The unique appearance of apatite in fungus balls of aspergillosis in the maxillary sinus was investigated using scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), X-ray microdiffraction and Fourier transform infrared spectroscopy (FT-IR). Rod-shaped fragments with tubular structures, and globular vesicles covered with conidia were observed in the fungus balls. Massive fragments of a solid substance were demonstrated inside the fungus balls. Calcium and phosphate were detected in necrotic areas of the fungus balls by EDS. X-ray microdiffraction and FT-IR showed the presence of an apatite-like substance, but failed to demonstrate the presence of calcium oxalate crystals usually found in such fungus balls.
Tanaka, Hidekuni; Sakae, Toshiro; Mishima, Hiroyuki; and Yamamoto, Hirotsugu
"Calcium Phosphate in Aspergillosis of the Maxillary Sinus,"
Scanning Microscopy: Vol. 7
, Article 13.
Available at: https://digitalcommons.usu.edu/microscopy/vol7/iss4/13