Osteoma differential diagnosis

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: Maria Fernanda Villarreal, M.D. [2]

Differential Diagnosis

Differential Diagnosis	Similar Features	Differentiating Features
Fibrous dysplasia	Benign, often an incidental finding, and affects the same group of patients.	In fibrous dysplasia, differentiating features include: More common presentation is on ribs: 28%, no gender predilection, and complete resection is usually not possible.
Osteoblastoma	Benign, incidental, and male predilection.	In osteoblastoma, differentiating features include: normally affect the axial skeleton, lesions are typically larger than 2 cm, and surgical excision is often the treatment of choice.
Adamantinomas	Benign, slow growing, similar clinical onset.	In adamantinomas , differentiating features include: locally aggressive tumor, common in the 3rd to 5th decades of life, location is usually confined to the jaw.
Chronic sinusitis	Affects same group of population (young to middle aged adults), clinical onset is similar.	In chronic sinusitis, differentiating features include: fever, previous history of acute sinusitis, and lack of facial deformation or imaging findings compatible with osteoma.