Mucormycosis: Difference between revisions
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==See Also== | ==See Also== | ||
*[[Fungal Infections]] | *[[Fungal Infections]] | ||
*[[Antifungals]] | |||
==External Links== | ==External Links== |
Revision as of 03:38, 8 March 2021
Background
- Opportunistic invasive fungal infection, typically affecting immunocompromised patients (especially uncontrolled diabetics)[1]
- Caused by saprophytic fungi (Mucorales)
- Found in soil, bread mold, decaying fruits[2]
- Fungal spores are dispersed in air → route of entry is inhalation[1]
- Infection typically begins in nose and paranasal sinuses
- Can also affect pulmonary, GI and CNS systems
- Mucorales fungi have vascular proclivity, and can cause thrombosis → tissue and bone necrosis
- Prognosis is poor, with 17-51% mortality[3], higher in cerebral involvement[4]
Clinical Types
- 6 clinical types, based on location of infection[1][2]
- Rhino-orbital-cerebral (most common form)
- Pulmonary
- Gastrointestinal
- Cutaneous
- Disseminated
- Miscellaneous
Clinical Features
- Rhinocerebral form initially mimics acute bacterial sinusitis (pain/swelling of cheeks and periorbital region)[2]
- A much more rapid, extensive expansion of the fungus to the surrounding anatomy is classic
- Can spread to orbits, oropharynx, nasopharynx, brain, nearby vasculature leading to → vision changes, nasopharyngeal and oropharyngeal ulceration or eschars, facial edema/pain, cranial nerve deficits, headache
- Black palatal discoloration indicates palatal necrosis
Differential Diagnosis
Rhinorrhea
- Upper respiratory infection, influenza
- Sinusitis
- Juvenile nasopharyngeal angiofibroma
- Nasal polyp
- Nasal mass
- Nasal foreign body
- CSF leak (e.g. basilar skull fracture)
- Toxic inhalation (e.g. selenium toxicity, neurotoxic shellfish poisoning)
Headache
Common
Killers
- Meningitis/encephalitis
- Myocardial ischemia
- Retropharyngeal abscess
- Intracranial Hemorrhage (ICH)
- SAH / sentinel bleed
- Acute obstructive hydrocephalus
- Space occupying lesions
- CVA
- Carbon monoxide poisoning
- Basilar artery dissection
- Preeclampsia
- Cerebral venous thrombosis
- Hypertensive emergency
- Depression
Maimers
- Giant cell arteritis of temporal artery (temporal arteritis)
- Idiopathic intracranial hypertension (Pseudotumor Cerebri)
- Acute Glaucoma
- Acute sinusitis
- Cavernous sinus thrombosis or cerebral sinus thrombosis
- Carotid artery dissection
Others
- Trigeminal neuralgia
- TMJ pain
- Post-lumbar puncture headache
- Dehydration
- Analgesia abuse
- Various ocular and dental problems
- Herpes zoster ophthalmicus
- Herpes zoster oticus
- Cryptococcosis
- Febrile headache (e.g. pyelonephritis, nonspecific viral infection)
- Ophthalmoplegic migraine
- Superior Vena Cava Syndrome
Aseptic Meningitis
- Viral
- Tuberculosis
- Lyme disease
- Syphilis
- Leptospirosis
- Fungal (AIDS, transplant, chemotherapy, chronic steroid use)
- Noninfectious
Evaluation
- Can be clinical diagnosis - early diagnosis is critical to limiting spread of disease
- CT scan of sinuses with IV contrast can assist with diagnosis and surgical planning
- Histopathology is confirmatory
Management
- Emergent ENT consult for OR debridement (definitive treatment)
- Start Amphotericin B 1mg/kg IV[2] OR
- Liposomal Amphotericin B 5-10mg/kg[3]
- Aggressive resuscitation, airway management, and supportive care while in ED.
- Hyperbaric oxygen therapy[4] and iron chelation (iron is required for fungal growth) may also help.[2]
- Do not use deferoxamine (can worsen disease caused by certain fungal genera) - deferiprone is preferred
See Also
External Links
References
- ↑ 1.0 1.1 1.2 Selvamani M, Donoghue M, Bharani S, Madhushankari GS. Mucormycosis causing maxillary osteomyelitis. Journal of Natural Science, Biology, and Medicine. 2015;6(2):456-459. doi:10.4103/0976-9668.160039.
- ↑ 2.0 2.1 2.2 2.3 2.4 Motaleb HYA, Mohamed MS, Mobarak FA. A Fatal Outcome of Rhino-orbito-cerebral Mucormycosis Following Tooth Extraction: A Case Report. Journal of International Oral Health : JIOH. 2015;7(Suppl 1):68-71.
- ↑ 3.0 3.1 Bellazreg F, Hattab Z, Meksi S, et al. Outcome of mucormycosis after treatment: report of five cases. New Microbes and New Infections. 2015;6:49-52. doi:10.1016/j.nmni.2014.12.002.
- ↑ 4.0 4.1 Mohamed MS, Abdel-Motaleb HY, Mobarak FA. Management of rhino-orbital mucormycosis. Saudi Medical Journal. 2015;36(7):865-868. doi:10.15537/smj.2015.7.11859.