. 2019 Dec 12;8:F1000 Faculty Rev-2092. [Version 1] doi: 10.12688/f1000research.19909.1

Table 2. Different clinical presentations of pyoderma gangrenosum and their associated systemic diseases ^3,
4,
22,
23.

Variant of pyoderma gangrenosum	Common location	Presentation	Associated disease
Ulcerative (classic)	Lower extremities	Rapid progression Violaceous undermined border Very painful	Inflammatory bowel disease (IBD) Arthritis Myeloproliferative disease
Bullous	Face	Superficial bulla Blue-gray border	Myeloproliferative disease (that is, acute myeloid leukemia)
Pustular	Legs Upper trunk	Painful pustules Red halo	IBD
Vegetative	Trunk	Superficial ulcer No violaceous border	None
Peristomal	Near stoma site	Painful ulcer Violaceous undermined border	IBD Enteric malignancies
Post-surgical (procedural) (after nipple piercing)	Surgery site (breast, abdomen most common)	Rapid progression Active and undermined border Pain out of proportion to lesion	Fewer cases of underlying systemic disease (compared with classic form) ²³
Pyostomatitis vegetans	Buccal gingiva, labial and buccal mucosa	Multiple small white or yellow pustules Erythema Edema	IBD

Table 2. Different clinical presentations of pyoderma gangrenosum and their associated systemic diseases 3, 4, 22, 23.