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Cotton-wool spots in giant cell arteritis

Elisabeth De Smit and Eoin O’Sullivan
CMAJ June 11, 2013 185 (9) 796; DOI: https://doi.org/10.1503/cmaj.120540
Elisabeth De Smit
From the Eye Unit, Croydon University Hospital, Croydon, UK
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Eoin O’Sullivan
From the Eye Unit, Croydon University Hospital, Croydon, UK
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  • For correspondence: eoin.o’sullivan@croydonhealth.nhs.uk
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A 71-year-old woman presented with reduced vision in her right eye. She also reported having a headache, scalp tenderness and pain in her jaw when chewing. On funduscopy, multiple cotton-wool spots were observed in both eyes, more markedly in the right eye (Figure 1A). Her erythrocyte sedimentation rate was markedly elevated at 90 mm/h. Biopsy of the temporal artery confirmed giant cell arteritis. Despite high-dose intravenous treatment with steroids, her vision deteriorated in both eyes. The vision improved subsequently in her left eye but remained poor in the right eye. The systemic symptoms resolved, and her erythrocyte sedimentation rate dropped to 25 mm/h. Over the next 2 months, the cotton-wool spots resolved completely (Figure 1B).

Figure 1:
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Figure 1:

(A) Cotton-wool spots (arrows point to the largest ones) in the fundus of the right eye of a 71-year-old woman with headache and reduced vision in her right eye. (B) The fundus 2 months later, showing complete resolution of the spots.

Cotton-wool spots are found in many conditions. If present, multiple spots are typically seen in patients with hypertension, rheumatologic disease, diabetes or HIV infection. They are associated with retinal ischemia and represent localized accumulation of axoplasmic debris. Their pathogenesis is a topic of debate, and in giant cell arteritis it may be multifactorial.1

Ocular involvement occurs in up to 70% of patients with giant cell arteritis.2 The most common ocular sign is anterior ischemic optic neuropathy, which presents with visual loss. A pale swollen optic disc is highly suggestive of anterior ischemic optic neuropathy from giant cell arteritis (Appendix 1, available at www.cmaj.ca/lookup/suppl/doi:10.1503/cmaj.120540/-/DC1), but absence of pallor does not exclude this diagnosis. Although cotton-wool spots may be seen in giant cell arteritis,2 they are rarely an isolated presenting sign.3 In our patient, the presence of headache, scalp tenderness, jaw claudication and an elevated erythrocyte sedimentation rate were key to making the diagnosis of giant cell arteritis.

Any patient in whom vision is threatened and the diagnosis of giant cell arteritis is suspected should be given high-dose intravenous treatment with steroids and referred for specialist management.4

Footnotes

  • Competing interests: None declared.

  • This article has been peer reviewed.

References

  1. ↵
    1. Schmidt D,
    2. McLeod D
    . Cotton wool spots should not be regarded as retinal nerve fibre layer infarcts. Eur J Med Res 2007; 12:179–80.
    OpenUrlPubMed
  2. ↵
    1. Hayreh SS,
    2. Podhajsky PA,
    3. Zimmerman B
    . Ocular manifestations of giant cell arteritis. Am J Ophthalmol 1998;125:509–20.
    OpenUrlCrossRefPubMed
  3. ↵
    1. Johnson MC,
    2. Lee AG
    . Giant cell arteritis presenting with cotton wool spots. Semin Ophthalmol 2008;23:141–2.
    OpenUrlCrossRefPubMed
  4. ↵
    1. Dasgupta B,
    2. Borg FA,
    3. Hassan N,
    4. et al
    . BSR and BHPR guidelines for the management of giant cell arteritis. Rheumatology 2010;49:1594–7.
    OpenUrlFREE Full Text
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Canadian Medical Association Journal: 185 (9)
CMAJ
Vol. 185, Issue 9
11 Jun 2013
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Cotton-wool spots in giant cell arteritis
Elisabeth De Smit, Eoin O’Sullivan
CMAJ Jun 2013, 185 (9) 796; DOI: 10.1503/cmaj.120540

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Cotton-wool spots in giant cell arteritis
Elisabeth De Smit, Eoin O’Sullivan
CMAJ Jun 2013, 185 (9) 796; DOI: 10.1503/cmaj.120540
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