Benign lesions of mandible – Imaging findings using MDCT with Histo-pathological correlation

Congress:

ECR 2018

Poster Number:

C-2673

Type:

Educational Exhibit

Keywords:

Neoplasia, Infection, Cysts, Computer Applications-Detection, diagnosis, CT, Head and neck

Authors:

R. Gupta¹, S. Kumar¹, P. KUMAR², S. Mukul³, P. BHADANI³, N. SINHA³, A. KUMAR³, N. Nischal⁴; ¹Patna, Bi/IN, ²PATNA, BIHAR/IN, ³PATNA/IN, ⁴New Delhi/IN

DOI:

10.1594/ecr2018/C-2673

DOI-Link:

https://dx.doi.org/10.1594/ecr2018/C-2673

Fig. 1: Radicular cyst- Small well defined cystic lesion at the apex of last molar...

Fig. 2: Dentigerous cyst: 24 years old male. Orthopentogram shows lobulated expansile...

Fig. 3: Dentigerous cyst with ectopic tooth: 26 year old male (a) Volume rendered image...

Fig. 4: Aneurysmal bone cyst: 26 year old male (a) Axial (b) Coronal bone window images...

Learning objectives

Mandibular lesions have a very wide spectrum but overlapping imaging features pose a diagnostic challenge. This exhibit aims to describe the imaging features of the histologically proven benign lesions of the mandible.

Background

Mandibular lesions have odontogenic and non-odontogenic origins. Teeth develop both from ectoderm and mesoderm. Enamel develops from ectoderm of the oral cavity and all other tissues from associated mesenchyme.(1) Odontogenic tumors demonstrate interactions between the odontogenic epithelium and odontogenic ectomesenchyme and are typically subclassified by their tissue of origin. Odontogenic tumors usually involve one tooth or a specific part of the tooth while nonodontogenic lesions have no specific relationship to dentition, hence can involve the bone around two or more teeth.

Findings and procedure details

All suspected patients of Mandibular lesions underwent Computed tomography (CT) FACE on 256 Slice Dual Source SEIMENS CT Scanner. All radiologically diagnosed focal or diffuse suspicious lesions underwent biopsy. All biopsy-proven benign Mandibular lesions were included in this exhibit. WHO histological classification of benign odontogenic tumors Odontogenic epithelium with mature, fibrous stroma without odontogenic ectomesenchyme 1. Ameloblastoma, solid/multicystic type 2. Ameloblastoma, extraosseous/peripheral type 3. Ameloblastoma, desmoplastic type 4. Ameloblastoma, unicystic type 5. Squamous odontogenic tumor 6. Calcifying epithelial odontogenic tumors 7. Adenomatoid odontogenic tumor 8....

Conclusion

History, clinical presentation, and imaging play a key role in the diagnosis of benign lesions of Mandible. Although CT findings may not always provide the confirmatory diagnosis but narrow down the differential diagnosis and provide a definite roadmap to the surgeon.

Personal information

References

1. Peter M. Som. Hugh D. Curtin. Cysts, Tumors, and Nontumorous Lesions of the Jaw. HEAD AND NECK IMAGING, 5th ed. St. Louis: MOSBY Inc; 2011. p. 1476-1546. 2. Gohel A, Dunfee B. Radiologic and Pathologic Characteristics of Benign and Malignant Lesions of the Mandible. RadioGraphics. 2006;26(6):1751–69. 3. Hsu MH, Chiang ML, Chen JK. Unicystic ameloblastoma. J Dent Sci. 2014;9(4):407–11. 4. Singh N, Sahai S, Singh S, Singh S. Calcifying epithelial odontogenic tumor (Pindborg tumor). Natl J Maxillofac Surg. 2011;2(2):225-27. 5. Satishv, Prabhadevi MC, Sharma...