The best replacement for situ is ex situ.

The best alternatives to situ are rated as following:
★★★★★  ex situ
★★★★★  invasive
★★★★  in vivo
★★★  invasive breast cancer
★★  in vitro
★★  in situ
★★  precast concrete
★★  sana
★★  invasive carcinoma
★  invasive cancer
★  mining
★  ex situ conservation
★  ex vivo
★  surface mining
★  precast
★  dcis
★  vivo
★  prefabricated
  invasive breast carcinoma
  vitro
  open pit mining
  dysplastic nevus
  lobular carcinoma in situ
  in-situ
  atypical ductal hyperplasia
  ductal carcinoma in situ
  in loco
  carcinoma

Your alternative for situ is not listed? Suggest!
Speaking about situ, one probably shouldn't forget about microinvasion.

Other search terms related to situ and their ratings are:
★★★★★ microinvasion
You have in mind a companion for situ and it is not yet here? Propose!



Google Trends

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situ
ex situ
invasive