Label Propagation Algorithm for the Slices Detection of a Ground-Glass Opacity Nodule

A radiologist must read hundreds of slices to recognize a malignant or benign lung tumor in computed tomography (CT) volume data. To reduce the burden of the radiologist, some proposals have been applied with the ground-glass opacity (GGO) nodules. However, the GGO nodules need be detected and labeled by a radiologist manually. Some slices with the GGO nodule can be missed because there are many slices in several volume data. Although some papers have proposed a semi-supervised learning method to find the slices with GGO nodules, the was no discussion on the impact of parameters in the proposed semi-supervised learning. This article also explains and analyzes the label propagation algorithm which is one of the semi-supervised learning methods to detect the slices including the GGO nodules based on the parameters. Experimental results show that the proposal can detect the slices including the GGO nodules effectively.

Endobronchial Lipomatous Polyp: A Rare Benign Tumor of the Lung

Endobronchial lipomatous polyp is a rare nonmalignant tumor of the lung. It comprises 5% of the benign lung tumor, with the majority of benign tumors being hamartoma. Lipomatous polyp often leads to endobronchial lesion, associated with postobstructive pneumonia, hemoptysis, and atelectasis. We hereby present a case and discussion of an elderly man with endobronchial lipomatous polyp, presenting as recurrent pneumonia.

Pulmonary Mucus Gland Adenomas: Are They Always of Endobronchial Localization?

Mucus gland adenoma is an extremely rare benign lung tumor, presumed to arise from the bronchial mucus glands; it is a TTF-1 negative tumor, centrally located, causing the clinical manifestations of obstruction. We report a TTF-1 negative mucus gland adenoma, arising into the medial bronchopulmonary segment, lacking any relation to a bronchus.

Alveolar adenoma: A rare lung tumor

Introduction Alveolar adenoma belongs to the group of benign epithelial tumors. Histogenesis of alveolar adenoma is a combination of proliferation of alveolar pneumocytes and fibrous tissue originating from septal mesenchyma. Case outline A sixty-nine-year old female patient was hospitalized for clinical examination and surgery of well defined and homogenous timorous lesion in the right middle lobe causing pleural pain. Bronchoscopic examination with biopsy did not resolve etiology of the disease. Tumorectomy was performed. Timorous nodule had a multicystic appearance and histologically, histochemically and immunohistochemically, an alveolar adenoma was estimated. Five years after surgery, the patient feels well, without respiratory symptoms and signs of recurrence or malignant alteration, respectively. Conclusion Alveolar adenoma is a rare benign lung tumor, most frequently presented as a solitary pulmonary nodule. After complete surgery, the tumor neither relapses nor malignantly alters. Surgical excision is curative. It is necessary to take into consideration alveolar adenoma, too, when a solitary pulmonary nodule is diagnosed.

A Fifteen Years’ Experience in the Diagnosis and Treatment of Benign Lung Tumors

Even the most sophisticated examinations, such as computerized tomography and percutaneous fine needle biopsy, often do not allow a certain preoperative diagnosis of benign lung cancer. The clinical history may also be deceiving: a smoker over 35 years of age need not necessarily have a primary lung cancer, but this event is frequent enough to justify a diagnostic thoracotomy. In our series, chest tomography proved to be useful and sometimes revealed unsuspected lesions. In contrast, bronchoscopy is useful only for centrally located lesions, and the same is true for bronchial washing and brushing. Finally, thoracotomy, possibly an axillary one with enucleation or possibly transegmentary resection, is the most frequent operation in benign lung tumors, because of the unfailing diagnosis and for the minimal functional damage to the patient. A diagnostic thoracotomy may also avoid the psychologic stress suffered by a patient with a simple but undiagnosed benign lung tumor.