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At least 19 recordsLinked to original sources
PubMed1993

[Tomodensitometry and radioisotopic methods in the study of unilateral lung hyperlucencies of vascular origin].

Among the causes of the radiological entity known as unilateral or total hyperlucent lung is the decreased blood flow in the lungs. Unilateral and total hyperlucent lung results, among other factors, from the decreased intrapulmonary blood flow. Classically, the diagnosis and haemodynamic evaluation of these situations were usually made through invasive methods: right heart catheterism to perform angiopneumography and pressure evaluations as well as oximetry at several levels of the vascular network, thoracic aortography eventually associated with selective arteriography to detect the abnormalities of the systemic thoracic circulation. In this context, the authors propose for the diagnosis and study of this pathology, a new non-invasive methodology. In order to achieve this propose, we studied 8 patients, all of them performed clinical and laboratory evaluations, chest chi-ray, electrocardiographic and functional respiratory exams, as well angiopneumography, thoracic aortography tomodensitometry including qualitative (to study the lung arterial vasculature) and quantitative (to evaluate CT density of each lung in Hounsefield unit and two radioisotopic tests, including a ventilation/perfusion study with 133 chi e and HAM-99mTc, through an original software--four parameter histograms allowing simultaneous information of ventilation and perfusion at the pixel level and estimation of the V/Q; the other is the pulmonary gating through which it is possible to identify and quantify the arterio-arterial shunts.(ABSTRACT TRUNCATED AT 250 WORDS)

Female↗
PubMed1988

[The functionally amputated lung. Studies on the unilateral hyperlucent lung syndrome].

On the basis of comprehensive clinicopathological evidence 6 patients presenting with unilateral left-sided hyperlucent lungs are evaluated for pathogenesis, function and postoperative (n = 5) course. The common denominator in all proves to be moderate to severe hypoperfusion and overinflation of the respective lungs. Pulmonary function is characterized by a combined restrictive-obstructive pattern. In 4 patients overinflation is due to a central check-valve mechanism (tumor: n = 3; central airways collapse: n = 1), whereas in 2 increased translucency results from some sort of peripheral obstruction (Swyer-James syndrome: n = 1; congenital cystic bronchiectasis: n = 1). We consider the origin of hypoperfusion to be alveolar distension and hypoxic precapillary vasoconstriction, both participating in diminished blood flow to the check-valve obstructed lung. In Swyer-James syndrome reduced vascularity is an additional feature. Preoperative and long-term postoperative lung function data of 5 pneumonectomized patients are compared. On the whole, FEV1 and IVC remain unchanged, whereas the obstructive profile (RV, RV/TLC, sRAW) improves. From these data it is concluded that the affected hyperlucent lung is 'amputated' even before operation - irrespective of the nature of tissue damage. On the other hand postoperative relief of airways obstruction is supposed to be due to both antiobstructive medication and the removal of a diseased lung.

Adult↗
PubMed1988

Unilateral lung hyperlucency after mediastinal irradiation.

A 39-yr-old woman developed progressive exertional dyspnea 13 yr after receiving mediastinal irradiation for Hodgkin's disease. Chest roentgenogram showed a hyperlucent right lung. Pulmonary blood flow was markedly reduced on the right by ventilation-perfusion scanning. Pulmonary angiography showed attenuation and diffuse atrophy of the right pulmonary artery and its branches. This case represents a late and uncommon complication of mediastinal irradiation manifesting as a unilateral hyperlucent lung.

Adult↗
PubMed1988

Ventilation-perfusion scan in the acutely ill patient with unilateral hyperlucent lung.

