i have a small pea sized lump on the back of my neck in the center of my neck about an inch and a half below my hairline. ive had this lump for over 10 years. it is small non growing and hard, i remember when i was a about 17 when it first appeared and i popped it, white smelly stuff came out but since it has gotten hard, its still the same size. my question is, if you have a small hard lump that does not grow, can it be cancer.