This site is targeted at medical and radiology professionals, contains user contributed content, and material that may be confusing to a lay audience. Use of this site implies acceptance of our Terms of Use.

Black turbinate sign

The black turbinate sign refers to an area of non-enhancing mucosa on MRI in a patient with angioinvasive fungal sinus infection.

Mucormycosis is caused by fungi that include MucorRhizopus, and Absidia species.  It is seen in diabetic and immunocompromised patients.

Fungal spores germinate to form angioinvasive hyphae that cause infarction of the surrounding tissue and invade the nasal mucosa.

The invaded tissue is nonenhancing on contrast-enhanced MR imaging and may show diffusion restriction. Non infarcted sinusitis shows T1 post contrast enhancement of the mucosa.

This sign is important for the early detection of mucormycosis so treatement may be initiated to reduce the chance of blindness and death which may occur within 2 weeks if left untreated.

See also

Updating… Please wait.
Loadinganimation

Alert_accept

Error Unable to process the form. Check for errors and try again.

Alert_accept Thank you for updating your details.