A 35-year-old lady presented to the emergency department for progressive dyspnea. She had a medical history of pseudosyncope and heroin abuse. Two days prior before presentation she had a history of throat tightness.

Physical examination Blood pressure 190/100 Temperature 96.8 o F Pulse 118 beats/minute Pupils sluggishly reactive to light 2-3 cms sized lesions present on right hip  Biochemical Investigations WBC 18.3 x 10 4 per microliter (μl) of blood Hemoglobin 13.0 Platelets 53 x 10 4 per microliter (μl) of blood Urine toxicology – positive for opioids What is the probable diagnosis? Click here for the answer *This patient case is from Docplexus Editorial Team for educative purpose only. Source: Case Reports in Critical Care