Lung - nontumor
Other nonneoplastic disease
Veno-occlusive disease

Author: Elliot Weisenberg, M.D. (see Authors page)

Revised: 23 March 2017, last major update December 2011

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PubMed search: veno-occlusive disease [title] pulmonary

Cite this page: Veno-occlusive disease. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/lungnontumorvenooccl.html. Accessed July 25th, 2017.
Clinical features
  • Rare, usually children and adolescents, especially females
  • Also after cancer chemotherapy
  • Causes pulmonary hypertension secondary to widespread thromboemboli of large and medium size branches of pulmonary vein; also diffuse occlusion of postcapillary venous beds by fibrous tissue
  • Usually recanalization and pseudoangiomatous changes, arterial thickening and hemosiderosis
  • Immune complexes may be involved in pathogenesis
  • Most patients die within 2 years of diagnosis; lung transplant may prolong lives
Case reports
Microscopic (histologic) description
  • Eccentric intimal thickening of venules in lobular septa with some septal veins completely occluded, increased elastic fibers in venous media (highlighted with elastin stain)
  • Medial hypertrophy of arterioles, but no plexiform lesions
  • Intraalveolar hemorrhage and hemosiderosis
  • Prominent alveolar septa due to congestion
Microscopic (histologic) images

Images hosted on other servers:

Fig 3: septal veins; Fig 4: elastin stain

Various images

Differential diagnosis
  • UIP: no increased elastic fibers