Background
Depending on the primary proliferating cell, both malignant and benign skull tumors can be any of the following:
Bone forming
Cartilage forming
Of connective tissue origin
Histiocytic
Of blood or blood vessel origin
Metastatic to bone
Of neuroepithelial origin
Of squamous cell origin
Of apocrine gland (ie, major and minor salivary, lacrimal) origin