Consecutive biopsies were studied electron microscopically on three temporal arteritis patients. All biopsies showed a combination of pathological changes of various stages of the disease with confirmation of the smooth muscle cell involvement. Biopsies obtained in the clinically acute periods showed inflammatory elements predominantly. Later biopsies of the same patient showed granulomatous reactions and muscular regeneration.
Kuwabara T, Reinecke RD. Temporal ArteritisII. Electron Microscopic Study on Consecutive Biopsies. Arch Ophthalmol. 1970;83(6):692-697. doi:10.1001/archopht.1970.00990030692003