The word hiatus means an interruption, break or gap. It can be a slight pause or a separation. It can be a break or interruption from work. It can be a missing piece.
Another term for diaphragmatic hernia is a hiatal hernia.
Retroperitoneal is the medical term meaning behind the peritoneum. The kidneys and ureters are retroperitoneal.
Hiatus is a Latin word meaning opening, gap or rupture
in. Perhaps it's regional; in the US we say "on hiatus."
The nasopharynx is the space behind the nose.
ABAFT
An abscess behind the tonsils is a retrotonsillar abscess.
Retropharyngeal is the medical term meaning behind the pharynx.
No such specific term and I guess you may call it retro renal
Retropharyngeal is the medical term meaning behind the pharynx, or throat.
export hiatus
Anterior, the front. As opposed to posterior, behind