thanks for your query.
i think you must take a 2nd opinion from a dermatologist
if at all its a fungal infection
and not responding to pulse itraconazole
and terbenafine then if possible biopsy of that lesion is to be done and sent it for fungal culture and drug sensitivity testing because drug resistance
is now on increasing incidence even in cases of fungal elements. i think it will solve your problem best.
dont be furstrated. do what i m advising. first you should consult another dermatologist for that.
god bless you.