aphthous

 got this mnemonic online and found it very helpful.

I added some more information to it, my theory being, if I forget one manifestation; I have another one for backup.

A PIE SAC

Arthritis, Ankylosing spondylitis

Pyoderma gangrenosum, Pyoderma vegetans, Perianal skin tags, Psoriasis, Pleuritis, Pericarditis, Pancreatitis

I for eye signs: Iritis, uveitis, episcleritis, conjunctivitis

Erythema nodosum

Sclerosing cholangitis, Sacroilitis

Aphthous ulcers

Clubbing of fingers, Cholelithiasis, renal Calculi

Other manifestations include thromboembolism, vitamin and calcium deficiency due to involvement of the ileum and myocarditis. 

How I remember pANCA is associated with ulcerative colitis: nUCLEAR is an anagram for ULCER so ulcerative colitis is associated with pANCA. 

Is it too much? xD

-IkaN