A patient with a unilateral hyperlucent lung with acute respiratory complaints is presented. A ventilation-perfusion scan was performed to rule out pulmonary embolism. The perfusion scan ( [99mTC]MAA) showed peripheral perfusion defects in the hyperlucent lung. The ventilation study (133Xe) demonstrated peripheral ventilatory defects on the single breath image in the hyperlucent lung, the filling in of these on the equilibrium view, and diffusely delayed washout in the affected lung. These findings were suggestive of the Swyer-James syndrome and critical in excluding the numerous other causes of unilateral hyperlucent lung, which are discussed. The importance of the ventilation-perfusion study (and particularly the ventilation scan) in the patient with unilateral hyperlucent lung and acute respiratory symptoms is stressed. In addition, a discussion of the Swyer-James syndrome is included.

Aged↗
PubMed1999

[Unilateral hyperlucent lung syndrome--differentiation from lung vasculature pathology].

A cases of unilateral hyperlucent lung syndrome (Swyer-James', MacLeod's syndrome) in a 45-years old male patients is presented. The patient was being treated since 1982 because of recurrent upper and lower respiratory tract's infections. An increasing dyspnea was the main patient's manifestation. In 1997 the patient was admitted to the Department of Phthisiopneumonology Silesian Medical University when diagnosis of unilateral lucent lung syndrome was established. The value of conventional radiological examination of the chest in diagnosis of this syndrome and the meaning of perfusion and ventilatory lung scintigraphy in its differentiation are emphasised.

Diagnosis, Differential↗
PubMed1989

Idiopathic unilateral hyperlucent lung.

The entity of unilateral hyperlucent lung in the adult is presented as a disease which has its origins in childhood and carries the potential for cardiopulmonary morbidity.

Adult↗
PubMed1989

[Idiopathic unilateral hyperlucent lung (analysis of 11 cases)].

11 cases of idiopathic unilateral hyperlucent lung were reported: The clinical pictures and X-ray findings were analysed. The main X-ray changes were abnormal hyperlucency of the affected lung or lobe while the size of the hyperlucent lung was normal or smaller than the contralateral side. The hilar shadow and vascular markings fine and decreased During respiration, the volume of the affected lung remained constant but the mediastinum shifted to the affected side on inspiration and away from it on expiration. The affected lung retained its radiolucency on expiration. The broncho-pulmonary angiogram, lung CT scan and pulmonary vascular tomograph were studied. The clinical pictures, etiology, pathology, X-ray diagnosis and differential diagnosis were discussed.

Adolescent↗
PubMed1990

Ventilation-perfusion scintigraphy in an adult with congenital unilateral hyperlucent lung.

A variety of congenital and acquired etiologies can give rise to the radiographic finding of a unilateral hyperlucent lung. An unusual case of congenital lobar emphysema diagnosed in a young adult following the initial discovery of a hyperexpanded, hyperlucent lung is reported. Although subsequent bronchoscopy and radiologic studies detailed extensive anatomic abnormalities, functional imaging also played an important role in arriving at this rare diagnosis. In particular, ventilation-perfusion scintigraphy identified the small contralateral lung as the functional lung and helped narrow the differential diagnosis to etiologies involving obstructive airway disorders.

Adult↗
PubMed1999

Mediastinal esophageal cyst causing unilateral hyperlucent lung.

Unilateral emphysema secondary to bronchial obstruction by a foregut-derived mediastinal cyst is rare. Here we describe an infant with a unilateral hyperlucent lung due to compression on the left main bronchus by an esophageal cyst, visualized by chest computed tomography and magnetic resonance imaging. A chest roentgenogram and a perfusion scan presented the normalized left lung after resection of the cyst.

Esophageal Cyst↗
PubMed1994

Scintigraphy, angiography and computed tomography in unilateral hyperlucent lung due to obliterative bronchiolitis.

