Table of Contents
Definition / general | Radiology description | Case reports | Treatment | Microscopic (histologic) description | Microscopic (histologic) images | Differential diagnosis | Additional referencesCite this page: Pernick N. Squamous odontogenic tumor. PathologyOutlines.com website. https://www.pathologyoutlines.com/topic/mandiblemaxillasquamousodon.html. Accessed September 27th, 2023.
Definition / general
- Uncommon
- Most common in 20s but occurs in all ages, 2/3 male
- Usually in anterior maxilla or posterior mandible in soft tissue or bone; 25% are multiple lesions
- Arises from rests of Malassez in periodontal ligament
- Low probability of recurrence, no malignant transformation reported
Radiology description
- Well circumscribed
- Semicircular radiolucency
- Sclerotic border
- Near teeth roots
Case reports
- 30 year old woman with an incidental finding during orthodontic treatment (Arch Pathol Lab Med 2001;125:297)
Treatment
- Excision with extraction of involved teeth or en bloc resection
Microscopic (histologic) description
- Anastomosing islands of benign, stratified squamous epithelium within fibrous stroma, often well defined nests with clear cells
- May contain keratin or psammoma bodies
- Often epithelial vacuolization and microcysts
- No atypia, no mitotic figures, no inflammation, no peripheral palisading
Microscopic (histologic) images
Differential diagnosis
- Acanthomatous ameloblastoma: peripheral palisading, stellate reticulum
- Mucoepidermoid carcinoma
- Well differentiated squamous cell carcinoma
Additional references