Tracheal diverticulum is often diagnosed incidentally and, due to its rarity, there is no standard treatment. It is a benign entity, but has the potential to cause specific symptoms, such as chronic upper respiratory infection and chronic cough. Symptomatic tracheal diverticulum can be medically treated, but likelihood of recurrence is high. We report a case of surgical resection of symptomatic tracheal diverticulum to prevent recurrence.

Gorham-Stout Syndrome (GSS) is a rare disease characterized by localized bone resorption. Any part of the skeleton may be affected; therefore, symptoms can vary depending on the site involved. Pathological analysis reveals lymphovascular proliferation and osteolysis in the affected lesion, but the etiology of the disease is poorly understood. When GSS occurs in the chest, chylothorax or respiratory failure may occur. Thus far, a standard treatment for GSS has not been established, and the prognosis remains unknown. The following case report describes a successfully treated case of GSS in a 16-year-old boy with an affected sternum and ribs.

Peripheral T-cell lymphoma (PTCL) is a subtype of non-Hodgkin's lymphoma (NHL) and PTCL is quite rare in western countries: this accounting for 10 to 15% of all the case of NHL in Europe (1). Although PTCL may involve many organs, including the sino-nasal cavity and airway, intestinal tract, skin, lymph nodes and liver, it rarely involves the lung, and there are few radiological descriptions to guide making the proper diagnosis (2). We report here on a case of PTCL, unspecified (PTCL-U) that which did involve the lung parenchyma and mediastinal lymph nodes, and we present the clinical manifestations and pathological findings. Case ReportA 39-year-old man was admitted with a mild fever and cough of 3 days duration. The laboratory findings were an erythrocyte sedimentation rate (ESR) of 24 mm/hr, a C-reactive protein (CRP) level of 77 mg/L, the cytoplasmic antineutrophil cytoplasmic antibody (cANCA) was negative and the perinuclear anti-neutrophilic cytoplasmic antibody (pANCA) was negative. The chest radiography on admission revealed a cavitary lesion in the left middle lung zone (Fig. 1A). The chest CT image showed a thin-walled cavitary lesion in the superior segment of the left lower lobe (Fig. 1B). The upper level of the chest CT image, through the carina, revealed multiple lymphadenopathies in the mediastinum. The patient was treated with antibiotics and then he was discharged after the fever and cough had subsided.About 2 months later, the patient was readmitted to our hospital after 2 days of high fever. The laboratory findings were a white blood cell count of 14, 500/uL, a CRP level of 103 mg/L, the C-ANCA and P-ANCA were negative and the sputum acid-fast bacilli was negative. The antibody titer for Epstein-Barr virus was not elevated. Chest radiography showed an ill-defined consolidation in the left middle lung field and a prominent left hilum (Fig. 1C). The follow-up chest CT images showed a thick-walled cavity in the left lower lobe that was Peripheral T-cell lymphoma is a rare type of lymphoma that's derived from postthymic lymphoid T cells. Pulmonary involvement of peripheral T-cell lymphoma of the unspecified type is very rare and the imaging findings of this illness have rarely been reported. We present here a case of peripheral T-cell lymphoma of the unspecified type with a cavitary lesion in the lung parenchyma, and we pathologically confirmed this illness by performing video-assisted thoracoscopic surgery.