This is necrosis of soft tissue caused by obstructed circulation
[DOC] [TLE] gangrene - Memidex dictionary/thesaurus [PAR] localized death of animal soft tissue, caused by prolonged interruption of the 
blood ... [pathology] : necrosis or death of soft tissue due to obstructed circulation,
... [DOC] [TLE] Delayed-type Necrosis after Soft-tissue Augmentation with ... - NCBI [PAR] Delayed-type Necrosis after Soft-tissue Augmentation with Hyaluronic Acid ... of 
product can cause a proportionally greater degree of arterial obstruction), and ... 
and cause necrosis of the nasal ala, which has limited collateral circulation.14-16
... [DOC] [TLE] Vascular Compromise from Soft Tissue Augmentation - NCBI [PAR] Vascular Compromise from Soft Tissue Augmentation.