After my latest neck dissection in late November, and my radiotherapy which finished at the end of February, I've now developed another lump on my collar bone where it joins my sternum.
The biopsy revealed that it contained cancer cells and I had my MRI scan earlier this week. I should get the results after the MDT meeting next week but I know it's in a sensitive position.
This lump is about half the size of a golf ball and quite firm, unlike my other lumps which were all a little softer. The best I think I can hope for is that it's subcutaneous and they can cut it out.
Would appreciate anyone with experience of surgery in this area and the complications if surgery is deep seated.

Sounds like level IV, V or even VI. I assume it's on the right? Do you know it's a metasteses. Level V, VI is unusual, but it happens, and there can be skip metastases or only area left for metastases to go after the MRND, and move downward in the chain. Other type cancers can go up to this area also. I had three neck dissection in the area but the last two wound up not being a lymph node. It was free or roaming cancer, which is not good. Fortunately, surgery was always the easiest part of treatment for me, but with prior surgery, treatment, it is more difficult. Radiation dosage may be limited to the toxicity level of the brachial plexus, nerve, and other structures. Several treatment cancers only wanted to do 50 Gy for the recurrence, but I went with high dose IORT, with another doctor, which included another RND, and radiation similar to brachytherapy, at 15Gy directly on the tumor during surgery, which protects vital structures, and additional chemo and radiation at 50Gy 6 weeks later. He said just doing 50Gy, Chemo would not work, and cancer would likely return. You may want to get other opinions also. Good luck.