globular atelectasis is a rare lung pseudotumor that is most numerous commonly associated with asbestos-related pleural disease yet can result from a variety of chronic pleural diseases.

globular atelectasis is a rare lung pseudotumor that is most numerous commonly associated with asbestos-related pleural disease yet can result from a variety of chronic pleural diseases. We describe a patient who perform the operations indicated ined round atelectasis over a period of barely several months following an acute pleuropulmonary illness caused at Legionnella pneumophila.

Although the original description of circular atelectasis in the English literature regarded three patients with subacute pleuritic symptoms that worsened through the whole extent of a few years,[1] the prevalent clinical perception is that orbicular atelectasis presents as an asymptomatic radiographic finding associated with chronic pleural disease, usually related to asbestos exposure[2-8] Herein we describe a patient who perform the operations indicated ined round atelectasis shortly after an episode of Legionnella pneumonia illustrating to what extent this uncommon disorder may disclose following an acute bacterial pleuropulmonary illness without being preced through any significant chronic pleural disease.

CASE REPORT

A 55-year-old man was referr for evaluation of a right middle lobe nodule visualized according to chest computed tomographic (CT) scan. The patient had originally at handed to another medical facility 2 years previously with complaints of dyspnea, agitation severe right-sided chest pain, and hemoptysis that had bring to maturityed over 3 days. His medical history was remarkable for thyroid surgery for a papillary carcinoma, pair episodes of pneumonia, and a history of "asthma" for which he took no medication. He had no history of tobacco use or frontage to asbestos. Findings from his physical exam were remarkable for distress secondary to pain, tachypnea, crackles through the whole extent of the right lung base, and a coarse pleural smooth Chest radiograph revealed small bilateral effusions. Arterial house gases at room air were normal. on the subject of admission to the hospital, he underwent a V/Q scan that was believed to be grave probability for pulmonary embolus. A duplex Doppler research of the lower extremities was normal. A chest ultrasound confirmed the bilateral effusions moreover these were believed to be too small for safe thoracentesis. He was empirically treated with IV erythromycin and his symptoms improved across the next 2 days. line and sputum cultures were negative. However, sputum samples were positive for Legionella pneumophila according to direct fluorescent stain. He was discharged from the hospital forward a regimen of erythromycin, and all symptoms resolved

Five month later, the patient instanted with mild right-sided chest pain. Chest radiograph revealed blunting of the right costophrenic angle. athwart the next 6 months, his chest pain persisted and serial chest radiographs revealed progressive pleuro-parenchymal disease. Decubitus radiographs were obtained and revealed no pleural effusion. A V/Q scan was repeated and interpreted as subdued probability for pulmonary embolus. Eventually, the chest pain resolv still the radiographic abnormalities persisted (Fig 1) A chest CT scan revealed a peripheral right middle lobe nodule. However, thin-section CT scan was performed in consequence of this lesion, and changes consistent with cylindrical atelectasis were noted (Fig 1) Bronchoalveolar lavage and transbronchial biopsy specimens from the affected lobe were unremarkable. A CT-guided needle biopsy specimen revealed single inflammation and acellular collagenous tissue. With the normal comes of cytopathologic studies and the findings in succession CT consistent with round atelectasis, it was believed that thoracotomy was unnecessary. He continues to do well 18 month after the CT-guided biopsy, and the radiographic abnormalities have remained stable.

DISCUSSION

orbed atelectasis is an uncommon lung pseudotumor that was first described through Loeschke[9] in 1928 in the German literature, and as "the flocked lung" by Blesovsky[1] in English in 1966 It is a peripheral lesion consisting of atelectatic lung encircleed by fibrotic pleura with utensils and bronchi extending from it in a curvilinear fashion. Asbestos position accounts for the majority of cases reported. In the case series of Hillerdal[2] of 74 patients with cylindrical atelectasis, 64 patients (86 percent) were raise to have asbestos exposure. Other reported etiologies include congestive heart failure,[3] postthoracotomy,[4] posttraumatic rib fractures with hemorrhagic effusion,[2] and posttherapeutic pneumothorax.[5] circular atelectasis is most often noted as an asymptomatic, incidental finding forward chest radiograph.[3,6-8]

There are pair theories concerning the possible pathophysiology behind the unfolding of round atelectasis. One propos by the agency of Hanke and Kretzschmar[5] theorizes that spherical atelectasis develops as a accrue of a pleural effusion causing a partially aerated portion of the lung to float. A gap subsequently forms in the collapsed section and that portion of the lung is forced to tilt forward itself. As the effusion analyzes fibrinous adhesions bind the tilted portion of the lung in place resulting in an atelectatic parenchymal mass from which the characteristic curvilinear bronchi and tubes extend. A second theory advocated by means of Menzies and Fraser[7] is that the primary insult leads to inflammation and fibrosis of the visceral pleural surface, and as the fibrosis contracts, the parenchyma is forced to fasten with a buckle on itself leading to cylindrical atelectasis. The lack of significant pleural effusion in our patient is more consistent with this secondary theory.

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