Hi, Welcome to icliniq.com. First of all, based on the reports (attachments removed to protect patient identity), the patient is hypovolemic (low BP). He needs a good oral diet and, maybe if required, admission and supportive care in the form of IV (intravenous) fluids. It looks like a recurrent disease in the submandibular nodes. It needs to be evaluated whether the nodal levels were included in the radiation therapy field or not (in-field recurrence vs out-of-field recurrence).
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