Black and Blue.

The article presents a case study of a 54-year-old man who was immediately assisted by emergency medical services after seeing vomiting black fluid at the park. It states that the patient has undergone series of tests including bronchoscopy, computed tomography and laparotomy with gastrectomy. The potential causes of the endobronchial and oral mucosae's black discoloration are also discussed like extensive exposure to cigarette smoke and ingestion of heavy metals.