Imaging Sci Dent.  2018 Jun;48(2):127-129. 10.5624/isd.2018.48.2.127.

Osseous metaplasia showing heterotopic ossification in the maxillary sinus

• Kang SH
• Chang JH

• KMID: 2413924
• DOI: http://doi.org/10.5624/isd.2018.48.2.127

Abstract

Radiopacity in the maxillary sinus can be observed in various conditions, such as in the presence of lesions in the maxillary sinus or as a sequela of maxillary sinus surgery. This report describes the case of a 57-year-old female patient who had no previous history of surgical treatment or traumatic injury of the nose or maxillary sinus. Both maxillary sinuses were indistinguishable on panoramic radiography and showed signs of radiopacity. Computed tomography images revealed that the maxillary sinuses were filled with bony tissue and exhibited signs of sinus mucosal thickening. Biopsy results showed fragments of trabecular bone with fibrous tissue.

Keyword

Maxillary Sinus; Metaplasia; Osteogenesis

MeSH Terms

Biopsy
Female
Humans
Maxillary Sinus*
Metaplasia*
Middle Aged
Nose
Ossification, Heterotopic*
Osteogenesis
Radiography, Panoramic

Figure

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  Fig. 1 Panoramic image showing the indistinguishable maxillary sinuses that both exhibited signs of radiopacity.

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  Fig. 2 Axial computed tomography images show dense calcifications within both maxillary sinuses, especially the left maxillary sinus, and loss of sinus cavity volume. A. A dense calcified radiopacity with mucosal thickening in the floor of the maxillary sinus. B. A dense, irregular, relatively well-defined, calcified radiopacity attached to the maxillary sinus wall.

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  Fig. 3 Coronal computed tomography images show dense calcifications within both maxillary sinuses, especially the left maxillary sinus. A. A dense calcified radiopacity with mucosal thickening in the floor of the maxillary sinus and loss of sinus cavity volume. B. A dense, relatively well-defined, calcified radiopacity attached to the maxillary sinus wall and a more or less homogeneous radiopacity extending from the maxillary sinus lateral wall, with an especially filled area in the left maxillary sinus.

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  Fig. 4 Histopathological images of the left maxillary sinus region show trabecular bone and fibrous tissue (H&E stain, original magnification: A. ×100, B. ×200, C. ×400. A and B. The slides show lamellar bone with fatty bone marrow and focal fibrosis of the marrow. C. The image shows lamellar bone tissue formation with osteocytes and lamellae.

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