Could numbness in the right arm be cancer?

It's not cancer. The reason of numbness of the right arm may be related to the following factors: first, vascular factors, when the ulnar artery and radial artery of the right upper limb are compressed, it may cause numbness of the right arm. Second, consider nerve factors, such as the radial nerve, ulnar nerve and median nerve of the right upper limb, which all start from the cervical spinal canal, pass through the joint ligament and bone fiber tube, and when the nerve is compressed at any part, it will show numbness of the right arm. third, it is possible that cerebrovascular disease can show that possibility of numbness of the right arm. fourth, patient with hyperlipidemia, long-term high blood lipids, cause hardening of the vascular wall, coupled with viscous blood, slow blood flow velocity, can cause numbness of the right arm. fifth, it is possible to consider diabetic patients, diabetic complication, peripheral neuritis. sixth, it is possible to consider numbness of the right arm caused by cervical spondylosis.