Hello, I have had a persistent lump on my neck which is around the size of a pea for over 4 weeks now. It is firm and moveable. My doctor is concerned it may be a lymphoma so I'm waiting on an ultrasound scan. When it developed it has a scaly white rash. It is not itchy or red. Just uneven, however as time is progressing it seems to be spreading. Should I be worried this is even more of an indication that it may be cancer? It is only around my lump no where else. Would really appreciate anyone's experience of this or advice. 
 

thank you very much.