Tree-in-Bud Pattern in Neoplastic Pulmonary Emboli
Denis Tack1,
Marie-Cécile Nollevaux2 and
Pierre Alain Gevenois3
1
Department of Radiology, Centre Hospitalier Universitaire de Charleroi, 92
Blvd. Janson, B-6000 Charleroi, Belgium.
2
Department of Pathology, Cliniques Universitaires de Bruxelles,
Hôpital Saint-Luc, 10 Ave. Hyppocrate, B-1200
Bruxelles, Belgium.
3
Department of Radiology, Hôpital Erasme, 808
Rte. de Lennik, B-1070 Brussels, Belgium.

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Fig. 1A. 31-year-old man with neoplastic pulmonary emboli from
abdominal desmoplastic small round-cell tumor. CT scan obtained with
5-mm-thick collimation and photographed with lung window. Enlarged and beaded
segmental and subsegmental pulmonary arteries (A) are seen in right middle and
lower lobes. Tree-in-bud pattern is visible in peripheral zone of right middle
lobe (arrow).
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Fig. 1B. 31-year-old man with neoplastic pulmonary emboli from
abdominal desmoplastic small round-cell tumor. Photomicrograph of peripheral
pulmonary arteries near pleural surface (arrowheads). Centrilobular
arteries are filled with tumor cells (arrows).
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