Elderly female with history of uncontrolled DM presenting with DKA and found to have a cavitary lung lesion found to have biopsy proving broad, aseptate, ribbon like hyphae consistent with mucormycosis. Mucormycosis is a invasive fungal infection (common species include Rhizopus, Mucor species); can cause necrosis of host tissue from invading vasculature. The main risk factor for developing mucormycosis: DM with DKA, steroids, underlying malignancy, AIDS and malnutrition. Most commo presentation of Mucor is rhino-orbital-cerebral mucor and pulmonary mucor. Treatment for our patient included lobectomy and Amphtericin IV prior and post surgery.

Differential for cavitary mass:

• Infection
  • Lung abscess
  • Mycobacteria
  • S. Milleri
  • S. Aureus
  • S. Pyogenes
  • Klebsiella
  • Pseudomonas
  • Tricuspid Endocarditis
  • Lemierre Syndrome
  • Cryptococcus
  • Endemic Mycosis
  • Molds- Mucormycosis
  • Parasites-Paragonimiasis, Entamoeba
• Malignancy
  • Squamous cell carcinoma
  • Mets from GI/GU tumors
  • Lymphoma, Kaposi Sarcoma
• Autoimmune
  • GPA
  • RA
• PE and infarcts