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Figure 22.1
‘Porphyrin’ photodynamic therapy uses the haem cycle. ALA, 5‐aminolaevulinic acid; CoA, co‐enzyme A; MAL, methyl aminolevulinate.
Figure 22.5
Bowen disease on the lower leg (a) before and (b) 1 year after photodynamic therapy (PDT). Stasis change, oedema and xerosis were prominent and althou...
Figure 22.9
Lesion preparation using a disposable ring curette.
Figure 22.13
Photodynamic therapy to the lower leg using a red LED source.
Figure 22.17
Expected residual erythema and crusting 1 week after photodynamic therapy.
Figure 22.21
Positive patch tests confirming contact allergy to a proprietary preparation of 5‐aminolaevulinic acid (ALA). Contact allergy to both ALA and methyl a...
Figure 22.2
Crimson red protoporphyrin IX fluorescence in a superficial basal cell carcinoma 3 h after methyl aminolevulinate application, showing the tumour spec...
Figure 22.6
Superficial basal cell carcinoma on the back (a) before and (b) 1 year after photodynamic therapy. Note the excellent cosmetic outcome, with only the ...
Figure 22.10
Pro‐drug application.
Figure 22.14
Ambulatory photodynamic therapy. Irradiation is underway, as indicated by the red light emission from the portable inorganic LED source (Ambulight).
Figure 22.18
Severe phototoxic reaction persisting 1 week after photodynamic therapy in a fair‐skinned subject with marked field change photodamage.
Figure 22.3
Absorption spectrum of protoporphyrin IX.
Figure 22.7
Photodynamic therapy (PDT) is ideal for multiple and/or large lesions and field change. This patient had extensive actinic keratosis, Bowen disease an...
Figure 22.11
Pro‐drug occlusion under Tegaderm. An additional UV/visible light opaque dressing would also be applied if the lesion is on an exposed site.
Figure 22.15
Daylight photodynamic therapy (PDT) allows field areas of superficial actinic keratosis on exposed sites to be treated in one session. This man had da...
Figure 22.19
Urticaria at the treatment site immediately after photodynamic therapy.
Figure 22.4
Field treatment of actinic keratoses on the forehead and temple (a) before and (b) 3 months after a single treatment of topical photodynamic therapy.
Figure 22.8
Photodynamic therapy (PDT) is ideal for lower leg sites as the risk of poor healing and ulceration is reduced. This patient has lower leg oedema, stas...
Figure 22.12
Mapping out the irradiation field to include a 5 mm rim of clinically uninvolved skin.
Figure 22.16
Erythema and oedema immediately after photodynamic therapy.
Figure 22.20
Dermatitis arising at the photodynamic therapy (PDT) treatment site in a patient who had received multiple treatments with topical PDT to field areas....