Odontogenic cysts and tumors: what radiologists need to know?

Congress:

ECR 2019

Poster Number:

C-0872

Type:

Educational Exhibit

Keywords:

Infection, Cysts, Cancer, Diagnostic procedure, MR, CT, Cone beam CT, Head and neck, Bones

Authors:

J. de Grazia¹, C. A. Robles², G. A. Miranda¹, A. Salas², R. Núñez Flores², C. Matus Yañez², P. Orellana², A. Pontoni², F. LAHSEN²; ¹Santiago, RM/CL, ²Santiago/CL

DOI:

10.26044/ecr2019/C-0872

DOI-Link:

https://dx.doi.org/10.26044/ecr2019/C-0872

Fig. 2: First question: is the lesion related to a teeth? If the answer is no, the...

Fig. 3: Second question: where is the lesion located with respect to the tooth?...

Fig. 4: Third question: how the lesion acts with respect to the neighboring teeth?...

Fig. 5: Fourth question: what is the density of the lesion? Radiolucent (lytic), mixed,...

Learning objectives

To know the 4 basic questions in radiological evaluation of mandibular / maxillary lesions. To review the characteristics of the main cystic and tumoral odontogenic lesions, emphasizing the answer of the 4 basic questions.

Background

Radiologists who report head and neck exams often face mandibular / maxillary lesions, either as the main finding of the examination or as an incidental finding. Many of these lesions are of dental origin, and their nature is varied: cysts of the odontogenic apparatus, neoplasms (benign or malignant), among others. The imaging findings of many of these diseases may be indistinguishable, despite considerable differences in the underlying pathological process, reason why the histological study most of times is required to confirm the diagnosis. In this...

Findings and procedure details

The basic radiological approach to mandibular / maxillary lesions should include 4 questions: 1) Is the lesion related to a tooth? (odontogenic v/s non-odontogenic); 2) Where is the lesion located with respect to the tooth? (periapical v/s pericoronary v/s inter-radicular); 3) How the lesion acts with respect to the neighboring teeth (displacement v/s resorption of the roots); 4) What is the density of the lesion? (radiolucent v/s mixed v/s radiodense). These questions are outlined in Fig. 2, Fig. 3, Fig. 4 and Fig. 5. To...

Conclusion

The role of the radiologist when facing an odontogenic lesion is to narrow the differential diagnosis, characterizing the extent and complexity of the lesion. The diagnostic approach of odontogenic lesions should include answering 4 questions: 1) Is the lesion related to a tooth? (odontogenic v/s non-odontogenic); 2) Where is the lesion located with respect to the tooth? (periapical v/s pericoronary v/s inter-radicular); 3) How the lesion acts with respect to the neighboring teeth (displacement v/s resorption of the roots); 4) What is the density of...

Personal information

Department of Radiology, Universidad de Chile.

References

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