title: 62-Year-Old Man With Back Pain and Lower Extremity Weakness.
authors.affiliation: Resident in Internal Medicine, Mayo School of Graduate Medical Education, Rochester, MN.
authors.forename: Micah D
authors.initials: MD
authors.lastname: Yost
authors.affiliation: Advisor to resident and Consultant in Primary Care Internal Medicine, Mayo Clinic, Rochester, MN.
authors.forename: Laura S
authors.initials: LS
authors.lastname: Greenlund
mesh_terms: D000900:Anti-Bacterial Agents / Q000008:administration & dosage; D003937:Diagnosis, Differential; D006801:Humans; D017116:Low Back Pain / Q000209:etiology*; D035002:Lower Extremity; D008297:Male; D008875:Middle Aged; D018908:Muscle Weakness / Q000209:etiology*; D009494:Neurosyphilis / Q000134:cerebrospinal fluid / Q000175:diagnosis* / Q000188:drug therapy; D010400:Penicillin G / Q000008:administration & dosage
chemical_list: D000900:Anti-Bacterial Agents; D010400:Penicillin G