eISSN: 1897-4252
ISSN: 1731-5530
Kardiochirurgia i Torakochirurgia Polska/Polish Journal of Thoracic and Cardiovascular Surgery
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2/2018
vol. 15
 
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Letter to the Editor

Adenocarcinoma adjacent to a rare anatomical variant of right upper lobe

Cheng Shen
,
Guowei Che

Kardiochirurgia i Torakochirurgia Polska 2018; 15 (2): 141-142
Online publish date: 2018/06/22
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We read with great interest the paper by Samancilar et al. [1], accepted for publication in “Kardiochirurgia i Torakochirurgia Polska/Polish Journal of Thoracic and Cardiovascular Surgery”. The authors report the case of a patient with an azygos lobe who underwent videothoracoscopic lung resection due to the presence of non-small-cell lung carcinoma in the upper lobe of the right lung. We present a new case with typical figures in surgery to facilitate the preoperative diagnosis and avoid the misdiagnosis of such a rare disease.
A 51-year-old woman was referred to our hospital for assessment of ground-glass opacity (GGO) that was detected on chest radiography during a routine health check. Physical examination revealed normal breathing sounds in both lung fields. Laboratory findings were within normal limits. Her pulmonary function tests and cardiovascular examination revealed normal performance. High-resolution chest computed tomography (HRCT) scans confirmed presence of an azygos lobe and a GGO measuring 1.2 × 1.0 cm in the anterior segment of the right upper lobe adjacent to the arch of the azygos vein (Figs. 1 A, B). Bronchoscopy was normal and bronchoalveolar lavage from the right upper lobe was negative for malignancy. As diagnosis of the nodule was not established through imaging and bronchoscopic examination, surgery was scheduled. We approached the GGO with mediastinal lymph node dissection; it was removed via video-assisted thoracic surgery (VATS). The azygos lobe was exposed during the operation. The upper part of the pleural cavity was seen to be divided into two compartments by a dome-like fold and occupied the fissure. The fold is a reduplication of the parietal pleura. Its convex margin is attached along a line on the thoracic wall; the attachment commences posteriorly at the right side of the fifth thoracic vertebra, passes obliquely upwards across the posterior parts of the intercostal spaces to the middle of the second rib, and then downwards and forwards to the first costal cartilage, where it disappears in the parietal pleura of the front of the thorax. The free margin of the fold is concave and contains between its two layers the azygos vein (Fig. 2 A). Frozen section of the specimen revealed a well-differentiated adenocarcinoma with negative tumor margins (Fig. 2 B). The patient was discharged 3 days after surgery without major complications. Furthermore, recurrence was not observed during the 1-year follow-up period.
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