IMPORTANT: We currently have a number of bugs related to image cropping and are actively trying to resolve them. In the meantime, we have disabled cropping. Apologies for any inconvenience. Stay informed: radiopaedia.org/chat

Solitary plasmacytoma

Case contributed by Prashant Gupta
Diagnosis almost certain

Presentation

Bilateral lower limb tingling since one month, no h/o trauma

Patient Data

Age: 50 years
Gender: Male
mri

Expansile soft tissue lesion involving only the L1 vertebra is iso-hypointense on T1 and hyperintense to muscle on T2.

L1 vertebra

ct

A correlation CT was performed. There is an expansile soft tissue lesion involving only the L1 vertebra. Prominent residual thickened trabeculae are seen giving a "mini brain" appearance.

Case Discussion

Although many vertebral lesions show low signal on t1 with high signal on t2 the "mini brain" sign is considered to be fairly characterestic of a solitary plasmacytoma. Some authors consider it typical enough to forego a biopsy and start treatment 1.

How to use cases

You can use Radiopaedia cases in a variety of ways to help you learn and teach.

Creating your own cases is easy.

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.