Clinical presentation, treatment planning and setup in patient 1. (A) Clinical presentation of patient 1 with cutaneous manifestation of T-cell lymphoma (mycosis fungoides). (B) Pre-treatment transversal CT scan with nodular scalp lesions (treatment planning CT with bolus in place). (C) Immobilization mask with integrated wax bolus. (D) Contured target volume, organs at risk (green/blue: eye bulb; red PTV scalp; yellow: optic nerves; purple: left parotid; orange: brain stem; beige: mandible bone), bolus and tumor lesion. (E) transversal cranial treatment planning CT with dose distribution over PTV from 12% isodose (red line) to 52% isodose (dark blue line). (1) tumor lesions, (2) bolus, (3) immobilization mask. (F) Complete treatment setup with correct patient positioning, wax bolus and opened immobilization mask.