Global Photodynamic Therapy Market Size, Share & Growth Analysis By Product Type (Photosensitizer Drugs – ALA, Porphyrins, Chlorins; PDT Devices – Diode Lasers, LED Systems; Light Delivery Accessories – Fiber Optics), By Application (Oncology – Skin, Lung, Esophageal Cancer; Dermatology – Actinic Keratosis, Acne, Psoriasis; Ophthalmology – AMD), By End-User (Hospitals, Dermatology Clinics, Cancer Centers, Research Institutes) Industry Trends, Competitive Landscape & Forecast 2025–2034