A High ESR with New Headache or Shoulder Stiffness
In someone over 50, this combination is giant cell arteritis until proven otherwise, and the reason it is treated as urgent is that the vision loss it causes is sudden, painless and permanent. Treatment is started on suspicion, before any biopsy, because waiting for confirmation is how sight is lost.
The pattern on your report
- ESR High · marked Key
- CRP High · marked Key
- Hemoglobin Low Supporting
- Platelets High Supporting
Printed as: CRP in mg/Lor mg/dLESR in mm/hr— One notation. The expected value rises with age, though in this condition the result is usually far above even the age-adjusted figure.Hemoglobin in g/Lor g/dLPlatelets in x10^9/Lor x10^3/uL
Why the numbers look like this
Giant cell arteritis inflames the walls of medium and large arteries. An inflamed wall swells inward, and the vessels serving the scalp, the jaw muscles and the optic nerve head are narrow enough that the swelling can shut them. Jaw ache that builds with chewing is a muscle running short of blood; the feared event is the artery feeding the optic nerve closing, which is why the vision loss is sudden, painless and permanent.
The same arterial inflammation pours out interleukin-6, which is why the ESR and CRP run so high, and why the panel shows the by-products of sustained inflammation: a drifting-down hemoglobin and a raised platelet count. Polymyalgia rheumatica sits on the same disease spectrum, which is why girdle stiffness and this blood picture travel together.
Not being flagged is not the same as normal
The expected ESR rises with age, so an age-adjusted reading matters for most purposes; in this condition the result is usually far above even the age-adjusted figure. The reverse caution matters more: a small minority of confirmed arteritis runs with unimpressive markers, so symptoms in the right pattern outrank a reassuring number, in both directions.
What else on the report can hide this
CRP and the platelet count corroborate the ESR, and three raised markers together are harder to dismiss than one. The most discriminating information is not on the panel: jaw pain on chewing, scalp tenderness and any visual symptom, each asked about by name. A response to steroids within days is itself part of the picture in polymyalgia, though it is read carefully, since other conditions also feel better on steroids.
What usually causes it
Listed from most to least common — not from most to least serious.
- Very common
Giant cell arteritis — in people over 50
New headache, scalp tenderness, jaw pain on chewing, or visual symptoms. Treatment starts on suspicion because the vision loss it causes is permanent.
- Very common
Polymyalgia rheumatica — in people over 50
Shoulder and hip girdle pain and stiffness, worst in the morning and lasting more than an hour, with a dramatic response to low-dose steroids. Overlaps substantially with the arteritis.
- Common
Infection
Endocarditis, an abscess, tuberculosis or a chronic urinary infection. Fever and a source, and a raised white cell count more often than in the arteritis.
- Common
Malignancy
Lymphoma, myeloma or a solid tumor. Weight loss, night sweats, or a widened globulin gap. Considered when steroids do not produce the expected response.
- Uncommon
Another vasculitis or connective tissue disease
ANCA-associated vasculitis, lupus or rheumatoid arthritis. Rash, kidney involvement, or specific antibodies.
- Uncommon
Cervical spine disease or shoulder pathology
Explains the stiffness without explaining the inflammatory markers. Both can coexist, which is why the markers matter.
- Uncommon
Drug-induced myalgia
Statins in particular. The CK is often raised, and the inflammatory markers usually are not.
What is usually checked next
- Immediate clinical assessment, with treatment started on suspicion The one that matters. Steroids are begun before confirmation because sight lost is not recovered, and the tests below happen alongside rather than before.
- Temporal artery ultrasound, or biopsy Confirms the diagnosis. Both remain informative for a week or two after steroids start, so treatment should not wait for them.
- CRP with the ESR, and a full blood count Supports the picture and gives a baseline for following the response to treatment.
- A specific history of jaw, scalp and visual symptoms The most discriminating information available, and it is often not volunteered without being asked for by name.
- Liver panel, including alkaline phosphatase Raised in a proportion of cases, and knowing that prevents the investigation being diverted toward the liver.
When to seek care sooner
- Emergency Any loss of vision, or vision that goes and returns
- Emergency Double vision
- Emergency New headache with scalp tenderness in someone over 50
- Emergency Jaw or tongue pain that builds while chewing and eases with rest
- Emergency Sudden weakness on one side, or slurred speech
- Same day Shoulder and hip stiffness lasting more than an hour each morning
Questions worth bringing to your appointment
- Should treatment start today rather than waiting for a biopsy?
- I have had brief episodes of vision going. Does that change the urgency?
- Does my jaw ache when I chew, and is that relevant?
- Will starting steroids stop the biopsy being useful?
- How will we know whether the treatment is working?