Decreased Opacity without Cystic Walls

, Joungho Han², Man Pyo Chung³ and Yeon Joo Jeong⁴

(1)

Department of Radiology Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea, Republic of (South Korea)

(2)

Department of Pathology Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea, Republic of (South Korea)

(3)

Department of Medicine Division of Pulmonary and Critical Care Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea, Republic of (South Korea)

(4)

Department of Radiology, Pusan National University Hospital, Busan, Korea, Republic of (South Korea)

Abstract

Please refer to section “Mosaic Attenuation” Chap. 13.

Vascular causes of mosaic perfusion include chronic pulmonary thromboembolism and pulmonary arterial hypertension.

Mosaic Attenuation, Vascular

Definition

Please refer to section “Mosaic Attenuation” Chap. 13.

Diseases Causing Vascular Causes of Mosaic Perfusion

Vascular causes of mosaic perfusion include chronic pulmonary thromboembolism and pulmonary arterial hypertension.

Distribution

Areas of mosaic perfusion in chronic thromboembolism or pulmonary arterial hypertension are typically segmental or subsegmental in distribution [1].

Clinical Considerations

Pulmonary arterial hypertension may be idiopathic or arise in association with chronic pulmonary thromboembolism; pulmonary embolism caused by tumor cells, parasitic material, or foreign material; parenchymal lung disease; liver disease; vasculitis; human immunodeficiency virus infection; or a left-to-right cardiac shunt [1].

Key Points for Differential Diagnosis

Please refer to section “Mosaic Attenuation” Chap. 13.

Mosaic Attenuation, Obstructive Airway Disease

Definition

Please refer to section “Mosaic Attenuation” Chap. 13.

Airway Diseases Causing Mosaic Attenuation

Mosaic attenuation can be seen in a variety of airway diseases including bronchiectasis, cystic fibrosis, allergic bronchopulmonary aspergillosis (ABPA) (Fig. 24.1), asthma (Fig. 24.2), and constrictive bronchiolitis.