This study examines the value of different imaging methods in assessing the anatomic structures of unilateral hyperlucent lung due to obliterative bronchiolitis. We studied 9 patients, 5 males and 4 females, suffering from UHL (mean age 49 years). Ventilation-perfusion scan (VPS) and computed tomography (CT) of the chest were performed in all, and conventional angiography or digital substraction angiography (DSA) in 7 patients. The VPS showed the characteristic pattern of a matched ventilation-perfusion defect and considerable air trapping during the washout phase. Conventional angiography and DSA displayed a smaller pulmonary artery on the affected side, with a poor peripheral vasculature. CT displayed a loss of lung volume in all cases, with diminished mean attenuation values, a markedly diminished vasculature and integrity of the main airways. In contrast to other imaging modalities, CT imaged bronchiectasis, which was the cause of the patients' clinical symptoms of bronchorrhea and hemoptysis. We conclude that CT of the chest is the most valuable imaging method for evaluating unilateral hyperlucent lung, particularly in symptomatic patients.

Adult↗
PubMed1988

Presentation of Pneumocystis carinii pneumonia as unilateral hyperlucent lung.

Pneumocystis carinii pneumonia (PCP) presented as unilateral hyperlucent lung in a 27-month-old patient with a brain tumor who was receiving chemotherapy. Although unilateral pneumonia is an uncommon presentation of PCP in non-AIDS patients, PCP must be suspected in any pediatric cancer patient not receiving trimethoprim-sulfamethoxazole prophylaxis and receiving intensive chemotherapy.

Antineoplastic Combined Chemotherapy Protocols↗
PubMed1980

Unilateral hyperlucent lung: the case for investigation.

Seventeen children with unilateral hyperlucent lungs were referred for investigation. Of the 11 who had a referring diagnosis of possible Macleod's syndrome only two were shown to have post-viral bronchiolitis. Three of the 11 had conditions that required surgical treatment and a further two with brochiectasis were treated medically. To avoid confusion we suggest that Macleod's syndrome is reserved exclusively for children with post-viral bronchiolitis. Radioisotopic regional lung function studies were useful in the investigation of the subjects from three points of view. Firstly, they distinguished children with primary perfusion abnormalities and normal ventilation, secondly, they defined the extent of altered respiratory function, and thirdly, they were able to distinguish compensatory emphysema from congenital lobar emphysema. As bronchography and bronchoscopy may be hazardous in small children with poor respiratory reserve, such regional studies may be useful in indicating which patients do not require further invasive investigation.

Child↗
PubMed1982

[The differential diagnosis of the unilateral by hyperlucent lung. Two case reports (author's transl)].

The "unilateral hyperlucent lung" is a roentgenologic diagnosis based on an increased radiolucency of one lung. Aetiology and pathogenesis of this clinical syndrome are discussed together with two own case reports about a 9-year-old girl and a 3-month old boy. Anamnesis, bronchography, scintigraphy and angiocardiography in the girl revealed a Swyer-James syndrome, where typically only one lung is damaged by obliterating bronchiolitis. In the patient the pulmonary changes developed subsequently to a measles-pneumonia, possibly enhanced by an additional pollinosis. The 3-month old infant had a left-sided pulmonary artery hypoplasia and obstructive bronchitis in both lungs. Up to its 7th month of life the child developed sufficiently under conservative therapy, but then a life threatening pneumonia with obstructive bronchitis and respiratory failure occurred, 3 weeks of artificial respiration were without success. The subsequent pneumectomy revealed a hypoplasia of the left lung and a big tracheal cyst as cause of the severe obstruction.

Age Factors↗
PubMed1984

Swyer-James syndrome--unilateral hyperlucent lung syndrome. A case report and review.

Swyer-James syndrome is a pulmonary condition acquired following bronchiolitis obliterans early in life. Clinically characterized by repeated bouts of pulmonary infections, Swyer-James syndrome is characterized radiographically by a unilateral small, hyperlucent lung that demonstrates diminished arterial supply to the involved lung, air-trapping, and bronchiectasis. Radioimaging procedures may reveal otherwise unsuspected bilateral involvement. A 14-year-old Caucasian female with classic findings of Swyer-James syndrome is presented. The differential diagnosis of conditions that may present with a unilateral hyperlucent lung is discussed. Therapy is aimed primarily at control of the intercurrent episodes of bacterial pneumonia.

Adolescent↗