What are side effects of a radical neck dissection?

Facial Paralysis and: Facial paralysis and loss of taste sensation and numbness of the face.

List: A radical neck dissection will leave a scar and may be associated with a physical indentation in the neck if muscle is removed. There may be nerve damage leading to neck numbness and paralysis of the trapezius muscle, diaphragm, or arm musculature. There may be facial swelling, bleeding, infection, lymphatic leakage and more.

Several: Some of the risks are pain, bleeding, infection, cosmetic deformity, shoulder weakness (very likely), injury to the motor nerve to your lip, earlobe numbness, lymphatic leakage, and stroke. It is extremely unusual to have complete facial paralysis, arm or diaphragm weakness unless done by someone with little experience.