the top is gone ......
not sure you can save it - but its worth a try
cut the entire top off ...at the point of where your upper most finger is in the first pic ....adenium are rather easy to cut with a knife, sharp edge or razor ..... after slicing off the top - if you see nothing but white (or green) then its safe to stop ...if you see tan or brown (or black) ...continue taking narrow slices off the top - until nothing but white is showing
allow this cut to callus or harden over ... (about 10 days) ...then repot in a fast draining potting media ...... refrain from watering for another few days ...then saturate the soil - make certain water flows freely out of the pot ..avoid getting any water on the cut surface
then let sit for 45 to 60 days before watering again ...continue with the 45 to 60 day watering schedule until it warms up outside and is a *sustained* 50°F @ night ....
Adenium take forever to respond to changes .... once it warms up outside .... you should see stems starting to sprout from the edges (or just below) of the cut
