Unencapsulated thymoma: a case report.

Thymomas, the most common mediastinal tumors, form capsules. Only a few reports have presented small thymomas without capsule formation, so-called microthymomas. Here, we report a case of an unencapsulated thymoma measuring 18 mm.

Primary pulmonary epithelioid sarcoma: a case report.

Background: Epithelioid sarcoma most frequently occurs in the dermal or subcutaneous area of the distal extremities. To date, there have been three cases of primary pulmonary epithelioid sarcoma reported. We report a case of epithelioid sarcoma that is considered a primary lung tumor.

[Multiple Minute Pulmonary Meningothelial-like Nodules;Report of a Case].

A 57-year-old woman was referred to our hospital for investigation of multiple tiny nodules in the lung fields bilaterally on computed tomography (CT). Video-assisted thoracoscopic lung biopsy was performed to diagnose the pulmonary lesions. Histological analysis showed nodular lesions with interstitial proliferation of uniform, round to oval cells with variable widening of the alveolar septa.

[Pancreatic Pleural Effusion;Report of a Case].

A 50-year-old man was admitted with respiratory failure. Chest X-ray and computed tomography revealed massive left pleural effusion and mediastinal shift. Pleural effusion showed abnormally high amylase levels of 42,600 IU/l and a high protein level of 3.

Epithelial-myoepithelial carcinoma of the lung: a case report.

Background: Pulmonary epithelial-myoepithelial carcinoma (P-EMC) is a rare subset of salivary gland-type tumors of the lung. Because of its rarity and unproven malignant potential, the optimal therapy for P-EMC has not been defined. Here, we report a typical case of P-EMC and a review of the literature to consider appropriate treatment.

Benign clear cell "sugar" tumor of the lung in a patient with Birt-Hogg-Dubé syndrome: a case report.

Background: Birt-Hogg-Dubé (BHD) syndrome is a rare inherited autosomal genodermatosis and caused by germline mutation of the folliculin (FLCN) gene, a tumor suppressor gene of which protein product is involved in mechanistic target of rapamycin (mTOR) signaling pathway regulating cell growth and metabolism. Clinical manifestations in BHD syndrome is characterized by fibrofolliculomas of the skin, pulmonary cysts with or without spontaneous pneumothorax, and renal neoplasms. There has been no pulmonary neoplasm reported in BHD syndrome, although the condition is due to deleterious sequence variants in a tumor suppressor gene.

[Mediastinal cystic lymphangioma; report of a case].

A cystic lymphangioma is a rare mediastinal benign tumor. A 38-year-old male was referred to our hospital because of an mediastinal mass incidentally detected on chest X-ray. The mass had enlarged rapidly during the course of 1 year.

Arteriovenous hemangioma in the middle mediastinum: report of a case.

Hemangiomas in the mediastinum are uncommon, and the majority of these tumors are located in the anterior mediastinum. The present report describes an extremely rare case of a hemangioma in the middle mediastinum. A 40-year-old male patient presented with a mass in the left lower lung field on radiographic screening.

Pleuropulmonary paragonimiasis with intrathoracic mass.

Pleuropulmonary paragonimiasis is a food-borne parasitic disease caused by the lung fluke Paragonimus westermani or other species of Paragonimus, which is endemic in Southeast Asia. It presents mainly pleural effusion or intrapulmonary nodules with respiratory symptoms. However, here we describe an exceedingly rare case of Paragonimus westermani with a mass in the pleural cavity.

[Impact of cimetidine on growth and metastasis of surgically transplanted Lewis lung cancer].

Purpose: Histamine has multiple biological functions and its immunomodulatory actions are not fully understood. In the current study, we investigated the effect of cimetidine, which is a histamine-2 receptor antagonist, on the progress of transplanted Lewis lung cancers using a mouse model.

Methods: A piece of Lewis lung cancer weighing 15 mg was transplanted into the subcutaneous space on the back of each C 57 BL/6 mouse.

[Minute pulmonary meningothelial-like nodules: a case report].

The presence of multiple small nodular shadows on a routine chest radiograph was noticed in a 56-year-old woman who had undergone a left mastectomy on the diagnosis of breast cancer 8 years before. Chest CT films revealed small nodules scattered beneath the pleura mainly in both lower lobes. A biopsy was performed during video-assisted thoracoscopy to rule out metastasis from breast cancer.