Yes, It is very right of the patient for their privacy to be respected in all cases. for such its the posting doctor who should be liable if patient files any privacy concern towards the legal department.

So always take your patients concern before sharing their case.

(but what ever knowledge you gain from this portal is given and consumed both by verified medical professionals , so the portal doesnt filter to support the freedom of speech and research of the doctors, so before you implement it should be your own responsibility to cross check it with you own knowledge and risk before implementation.)