Differential diagnosis of hypothermia of extremities

​Differential diagnosis of hypothermia of extremities are : 
-chilblain lupus erythematosus 
-chilblain / erythema pernio 
-acrocyanosis / vasospastic disorders
-thoracic outlet syndrome 
-relfex sympathetic dystrophy 
-polyarteritis nodosa 
-Raynaud’s syndrome 
-cold exposure