Diffusion-weighted magnetic resonance imaging in the characterization of odontogenic cysts and tumors

Mixoma odontogênico e seus diagnósticos diferenciais com base no coeficiente de difusão aparente: relato de caso e breve revisão da literatura

“…7 However, in cases where imaging exams cannot distinguish odontogenic lesions due to similar properties, 5 ADC can be used because each lesion has a different value within a specific numerical range (Table 1). 6 The DWI results and ADC values found in our case report were similar to the ones found in previous studies on OM. 8,9 Keratoc yst is a lesion character ized by anteroposterior growth within the medullary bone.…”

“…4 Radiological and imaging screenings are important to establish the OM diagnosis; however, the characteristics of this lesion vary depending on its stage of development. 6 Several differential diagnoses exist for OM such as dentigerous cyst, ameloblastoma, keratocyst and ameloblastic fibroma. 5,6 In most cases, it is difficult to distinguish OM from ameloblastomas based on radiographic imaging alone; 8 the analysis of MRI resources can be useful to diagnose odontogenic myxoma and differentiate it from other lesions.…”

“…6 Several differential diagnoses exist for OM such as dentigerous cyst, ameloblastoma, keratocyst and ameloblastic fibroma. 5,6 In most cases, it is difficult to distinguish OM from ameloblastomas based on radiographic imaging alone; 8 the analysis of MRI resources can be useful to diagnose odontogenic myxoma and differentiate it from other lesions.…”

“…3,4 The diagnosis is based on the histopathological results, Diffusion Weighted Imaging (DWI) -a form of Magnetic Resonance Imaging (MRI) -is used to distinguish OM from other odontogenic conditions by forming images from the mobility of water in the tissues, promoting a molecular and cyto-architectural visualization of the lesions. [5][6][7] The Apparent Diffusion Coefficient (ADC) is useful to quantify the image of the lesion and its values are inversely proportional to the lesion's cellularity. 5,6 We described a case of odontogenic myxoma and evaluated the effectiveness of ADC values in its diagnosis, comparing them to those of other odontogenic lesions.…”

“…[5][6][7] The Apparent Diffusion Coefficient (ADC) is useful to quantify the image of the lesion and its values are inversely proportional to the lesion's cellularity. 5,6 We described a case of odontogenic myxoma and evaluated the effectiveness of ADC values in its diagnosis, comparing them to those of other odontogenic lesions.…”