Question:

Differential for solitary fibrous tumors in the head and neck include which of the following (all that apply)?
1. Schwanomma
2. Neurofibroma
3. Juvenile nasopharyngeal angiofibroma
4. Fibrous dysplasia
5. Lipoma





Answer:

The correct answers for the question "Differential for solitary fibrous tumors in the head and neck include which of the following (all that apply)?" are:

1. Schwanomma

2. Neurofibroma



Explanation
1. Schwannomas are on the differential for SFT since they are typically well circumscribed, enhancing tumors. [Other tumors on the differential based on the non-aggressive appearance included nerve sheath tumor, neurofibroma, and leiomyoma, although these each have distinct imaging features when considering multiple modalities.]

2. Neurofibromas are on the differential for SFT since they are typically well circumscribed, enhancing tumors.

3. Juvenile nasopharyngeal angiofibromas have an appearance distinct from SFTs. They are heterogeneous, highly vascular, aggressive, ill-defined lesions.

4. Fibrous dysplasia is a primary bone lesion. SFT is a primary soft tissue lesion.

5. Lipomas have an appearance distinct from SFTs. They have fat density on CT, and on MRI have high T1 and high T2 signal with no enhancement.



From the manuscript:
Solitary Fibrous Tumor of the Infratemporal Fossa
Radiology Case. 2014 Dec; 8(12):1-8


This article belongs to the Neuro section.




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From the manuscript

Solitary Fibrous Tumor of the Infratemporal Fossa

Free full text article: Solitary Fibrous Tumor of the Infratemporal Fossa

Abstract
Solitary fibrous tumors represent fewer than 2% of all soft tissue tumors, and only about 12-15% of them occur in the head and neck. We report a case of a 38-year-old male who presented with a six-month history of increasing right cheek swelling. Computed tomography of the paranasal sinuses with contrast demonstrated a well-circumscribed avidly enhancing mass in the right retroantral fat. On magnetic resonance imaging the lesion was homogenously slightly hyperintense to muscle on T1 weighted and T2 weighted images and enhanced avidly with contrast. Surgical resection was performed and pathology was consistent with solitary fibrous tumor. There have been very few reported cases of solitary fibrous tumors in the infratemporal fossa and none described as originating in the retroantral fat.






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