TABLE 1.

Serum and Infectious and Cerebral Spinal Fluid Studies of Diagnostic Workup

Serum studies	White blood cells, 3500/μL (L) mild monocytosis (17%)
	Platelets, 89,000/μL (L)
	Aspartate transaminase, 149 IU/L (H)
	Alanine aminotransferase, 294 IU/L (H)
	Alkaline phosphatase, 233 IU/L (H)
	Total bilirubin, 2.1 mg/dL (H)
	Westergren red blood cells sedimentation rate, 20 mm
	C‐reactive protein, 1 mg/dL
	Serum protein electrophoresis with few tiny oligoclonal bands in gamma region
	Vitamin B12, 884 pg/mL
	IgA, 214 mg/dL; IgM, 71 mg/dL; IgG, 1194 mg/dL
	Thyroid stimulating hormone, 1.83 mIU/L
	Paraneoplastic autoantibody panel negative
	Chromogranin‐A, 403 ng/mL (ULN <93 ng/mL)
	Carcinoembryonic antigen, 36 ng/mL (ULN <3 ng/mL)
Infectious studies	Severe acute respiratory syndrome coronavirus 2 negative by nasopharyngeal swab PCR
	Human immunodeficiency virus negative
	Epstein‐Barr virus negative
	Cytomegalovirus negative
	Fungal cultures negative
	Aerobic cultures negative
	Rapid plasma reagin nonreactive
	QuantiFERON‐TB‐Gold (University of Michigan, Ann Arbor, MI, USA) negative
	Blood culture negative
	Gastrointestinal pathogen panel stool PCR negative
	Urine culture
Cerebral spinal fluid studies	Red blood cells, 2 cells/cmm
	White blood cells, 1 cell/cmm
	Protein, 107 mg/dL (H)
	Glucose, 87 mg/dL (H)
	HSV DNA by PCR negative
	Cryptococcus Ag negative
	Fungal cultures negative
	Aerobic cultures negative
	Acid‐fast bacteria culture negative
	Flow cytometry negative for atypical or malignant cells
	Cytology negative for carcinoma

Abbreviations: H, High; L, Low.