Man referred for progressive corneal ulcer

A 75-year-old man was referred by an international ophthalmologist for progressive corneal ulceration and possible endophthalmitis of the right eye.
The patient’s medical history was notable for appendiceal cancer s/p colostomy, cytoreductive surgery with hyperthermic intraperitoneal chemotherapy, splenectomy, retroperitoneal sarcoma, hypertension and hypercholesterolemia. He never had ocular surgery and was not a contact lens wearer. His only allergy was to adhesive materials. Family history was noncontributory. He was a former smoker with a 4.7 pack-year history spanning from