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Pulmonary Capillary Hemangiomatosis (PCH)
Pulmonary Capillary Hemangiomatosis (PCH) is a rare pulmonary vascular disorder characterized by the proliferation of capillaries within the alveolar septa, leading to pulmonary hypertension. It often presents with nonspecific respiratory symptoms, making diagnosis challenging
Prevalence
N/A
US Estimated
N/A
Europe Estimated
Age of Onset
All ages
ICD-10
D18.0
Inheritance
This condition does not appear to have a clear pattern of inheritance.
5 Facts you should know
FACT
PCH is a rare form of pulmonary arterial hypertension (PAH Group 1'), characterized by abnormal proliferation of pulmonary capillaries within alveolar septa, leading to progressive pulmonary vascular resistance and right heart failure
FACT
Clinical presentation overlaps with PVOD, including exertional dyspnea, fatigue, and signs of right ventricular dysfunction; however, PCH tends to have more prominent hemoptysis due to fragile neovascularization
FACT
High-resolution CT (HRCT) may show diffuse centrilobular ground-glass opacities without interlobular septal thickening, helping differentiate it from PVOD; however, radiographic findings alone are not definitive
FACT
Pulmonary vasodilators can precipitate fatal pulmonary edema, similar to PVOD, and must be used cautiously—misdiagnosis as idiopathic PAH can lead to adverse outcomes
FACT
Definitive diagnosis typically requires histopathologic confirmation, although genetic testing for EIF2AK4 mutations (also associated with PVOD) and clinical-radiologic correlation may support diagnosis; lung transplantation remains the only curative therapy
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