Can a brain tumor cause photosynthesis (being sensitive to light)?

Plants convert : Carbon dioxide to oxygen using chlorophyl...This is photosynthesis. Photophobia is "light sensitive" or fearing light, and is not specific to brain tumor, common to many, but may occur.

Usually not: Patients with brain tumors usually do not have photosensitivity as a common symptom or complaint. However, if there is direct involvement of the optic apparatus by the tumor, light sensitivity is certainly a possibly. The usual symptoms of a brain tumor are seizure, headaches, weakness, nausea/vomiting.

Possible: Sensitivity to light can be due to meningeal involvement with tumor, usually metastatic tumor.

Yes and no: "photosynthesis" is not something the human body does; it is what green plants do when in sunlight to convert the energy in the light to sugar using carbon dioxide, water, and the special cellular structures called chloroplasts. However, it is certainly possible for some brain tumors to give a patient light sensitivity. There are many other causes of such sensitivity, don't jump to conclusions.