger populations."

Hindi Usage: "अध्ययन ने युवा जनसंख्या में प्रीसेनाइल डिमेंशिया की शुरुआत पर ध्यान केंद्रित किया।"