title: Pitfalls in diagnosis: two for rheumatologists.
mesh_terms: D000038:Abscess / Q000209:etiology; D000328:Adult; D000368:Aged; D001799:Blood Sedimentation; D004927:Escherichia coli Infections / Q000209:etiology; D005260:Female; D013700:Giant Cell Arteritis / Q000150:complications / Q000175:diagnosis*; D006801:Humans; D008297:Male; D008875:Middle Aged; D013117:Spinal Cord Compression / Q000209:etiology; D013122:Spinal Diseases / Q000175:diagnosis* / Q000209:etiology; D013166:Spondylitis / Q000209:etiology; D013203:Staphylococcal Infections / Q000209:etiology