Solitary plasmacytoma

Case contributed by Prashant Gupta


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

Patient Data

Age: 50 years
Gender: Male

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

L1 vertebra


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.

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