Abstract
Paraneoplastic syndromes (PNS) refer to a phenomenon whereby certain malignancies manifest as symptoms not directly related to the tumor itself. PNS has been described in association with Hodgkin lymphoma (HL) in adults and children and may affect a number of organ systems. The pathophysiology is variable and in many cases is not well understood. Specific paraneoplastic antibodies have been isolated in some syndromes, though are not required for the diagnosis. The two best described for HL are the anti-Tr and anti-mGluR5 antibodies identified in some cases of limbic encephalitis and cerebellar degeneration respectively. A high index of suspicion for underlying malignancy is necessary when recognizing these clinical syndromes to avoid a diagnostic delay. Successful treatment of the HL often reverses the manifestations of PNS although organ function at diagnosis may limit therapeutic options. Some patients suffer devastating complications of their PNS.
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