Regionally Metastatic Merkel Cell Carcinoma Associated with Paraneoplastic Anti-N-methyl-D-aspartate Receptor Encephalitis

Table 2

Autoimmune paraneoplastic syndromes associated with Merkel cell carcinoma.

Reference(s)	Symptoms/syndrome	Autoimmune antibodies
Lopez et al. [21]	Painless proximal muscle weakness	Anti-Hu/ANNA-1 antibodies
Balegno et al. [22]	Paraneoplastic cerebellar ataxia	Antibodies against cerebellar nerve fibers
Greenlee et al. [23]	Sensorimotor and autonomic neuropathy, encephalopathy	Anti-Hu/ANNA-1 antibodies
Cher et al. [24]	Paraneoplastic brainstem encephalitis	Antibodies against brain and cerebellum filamentous structures
Eggers et al. [25], Nguyen et al. [26], and Iyer et al. [27]	Lambert-Eaton myasthenic syndrome	Antibodies against VGCCs
Sharobeam et al. [28]	Subacute cerebellar degeneration	Anti-Hu/ANNA-1 antibodies
Zhang et al. [29]	Paraneoplastic cerebellar degeneration	Antibodies against VGCCs
Hocar et al. [30]	Severe necrotizing myopathy	Anti-Hu/ANNA-1 antibodies
Current case	Expressive aphasia, altered mental status, memory loss, seizures/NMDAR encephalitis	Anti-NMDAR antibodies