Widespread cutaneous bacillary angiomatosis and a large fungating mass in an HIV-positive man.

Bacillary angiomatosis (BA), an infection caused by a gram-negative rod, can be a multiorgan disease. The usual causative organism, Bartonella (formerly Rochalimaea) hensalae, has only recently been identified. Bartonella quintana has also been shown to cause some cases of cutaneous BA. We describe a patient with widespread cutaneous BA with probable bone involvement and a large fungating mass.