Few common ones are:: Lipoma, a fatty tumor; Sebaceous cyst; A hematoma/Seroma: (collection of some blood/ serum). Etc. Lipomas are commonest at the back of the neck region.
Answered 9/29/2016
3.6k views
Prob. cyst: Most likely a sebaceous cyst or lipoma. Ganglion rare in this location See dermatologist
Answered 3/9/2015
3.6k views
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