marsupialize

transitive verb

mar·​su·​pi·​al·​ize

variants or chiefly British marsupialise

mär-ˈsü-pē-ə-ˌlīz 

marsupialized or chiefly British marsupialised; marsupializing or chiefly British marsupialising

: to open (as the bladder or a cyst) and sew by the edges to the abdominal wound to permit further treatment (as of an enclosed tumor) or to discharge pathological matter (as from a hydatid cyst)