Atypical dilation or formation of capillaries as a mid- or long-term response to radiation. These are a benign but sometimes impressive-looking tissue change. Often, post-radiation telangiectasias do not appear until a year or more following the end of the course of radiation.
Soon after end of radiotherapy (1 of 4)
Early after conclusion of radiotherapy for a left anterior vocal cord cancer. There is a small amount of resolving radiation mucositis (white patches) in the interarytenoid area.
1 year later: slight post-radiation telangiectasia (2 of 4)
Nearly a year later, with mild vascular prominence, especially left vocal cord (right of image).
2 years later: post-radiation telangiectasia (3 of 4)
Now nearly two years after end of radiotherapy, much more prominent vascularity, called post-radiation telangiectasia. This side effect of radiation often begins to happen between one and two years after the end of radiotherapy. Notice that the post-radiation telangiectasias involve all areas that received radiation (including false vocal cords, etc.), and not just the area of original tumor. Voice remains very good.
Inflammation with moderate dysplasia (1 of 8)
Hoarseness began 2 years prior to this initial examination photo. This middle aged man has never smoked; has no reflux symptoms, nor has he had any response to empiric reflux therapy. Biopsy shows inflammation with moderate dysplasia. HPV testing was negative. No explanation for this chronic inflammation is ever found. A series of KTP laser treatments of stippled vascular areas and leukoplakia ensues.
Squamous cell carcinoma-in situ (2 of 8)
A year later, similar findings except appearance of a slight anterior commissure inflammatory web. Eventually, after an additional 2 years (5 years after onset of hoarseness) a second biopsy is triggered by aberrant, “corkscrew” capillaries. The diagnosis: squamous cell carcinoma-in situ. Laser excision is typically preferred for well-demarcated early vocal cord cancer, but the diffuse, superficial and bilateral abnormalities suggested radiotherapy instead.
Post radiation (3 of 8)
Six weeks after the end of his 30 radiation treatments, healing of the superficial ulceration (within dotted lines) is underway.
Narrow band light (4 of 8)
Closer view, now under narrow band light: A fine vascular pattern has returned except in the areas bounded by dotted lines.
Regenerated vascular pattern (5 of 8)
Six weeks later (3 months after end of radiotherapy), the superficial ulceration has healed, and voice is very functional. Note the regenerated vascular pattern, and compare with photo 4.
Post-radiation telangiectasias (6 of 8)
“On schedule” a year after the end of successful radiation therapy, post-radiation telangiectasias are becoming evident. Compare progression of these telangiectasias in photos 4, 5, 6, 7, and 8.
Standard light (7 of 8)
Now 3 years from the end of radiotherapy, radiation telangiectasia are “maximal” and stable. Voice remains very good.
Post-radiation telangiectasias (1 of 4)
Years after radiotherapy for vocal cord cancer, the exaggerated capillaries are not typical capillary ectasia, but instead post-radiation telangiectasias. The "polyp" may be also radiation-related because there is no history of voice over-use.
Post radiotherapy (1 of 2)
More than five years after radiotherapy for early vocal cord cancer, the post-radiation telangiectasias seen here are maximal and not expected to increase further. What can occasionally increase, are small polyp-like elevations (arrow to the left).