Symptoms:

Symptoms vary from person to person, and may include:

• Abdominal pain
• Anxiety
• Black, tarry stools
• Bloated feeling after meals
• Burning, aching, or hunger discomfort in the upper abdomen or lower chest that is relieved by antacids, milk, or food
• Decreased sexual interest, loss of body or facial hair (in men)
• Fatigue
• Headache
• Lack of menstrual periods, infertility, or failure to produce breast milk (in women)
• Loss of appetite
• Loss of coordination
• Loss of underarm or pubic hair
• Mental changes or confusion
• Muscle pain
• Nausea and vomiting
• Sensitivity to the cold
• Unintentional weight loss
• Vision problems
• Weakness

Signs and tests:

Signs may include:

• Coma (if low blood sugar is untreated)
• High blood calcium
• Kidney stones
• Low blood pressure
• Low blood sugar
• Pituitary problems (such as too much prolactin, a hormone that controls breast milk production)

Tests to diagnose MEN I may include:

• Cortisol
• Cranial CT scan
• CT of abdomen
• Fasting blood sugar
• Insulin test
• MRI of the abdomen
• MRI of the head
• Parathyroid biopsy
• Serum adrenocorticotropic hormone
• Serum calcium
• Serum follicle stimulating hormone
• Serum gastrin
• Serum glucagon
• Serum luteinizing hormone
• Serum parathyroid hormone
• Serum prolactin
• Serum thyroid stimulating hormone (rarely used)