This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
All of the following malignancies metastasize except 
Select and explain. 
A. Basal cell carcinoma, B. Adenocarcinoma, C. Squamous cell carcinoma, D. Melanoma
A: Basal cell carcinoma
Answer: A: Basal cell carcinoma 
Explanation: None