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Mucormycosis — Clinical Guidelines

Overview

Mucormycosis is a life-threatening fungal infection caused by fungi of the order Mucorales, predominantly affecting immunocompromised individuals, diabetics, and those with iron overload. It can involve multiple organ systems with high mortality rates despite treatment. 3

Diagnosis

Clinical Presentation: Often seen in immunocompromised patients, diabetics, and those with hematological malignancies.

Laboratory Tests: Mucorales qPCR on blood or serum can aid in early detection and prognosis in high-risk patients 1.

Imaging: CT and MRI may show characteristic findings depending on the site of infection.

Histopathology: Identification of broad, non-septate hyphae is crucial for diagnosis.

Culture: Definitive diagnosis often requires fungal culture, though results can be delayed.

Disseminated Disease: May present with multiple subcutaneous nodules, gastrointestinal involvement, or renal failure 2 7 14.

Management

First-Line Therapy: Liposomal amphotericin B at ≥5mg/kg/day 3.

Adjunctive Treatments: Surgical debridement is recommended whenever possible 3 5.

Alternative Antifungals: Isavuconazole and posaconazole (both intravenous and oral formulations) are considered 3.

Early Aggressive Approach: Essential for disseminated cases, including surgical intervention and broad-spectrum antifungal coverage 8 12.

Monitoring: Close monitoring for hemodynamic instability and multi-organ dysfunction.

Combined Therapy: In severe cases, combination antifungal therapy may be considered 12.

Special Populations

Immunocompetent Individuals: Intestinal mucormycosis can occur rarely in immunocompetent patients 4.

Pediatrics: Primary cutaneous mucormycosis involving the scalp is extremely rare in children 9.

Pregnancy: No specific data provided in the abstracts.

Elderly: Increased susceptibility due to comorbidities like diabetes and immunosuppression 7 17.

Comorbidities: Patients with hematological malignancies, organ transplants, and diabetes are at higher risk 3 16.

Key Recommendations

Screen High-Risk Patients: Use Mucorales qPCR twice weekly to screen high-risk hematology patients for early detection and improved survival 1 (Evidence: Moderate).

First-Line Antifungal Therapy: Initiate liposomal amphotericin B at ≥5mg/kg/day as first-line treatment 3 (Evidence: Strong).

Surgical Intervention: Combine antifungal therapy with surgical debridement for better outcomes 3 5 (Evidence: Moderate).

Aggressive Management of Disseminated Cases: Early aggressive surgical and medical management is crucial for disseminated mucormycosis 8 12 (Evidence: Weak).

Monitor for Multi-Organ Involvement: Closely monitor for systemic complications including renal failure and cerebral involvement 14 18 (Evidence: Weak).

References

1 Bellanger AP, Gbaguidi-Haore H, Berceanu A, Gouzien L, El Machhour C, Bichard D et al.. Use of the Mucorales qPCR on blood to screen high-risk hematology patients is associated with better survival. Medical mycology 2024. link 2 Taweesuk A, Chongtrakool P, Sitthinamsuwan P, Phoompoung P. Hematogenous dissemination of pulmonary mucormycosis manifested as multiple subcutaneous nodules: a case report and review of the literature. BMC infectious diseases 2022. link 3 Brunet K, Rammaert B. Mucormycosis treatment: Recommendations, latest advances, and perspectives. Journal de mycologie medicale 2020. link 4 Wotiye AB, Ks P, Ayele BA. Invasive intestinal mucormycosis in a 40-year old immunocompetent patient - a rarely reported clinical phenomenon: a case report. BMC gastroenterology 2020. link 5 Karaaslan E. Anesthetic management of rhinoorbitocerebral mucormycosis; Focus on challenges. Journal de mycologie medicale 2019. link 6 Requena L, Sitthinamsuwan P, Santonja C, Fernández-Figueras MT, Rodríguez-Peralto JL, Argenyi Z et al.. Cutaneous and mucosal mucormycosis mimicking pancreatic panniculitis and gouty panniculitis. Journal of the American Academy of Dermatology 2012. link 7 Lalwani S, Govindasamy M, Gupta M, Siraj F, Varma V, Mehta N et al.. Gastrointestinal mucormycosis--four cases with different risk factors, involving different anatomical sites. Indian journal of gastroenterology : official journal of the Indian Society of Gastroenterology 2012. link 8 Alvi AR, Shamsi G. Rhizopus necrotizing fasciitis of caesarean wound - a rare life threatening condition. Journal of the College of Physicians and Surgeons--Pakistan : JCPSP 2009. link 9 Koklu E, Akcakus M, Torun YA, Tulpar S, Tasdemir A. Primary gangrenous cutaneous mucormycosis of the scalp in a child: a case report. Pediatric emergency care 2008. link 10 Nichol PF, Corliss RF, Rajpal S, Helin M, Lund DP. Perforation of the appendix from intestinal mucormycosis in a neonate. Journal of pediatric surgery 2004. link 11 Jacobs P, Wood L, Du Toit A, Esterhuizen K. Eradication of invasive mucormycosis--effectiveness of the Echinocandin FK463. Hematology (Amsterdam, Netherlands) 2003. link 12 Leleu X, Sendid B, Fruit J, Sarre H, Wattel E, Rose C et al.. Combined anti-fungal therapy and surgical resection as treatment of pulmonary zygomycosis in allogeneic bone marrow transplantation. Bone marrow transplantation 1999. link 13 Ismail MH, Hodkinson HJ, Setzen G, Sofianos C, Hale MJ. Gastric mucormycosis. Tropical gastroenterology : official journal of the Digestive Diseases Foundation 1990. link 14 Gupta KL, Joshi K, Pereira BJ, Singh K. Disseminated mucormycosis presenting with acute renal failure. Postgraduate medical journal 1987. link 15 Donaldson IM, Parkin PJ. Cerebral mucormycosis. The New Zealand medical journal 1984. link 16 Myskowski PL, Brown AE, Dinsmore R, Kiehn T, Edwards F, Wong B et al.. Mucormycosis following bone marrow transplantation. Journal of the American Academy of Dermatology 1983. link70115-5) 17 Connor BA, Anderson RJ, Smith JW. Mucor mediastinitis. Chest 1979. link 18 Dansky AS, Lynne CM, Politano VA. Disseminated mucormycosis with renal involvement. The Journal of urology 1978. link57455-8)

Mucormycosis