The time for brain metastases to become symptomatic mainly depends on the size of the tumor within the skull and brain, and if the tumor grows rapidly, it can be within 1 to 2 weeks that symptoms will appear.
Tumors with brain metastases mainly originate from lung tissue, liver tissue, gastrointestinal tract and other parts of the body, and are mainly transferred through the bloodstream. Some of the tumors grow more rapidly, and clinical symptoms such as headache, nausea, projectile vomiting, epilepsy, hemiparesis of limbs, visual field damage and other symptoms may appear 1 to 2 weeks after brain metastasis.
However, the growth rate of some tumors is slower, and at this time, the tumor volume in the cranium and brain is in a small state for a long period of time, which usually does not cause clinical symptoms, or the symptoms are relatively mild.
If brain metastases occur, one should seek medical treatment in time and follow the doctor’s instructions to actively carry out treatment to relieve symptoms and improve the quality of survival of patients.