Rapidly progressive dementias (RPDs) are dementias that progress quickly , typically over the course of weeks to months, but sometimes up to two to three years.
Ngwa ngwaọganihu dementias (RPDs) na-aga n'ihu bụ nkwarụ naọganihu ngwa ngwa, nke na-abụkarị izu na ọnwa, mana oge ụfọdụ ruru afọ abụọ ruo atọ.