RAS RELATED DISEASES

Behcet's disease	Reiter's syndrome
multisystem inflammatory disease	a triad of urethritis, arthritis and conjunctivitis
recurrent oral, genital, eye and skin lesions	painless circinate lesions that may ulcerate forming aphthous-like ulcers
major rau is most common in behcet's and usually found on oropharynx and soft palate	geographic tongue and purpuric rash in palate
positive pathergy test
the dentist plays a key role in diagnosis of behcet's disease as it can cause blindness

behcet's disease

reiter's syndrome

Differential diagnosis:

• plaque-like lichen planus (geographic tongue)

• TB ulcer (major rau)

TB ulcer

Oral squamous cell carcinoma

OSCC