Is brain tumors soft or hard?

May be either: This can only be determined by the neurosurgeon during brain surgery.

Most are soft: Most but not all primary brain tumors (those formed from cells that belong to the brain) are very soft. They usually contain no bone or cartilage and have very little collagen (fibrous tissue) and are therefore often soft and jelly-like. Rare examples are firmer or hard. Some tumor types, such as meningiomas, may be significantly firm with much collagen or even calcification.

Varies: At the time of surgery, the consistency of the tumor varies depending on the pathologic type and whether or not there are calcifications. This is important as it affects the resectability of the tumor. Primary gliomas (frequently malignant) tend to be soft. Meningiomas or schwannomas, both benign tend to be firm and can often be calcified.