50.1 MB (50.0 MB compressed)
5120 x 3417 pixels
43.4 x 29.0 cm ⏐ 17.1 x 11.4 in (300dpi)
DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
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Major aphthous ulcer (whitish area) inside the lip of a 37 year old male patient. Aphthous ulcers are painful sores in the mouth which may be caused by hypersensitive reactions to bacteria, minor injuries, acute stress and allergies. They are referred to as 'major' if they are more than 10mm across, and heal leaving a scar. Ulcers tend to heal by themselves but corticosteroid or tetracycline drugs may be prescribed to speed up the process.
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