A Case of Dental Pain and Altered Mental Status
Contributors: Dillon Warr, MD and Jason Hine, MD
This episode features the presentation of a complex case involving a patient with altered mental status, facial swelling, and dental pain. The discussion highlights key elements of diagnostic reasoning and the importance of maintaining a broad differential when evaluating high-risk patients. The case ultimately underscores the need for vigilance in recognizing rare but life-threatening conditions and using the history, physical, and work-up to nail the diagnosis.
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Summary Points
Rhino-orbital-cerebral mucormycosis
Red Flags: Facial pain, eye involvement, black eschar on palate/turbinates, cranial nerve palsies.
At-Risk Patients: Uncontrolled diabetics (especially in DKA), transplant patients, immunocompromised.
ED Management:
- Early initiation of amphotericin B and ID consultation.
- ENT, ophthalmology, and possibly neurosurgical consultation
- Imaging (CT/MRI) to nail the diagnosis and assess extent of involvement
Disposition: Urgent admission, typically ICU; often requires surgical debridement.
Mucormycosis
Overview
- Rhino-orbital-cerebral mucormycosis (ROCM) is the most frequent and severe form of mucormycosis, especially affecting patients with diabetes and DKA, though it also occurs in transplant recipients and immunocompromised hosts
- Cases typically involve sinuses, extend to the orbit, and can progress to the brain (cerebral involvement), often with devastating outcomes.
Why DKA?
- In DKA, high glucose, acidic pH, and elevated free iron create an ideal environment for the fungus to grow and invade tissue. Impaired neutrophil function further weakens host defenses, allowing rapid angioinvasion and necrosis.
Risk Factors
- Major risk factors include:
- Diabetes, particularly with ketoacidosis.
- Solid organ transplant recipients.
- Neutropenia, hematologic malignancy, steroid/immunosuppressive use
Clinical Features
- Sinus-related symptoms: nasal congestion, epistaxis, facial pain or swelling
- Orbital involvement: proptosis, ophthalmoplegia, decreased vision, ptosis
- Mucosal findings: black eschar or necrotic lesions on palate or nasal mucosa
- Neurologic signs may emerge with cavernous sinus thrombosis or cerebral extension
Diagnosis & Imaging
- Definitive diagnosis requires biopsy demonstrating broad, non‑septate, right‑angle branching hyphae, with culture confirmation when possible.
- MRI with contrast (gadolinium) is the imaging modality of choice to assess soft-tissue, orbital, and cerebral extension. CT helps evaluate bony erosion.
Management
Empiric Antifungal Therapy
- High‑dose liposomal amphotericin B should be initiated immediately upon clinical suspicion, even before biopsy or culture results.
- Second-line or salvage options include posaconazole or isavuconazole, especially when amphotericin is contraindicated or tolerated poorly.
Surgical Debridement
- Aggressive surgical debridement is mandatory—involving sinus drainage and removal of necrotic tissue.
- In advanced orbital or cerebral disease, exenteration of the orbit or neurosurgical intervention may be required. Repeated procedures are often necessary
Adjunctive Therapies
- Other interventions like hyperbaric oxygen, iron chelation (deferasirox), growth factors, or WBC transfusion have been used in selected cases, though evidence remains limited and mixed.
Prognosis
- CNS extension, orbital apex involvement, uncontrolled diabetes, and immunosuppression (especially in transplant recipients) are key predictors of poor outcomes
- Mortality remains high; even with aggressive management, CNS disease significantly worsens prognosis
References
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