The disease is called variously Vincent's angina, trench mouth, ulcerated stomatitis, necrotic gingivitis.
But: "The tumor nodule was completely necrotic and virtually replaced by a hemorrhagic effusion," suggesting that, had she been treated earlier, she might have recovered.
One drawback to porphyrins as isotope carriers: they also have an affinity for the necrotic (dead) parts of a cancer, where radioactivity would do little, if any, good.