tokens: In 11 patients with Horton ' s headache morphological investigations ( differential white blood cell count ) , cytoenzymatic determinations ( alkaline and acid phosphatase , non - specific esterase ) and cytoimmunological tests ( IgM and IgG binding ) were carried out on capillary blood neutrophils obtained from the area of pain , non - painful area of the skin on the head on the contralateral side , and from the finger .