Intravascular Talcosis due to Intravenous Drug Use Is an Underrecognized Cause of Pulmonary Hypertension
Figure 1
Low-power magnification of two cases of intravascular talcosis. The degree of fibrosis ranged from focal fibrosis in perivascular areas (a) to diffuse areas of fibrosis (b). Foreign material can be seen within areas of fibrosis associated with a foreign body giant cell reaction. Polarization of the material is evident in (b).
