Mucormycosis Clinical Presentation
- Author: Nancy F Crum-Cianflone; Chief Editor: Burke A Cunha, MD more...
History and Physical Examination
Manifestations of mucormycosis depend on the location of involvement.
Rhinocerebral disease
Rhinocerebral disease may manifest as unilateral, retro-orbital headache, facial pain, numbness, fever, hyposmia, and nasal stuffiness, which progresses to black discharge. Initially, mucormycosis may mimic sinusitis.[8]
Late symptoms that indicate invasion of the orbital nerves and vessels include diplopia and visual loss (see the following image). These late symptoms indicate a poor prognosis and are usually followed by reduced consciousness. Most patients with rhinocerebral disease have diabetes (especially with ketoacidosis) or have malignancies in combination with neutropenia and who may be receiving broad-spectrum antibiotics.
An immunocompetent man who sustained a high-pressure water jet injury, resulting in rhinocerebral mucormycosis. Traumatic inoculation of Apophysomyces elegans was the pathogenetic mechanism. A surgical field of this patient is shown. Excision of the right orbit, maxillary antrum, nasal cavity, sphenoid sinus, and infratemporal fossa has taken place. The tissue was infarcted. (Courtesy of A. Allworth, MD, Brisbane, Australia.) Orbital swelling and facial cellulitis are progressive. Black pus discharges from the necrotic palatine or nasal eschars. Necrotic eschars can be noted in the nasal cavity, on the hard palate, or as facial lesions; although these lesions are suggestive of mucormycosis, their absence does not exclude the possibility of this disease.
Proptosis, ptosis, chemosis, and ophthalmoplegias indicate retro-orbital extension. Cranial nerves V and VII are the most commonly affected. Loss of vision can occur with retinal artery thrombosis.
A reduced conscious state denotes brain involvement.
Pulmonary disease
Pulmonary mucormycosis manifests nonspecifically as fever, dyspnea, and cough. Hemoptysis may occur in the presence of necrosis. Most patients with pulmonary disease have malignancies and a history of neutropenia. Pulmonary disease frequently occurs with concurrent sinus involvement.
The signs of pulmonary disease are nonspecific. Fevers are often noted. The lung examination may reveal decreased breath sounds and rales.
Cutaneous disease
Cutaneous disease manifests as cellulitis, which progresses to dermal necrosis and black eschar formation. The progressive black necrotic lesion of cutaneous mucormycosis reflects the vessel invasion characteristic of all forms of the disease.
Patients with skin disease may have had previous trauma or have been exposed to contaminated medical equipment, such as bandages. Rare cases have occurred at catheter sites or insulin or drug-use injection sites.
Gastrointestinal
Gastrointestinal (GI) mucormycosis usually affects severely malnourished individuals. Some case reports have described GI mucormycosis in transplant patients (eg, renal transplant). This infection may occur throughout the GI tract but most commonly affects the stomach, ileum, and colon. Again, the presentation is nonspecific, with abdominal pain, distention, nausea, and vomiting. Hematochezia may occur. Some patients have tenderness to palpation or a mass; rupture may lead to signs of peritonitis.
Central nervous system
Central nervous system (CNS) disease manifests as headache, decreasing consciousness, and focal neurologic symptoms/signs, including cranial nerve deficits. Patients with CNS involvement may have a history of open head trauma, intravenous drug use, or malignancy.
Disseminated disease
Other disseminated forms of mucormycosis may involve the kidneys, bones, and heart, with symptoms attributed to these organ systems. Peritonitis in the setting of continuous ambulatory peritoneal dialysis has also been described.[9]
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