血卟啉是由正铁血红素除去中间铁原子的四个吡咯环结构成,因此,血卟啉可以认为是血红蛋白助成分之一,血卟啉是从新鲜血液中提取分离出来的光敏物质,在临床恶性肿瘤的治疗和诊断中即利用光敏剂血卟啉(HP)和血卟啉衍生物(HPD)能选择性地被恶性肿瘤所摄取,潴留于肿瘤组织内,排泄迟缓,而正常胚胎、淋巴或炎症等组织则吸收少,排泄快这一特性。 Hematoporphyrins are formed from four pyrrole ring structures that remove intermediate iron atoms from hemin, and therefore, hematoporphyrin can be considered as one of the hemoglobin-assisted components. Hematoporphyrins are photosensitive substances that are extracted and separated from fresh blood. In the treatment and diagnosis of clinical malignancies, the photosensitizers hematoporphyrin (HP) and hematoporphyrin derivative (HPD) can be selectively taken up by malignant tumors, retained in the tumor tissues, and excreted slowly, while the normal embryos Tissues such as lymphatic or inflammatory tissues absorb less and excrete faster.