What could this lump be found under my right jaw line after removal of tonsil and twenty-seven lymph nodes removed along with radition chemo?

There are several possibilities for what the lump under your right jawline could be after the removal of your tonsils and lymph nodes, as well as radiation and chemotherapy. It's important to see your doctor for a proper diagnosis and evaluation. Here are a few potential causes:

1. Swollen Lymph Node: Lymph nodes can become swollen or enlarged as part of the body's immune response to infection or other conditions. Despite the removal of lymph nodes during your surgery, there may still be some remaining lymph tissue in the area that could react to stimuli.

2. Scar Tissue: The formation of scar tissue is a natural part of the healing process after surgery. Sometimes, scar tissue can build up and form a noticeable lump or mass.

3. Infection: There's a risk of infection after surgery, especially if there's an open wound or incision site. Infection can lead to the development of an abscess or collection of pus, which could manifest as a lump.

4. Sialadenitis: Sialadenitis refers to the inflammation of the salivary glands. The salivary glands located under the jawline can become inflamed due to various reasons, such as bacterial or viral infections, dehydration, or radiation exposure.

5. Parotid Gland Swelling: The parotid gland is a major salivary gland located on either side of the face, near the jawline. Swelling of the parotid gland can occur due to inflammation, infection, or obstruction of the salivary duct.

6. Cancer Recurrence: Although uncommon, there's a possibility of cancer recurrence after surgery, radiation, and chemotherapy. It's crucial to monitor for signs of cancer recurrence, especially if the lump develops shortly after treatment.

7. Other Medical Conditions: In rare cases, the lump could be a sign of other underlying medical conditions, such as autoimmune diseases, thyroid problems, or cysts.

It's essential to consult your doctor to determine the exact cause of the lump under your right jawline. Your doctor will likely recommend imaging tests, such as ultrasound or CT scans, to obtain more information about the nature of the lump and rule out any serious underlying conditions. If necessary, they may also perform a biopsy to obtain a sample of the tissue for further analysis. Based on the diagnosis, appropriate treatment or management options can be recommended.