Objective. The purpose of this study was to evaluate the radiographic findi
ngs of malignant fibrous histiocytoma (MFH) and to discuss the contribution
of these findings to a differentiation of MFH from other malignant tumors
of the head and neck.
Study design. Two cases of MFH of the maxillary sinus affecting the alveola
r bone were evaluated radiographically and scintigraphically.
Results. We reported the following findings, which have only seldom been de
scribed: the presence of fairly well-demarcated bone destruction in the int
raoral radiograph; the relatively smooth surface, uniform density, or no ne
crotic area of the tumor; in computed tomograph images showing the clear se
paration of the tumor from surrounding soft tissues; bone scintigraphs refl
ecting the periosteal reaction to tumor invasion; and lymphoscintigraphy of
the metastatic lymph nodes.
Conclusion. We evaluated the radiographic findings from 2 cases of MFH and
describe findings that may aid in the differentiation of MFH. These radiogr
aphic features may help dentists differentiate MFH from other malignant tum
ors in the head and neck, although MFH is a rare disease and there are no r
adiographic findings that would indicate a specific diagnosis of MFH.