Mycobacterial disease causing chylous effusions in two patients living with uncontrolled HIV.

Chylous effusions are a rare complication of disseminated non-tuberculous mycobacterial (NTM) infection. This is a case couplet reporting on the treatment challenge of chylous effusions secondary to NTM infection in two individuals living with advanced HIV. Their treatment was complicated by associated immune reconstitution inflammatory syndrome. They both required intermittent paracentesis, steroid treatment and transitioning on to fat-free diets alongside NTM treatment. Only after months of this treatment regimen was successful resolution of the associated chylous effusions achieved. Chylous effusions in immunosuppressed patients living with NTM infection are rarely reported and difficult to manage. This report discusses treatment approaches and highlights the difficulties faced by the treating team.

Tracheocarotid artery fistula in a patient who had tracheostomy successfully treated with a saphenous vein graft.

Tracheoarterial fistula is a complication of tracheostomy with a high associated mortality. A 25-year-old male patient with Duchenne's muscular dystrophy underwent a percutaneous tracheostomy using the single tapered dilator (Blue Rhino) technique to facilitate weaning from mechanical ventilation. Nine weeks after the procedure, he developed significant upper airway bleeding, leading to haemodynamic instability. A CT angiogram of the neck and thorax did not reveal a source of the bleeding. The patient was subsequently transferred to the operating theatre where a 1 cm defect in the right common carotid artery was found and repaired with a graft from the left short saphenous vein. Clinicians who undertake tracheostomy formation should be aware of the possibility of tracheoarterial defect and may wish to discuss it at tracheostomy formation. It should be considered early in the event of a significant bleed. This case identifies deep tissue infection and misplacement of the tracheostomy tube as major contributing factors to fistula formation.