Cook noodles according to package directions; drain.
Meanwhile, saute mushrooms in butter or margarine.
Stir in chicken stock base and curry powder; remove from heat.
Add wine; blend in sour cream and 1 cup shredded cheese.
Stir in shrimp, green onions and avocado.
Toss lightly with noodles and turn into buttered 2-quart casserole.
Sprinkle with remaining 1/2 cup shredded cheese.
Bake at 375° 25 to 30 minutes, or until cheese is melted and casserole is bubbly.