This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Breast, Subject name: Surgery
Pain along medial aspect of arm in a post - mastectomy patient is due to: 
Select and explain. 
A. Phantom breast pain, B. Intercostobrachial neuralgia, C. Neuroma pain, D. Other nerve injury pain
B: Intercostobrachial neuralgia
Answer: B: Intercostobrachial neuralgia 
Explanation: Four Pain Syndromes have been Distinguished: Phantom Breast Pain: Painful (often knife like or shooting) sensation that the removed breast is still present Intercostobrachial neuralgia: Usually known as post-mastectomy pain syndrome (PMP), consists of pain in axilla, medial upper arm and anterior chest wall and is often is caused by nerve damage during axillary node dissection. Neuroma Pain: Can occur from scars from either mastectomy or lumpectomy but is more common if surgery is followed by radiotherapy. Other Nerve Injury Pain: Can occur even if intercostobrachial nerve is spared and is more common in breast reconstruction and implants.