All parts of the jimsonweed plant are poisonous to horses and humans; toxicity is caused by tropane alkaloids. Symptoms of poisoning in horses include a weak, rapid pulse, dilated pupils, dry mouth, incoordination, diarrhea, convulsions, coma, and sometimes death.
Meningioma Causes. The causes of meningioma are not yet fully understood. In fact, several research studies suggest that many meningiomas develop spontaneously, or without a known cause. Sometimes, these tumors can disappear spontaneously as well. Meningiomas, like other solid tumors, develop when healthy cells undergo genetic mutations that cause them to replicate uncontrollably.
About brain tumours. A meningioma is a type of brain tumour that starts in the brain or, occasionally, in the spinal cord. This information describes the causes, symptoms and treatments. It should be read with our general information brain tumours, which has more details about tests, treatments and their side effects.reatment. The main treatments for meningioma are surgery and radiotherapy. Some people have the tumour monitored and delay treatment until it is needed. Your treatment will depend on the size and position of the tumour, your symptoms and general health.