Pyostomatitis vegetans is an oral eruption, characterized by small pus
tules, ulcers and erythematous vegetations of the labial and buccal mu
cosae as well as labial-attached gingivae. Its importance lies in its
high correlation with inflammatory bowel disease. It is commonly assoc
iated with skin and inflammatory bowel disease and is rare in children
. We here report a sister and brother with onset of the disease at the
age of 5 and 7 years, respectively. It is the first report of familia
l pyostomatitis vegetans occurring in the youngest patients hitherto r
eported. Conclusion The observation of two sibs with pyostomatitis, ve
getans pyoderma gangrenosum and inflammatory bowel disease suggest a h
ereditary disposition to this rare triad.