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.
Meningioma as a symptom: Conditions listing Meningioma as a symptom may also be potential underlying causes of Meningioma. Our database lists the following as having Meningioma as a symptom of that condition: Chromosome 22 Ring. Hunter-Mcdonald syndrome. Neurofibromatosis syndrome Type II. Neurofibromatosis type 3A.