Abstract
A 57-year-old woman presented with ptosis, diplopia, dysarthria, and gait disturbance was diagnosed with myasthenia gravis (MG) and was admitted to our hospital. MRI for lumber spine evaluation revealed a tumor at the mesentery of the small intestine. Tumorectomy and partial resection of the jejunum were performed as the diagnostic treatment. The tumor was composed of proliferation of CD21-positive spindle cells with intense lymphocytic infiltration. Accordingly, it was diagnosed with follicular dendritic cell sarcoma of the inflammatory pseudotumor-like variant (IPT- like FDCS). IPT-like FDCS is an extremely rare tumor, and predominantly affects the liver and the spleen. There have been no reports on IPT-like FDCS which occurred in the lymph node in the mesentery of the small intestine. Furthermore, the relevance of FDCS and MG has been suggested as the paraneoplastic syndrome recently. Our case in which both diseases occurred concomitantly strongly supports the relevance of both diseases. We report the case of IPT-like FDCS occurred in the lymph node in the mesentery of the small intestine accompanied by MG.
