Intercostal nerve neurilemmoma
Intercostal nerve neurilemmomas, also known as intercostal nerve schwannoma or neurinoma, are nerve sheath encapsulated tumors affecting intercostal nerves.
Please refer to the article on schwannomas for a broad discussion about these tumors.
They account for <10% of primary neural tumors that arise in the chest (majority arise from the mediastinum ). They occur commonly occur between 20 and 50 years of age .
Most patients tend to be asymptomatic as lesions are slow-growing . Some patients may have pain .
Please refer to the general article on schwannomas.
Lesions are usually solid well-circumscribed masses with homogeneous contrast enhancement. They are usually single but can rarely be multiple .
Solid nodules iso to slightly hyperdense showing homogeneous enhancement.
- T1: iso or slightly hyperintense compared to the adjacent muscles
- T2: hyperintense compared to the adjacent muscles
- T1 C+ (Gd): homogenous contrast enhancement
History and etymolgoy
Neurilemmoma is derived from the Greek word eilēma meaning covering, translating to "nerve covering mass".
On imaging consider localized pleural masses including: