Malignant Carcinoid Syndrome     Malignant carcinoid syndrome is more common in individuals who have had carcinoid tumors for many years. Approximately 60% of people with carcinoid tumors ultimately develop carcinoid syndrome   The ”Flushing zebra” is symbolic of what many of us who have malignant carcinoid syndrome go through and feel like many days of our lives.  To understand this, you first must understand the symptoms of carcinoid syndrome.   People with carcinoid syndrome often experience the following symptoms. Sometimes people with carcinoid syndrome do not show any of these symptoms.  Or, these symptoms may be similar to symptoms of other medical conditions.  If you are concerned about a symptom on this list, please talk to your doctor.   Be aware that stress, strenuous exercise, and drinking alcohol may worsen these symptoms.   Note: Those symptoms listed below that have an active “button” may be selected to obtain more detailed information   Flushing Diarrhea Asthma/Dyspnea Low blood pressure Fatigue Wheezing Myopathy (Muscle Weakness) Arthritis Arthralgias (Joint Pain) Secondary Diabetes High blood pressure Neurosis and psychosis Palpitations Asthenia (Weakness) Changes in Mental State Abdominal Cramping Dizziness