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# Large-vessel vasculitis: giant cell vs Takayasu

- Lesion

Two granulomatous diseases of the aorta and its branches: one strikes the head arteries of older adults, the other the aortic arch of young women.

Updated Nov 12, 2026

## Key points

- Giant cell arteritis: over 50, headache, tender temporal artery, jaw claudication, visual loss; linked to polymyalgia rheumatica; high ESR and CRP.
- Biopsy of the temporal artery must be long because lesions are patchy (skip lesions); a negative biopsy does not exclude it.
- Takayasu: under 50, often women of Asian descent; weak or absent arm pulses, unequal pressures, renal and pulmonary artery involvement.
- Both: granulomatous inflammation of the media with giant cells and fragmentation of the internal elastic lamina.
- Late Takayasu: fibrotic, thickened aortic wall with narrowed branch ostia; aortic root involvement can cause valve regurgitation.

## What it is

Giant cell arteritis and Takayasu arteritis are T-cell mediated granulomatous inflammations of large arteries with almost the same histology; age and distribution separate them. Giant cell arteritis is the commonest vasculitis of older adults and affects branches of the carotid (temporal, ophthalmic, vertebral) and the aorta; it can cause sudden blindness. Takayasu arteritis affects the aortic arch and its branches in younger people, mainly women, narrowing the arteries of the arms.

## Structure

- Giant cell arteritis: intimal thickening narrowing the lumen; granulomas with multinucleated giant cells at the internal elastic lamina, which is fragmented; sometimes only a non-specific lymphocytic panarteritis.
- Takayasu: early mononuclear inflammation around the vasa vasorum and granulomas in the media; later dense fibrosis of media and adventitia; irregular thickened aortic intima (tree-bark).

## Giant cell arteritis versus Takayasu arteritis

| Disease | Who | Arteries and signs |
| --- | --- | --- |
| [Giant cell arteritis](https://durgical.com/en/conditions/giant-cell-arteritis/) | Over 50; more women | Carotid branches (temporal, ophthalmic, vertebral) and aorta: headache, jaw claudication, sudden blindness; polymyalgia rheumatica |
| [Takayasu arteritis](https://durgical.com/en/conditions/takayasu-arteritis/) | Under 50; mostly young women | Aortic arch and branches, renal and pulmonary arteries: weak arm pulses, unequal pressures, claudication of the arms |

## Clinical notes

- Giant cell arteritis is an emergency because ophthalmic artery involvement can cause permanent blindness; treatment is started before the biopsy result.
- Large-vessel imaging shows that giant cell arteritis often involves the aorta too, with later aneurysm risk.

## Memory aid

Grey hair and a tender temple (giant cell); a young woman with no pulse in her arm (Takayasu): same granuloma, different decade.

## Test yourself

Think of the answer, then tap the question to see it.

## Why can a temporal artery biopsy be falsely negative in giant cell arteritis?

Because the inflammation is segmental (skip lesions), so a short biopsy can miss it.

## Which complication makes giant cell arteritis an emergency?

Sudden, permanent visual loss from ophthalmic or posterior ciliary artery involvement.

## Why is Takayasu arteritis called ‘pulseless disease’?

Narrowing of the subclavian and other arch branches weakens or abolishes the pulses of the arms.

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## Elsewhere in DurgiPedia

- [Granulomatous inflammation](https://durgical.com/en/immunology/granulomatous-inflammation/)

## Connections

## Related 3

- [Vasculitis: classification and mechanisms](https://durgical.com/en/general-pathology/vasculitis-classification-and-mechanisms/)
- [Granulomatous inflammation: caseating vs non-caseating, the causes to know](https://durgical.com/en/general-pathology/granulomatous-inflammation-caseating-vs-non-caseating-the-causes-to-know/)
- [Aneurysms: types and pathogenesis](https://durgical.com/en/general-pathology/aneurysms-types-and-pathogenesis/)

## Related conditions 6

- [Giant cell arteritis](https://durgical.com/en/conditions/giant-cell-arteritis/)
- [Takayasu arteritis](https://durgical.com/en/conditions/takayasu-arteritis/)
- [Polymyalgia rheumatica](https://durgical.com/en/conditions/polymyalgia-rheumatica/)
- [Central retinal artery occlusion](https://durgical.com/en/conditions/central-retinal-artery-occlusion/)
- [Thoracic aortic aneurysm and aortitis](https://durgical.com/en/conditions/thoracic-aortic-aneurysm-and-aortitis/)
- [Aortic regurgitation](https://durgical.com/en/conditions/aortic-regurgitation/)

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Educational content on the mechanisms of disease; not a diagnostic or treatment guide and no substitute for a health professional's advice. No doses are given.

Sources: [Giant Cell Arteritis (Temporal Arteritis)](https://www.ncbi.nlm.nih.gov/books/NBK459376/) (StatPearls (NCBI Bookshelf), 2025); [Takayasu arteritis: MedlinePlus Medical Encyclopedia](https://medlineplus.gov/ency/article/001250.htm) (MedlinePlus, US National Library of Medicine, 2025).

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Representative model, for educational purposes only.

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Source: https://durgical.com/en/general-pathology/large-vessel-vasculitis-giant-cell-vs-takayasu/
License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Cite as: DurgiPedia (durgical.com), https://durgical.com/en/general-pathology/large-vessel-vasculitis-giant-cell-vs-takayasu/