Table 1.

Diagnostic indicators of traps (modified from Hull KM et al.) [25].

1. Recurrent episodes of inflammatory symptoms spanning a period longer than 6 months (several symptoms will generally occur simultaneously)

1.1 Fever

1.2 Gastrointestinal involvement (diarrhoea, abdominal pain, etc.)

1.3 Myalgia (migratory)

1.4 Rash (erythematous macular rash occurs with myalgia)

1.5 Conjunctivitis/periorbital oedema

1.6 Chest pain

1.7 Arthralgia or monoarticular synovitis

1.8 Lymphadenopathy

2. Episodes last more than 5 days on average (variable)

3. Responsive to glucocorticosteroids but not colchicine

4. Affected family members (may not always be present)

5. Any ethnicity may be affected