Structure which does NOT pass under flexor retinaculum -

Structures superficial to flexor retinaculum         Palmaris longus         Ulnar vessels and nerve         Palmar cutaneous branches of median and ulnar nerves.  Structures deep to flexor retinaculum       Median nerve        Flexor digitorum superficialis        Flexor digitorum profundus        Flexor pollicis longus        Flexor carpi radialis