Pneumothorax is an extremely rare complication of non-tuberculous mycobacterial infection. A 52-year-old man presenting with difficulty breathing and chest pain was admitted to our hospital. A right-sided pneumothorax was observed on chest radiography and chest computed tomography showed multiple cavitating and non-cavitating nodules with consolidation in the upper to middle lung zones bilaterally. Serial sputum cultures were positive for Mycobacterium kansasii, and he was diagnosed with pulmonary M. kansasii disease complicated by tension pneumothorax. After initiation of treatment including decortications and pleurodesis, the patient made a full recovery. We herein describe this patient's course in detail and review the current relevant literature.
Chest Pain ; Humans ; Lung ; Middle Aged ; Mycobacterium kansasii* ; Mycobacterium* ; Pleurodesis ; Pneumothorax* ; Radiography ; Respiration ; Sputum ; Thorax

No abstract available.
Fingers*

Clinicians should pay close attention to the potential risk of coronary vasospasm, even cardiac arrest, after sugammadex administration.

Polymorphic ventricular tachycardia (PVT) is a fatal arrhythmia that can occur during the treadmill test. This report documents an instance of PVT by the R-on-T phenomenon during an exercise stress test in a 61-year-old male with stable angina pectoris. The subject performed the treadmill test for 581 seconds, and stopped after reaching 115% of the target heart rate. Ischemic ST changes were observed in leads II, III, aVF, and V3-V6 from stage 3. Premature ventricular complexes were noted during the recovery period, with an occurrence of pulseless PVT, reflective of the R-on-T phenomenon. Spontaneous circulation was resumed after unsynchronized cardioversion at 200 J and 2 minutes of cardiopulmonary resuscitation. Emergency coronary angiography revealed 95% stenosis of the proximal right coronary artery, which was fully dilated after percutaneous coronary intervention with a drug-eluting stent. The patient was discharged without any neurologic sequelae.

Plasmacytomas are extramedullary accumulations of plasma cells originating from soft tissue. Mediastinal plasmacytoma is a rare presentation. A 67-year-old man recovered after antibiotic treatment for community-acquired pneumonia. However, on convalescent chest radiography after 3 months, mass like lesion at the right lower lung field was newly detected. Follow-up chest computed tomography (CT) revealed an increase in the extent of the right posterior mediastinal mass that we had considered to be pneumonic consolidations on previous CT scans. Through percutaneous needle biopsy, we diagnosed IgG kappa type extramedullary plasmacytoma of the posterior mediastinum.
Aged ; Biopsy, Needle ; Diagnosis ; Follow-Up Studies ; Hematopoiesis, Extramedullary ; Humans ; Immunoglobulin G ; Lung ; Mediastinum ; Plasma Cells ; Plasmacytoma* ; Pneumonia* ; Radiography ; Thorax ; Tomography, X-Ray Computed

BACKGROUND AND OBJECTIVES: Tympanic membrane perforation is an important clinical problem found in various populations of the world. In large number of cases, acute traumatic perforations heal spontaneously, and in the healing process, stem cells appear to play an important role. However, no studies have been reported regarding somatic stem cells in the tympanic membrane. Herein, we tried to show that guinea pig's tympanic membrane contains cells that display the characteristic features of stem cells. MATERIALS AND METHOD: The tympanic membrane was obtained from the guinea pig. The cells were cultured in a medium with epidermal growth factor (EGF) and fibroblast growth factor (FGF). Proliferating cells were checked with stem cell markers, bromodeoxyuridine (BrdU) and nestin. Differentiated cells from stem cells are checked with betaIII tubulin and S-100. RESULTS: We observed that some of the cultured cells from the tympanic membrane were stained with both stem cell markers, BrdU and nestin. And we observed that these cells differentiated into neuron and gilal cells, which expressed betaIII tubulin and S-100, respectively. CONCLUSION: These results suggest that the tympanic membrane of guinea pigs may have neural stem cells. Further study is needed for finding the origin of stem cells.
Adult ; Adult Stem Cells ; Animals ; Bromodeoxyuridine ; Cells, Cultured ; Epidermal Growth Factor ; Fibroblast Growth Factors ; Guinea ; Guinea Pigs ; Humans ; Intermediate Filament Proteins ; Nerve Tissue Proteins ; Neural Stem Cells ; Neurons ; Stem Cells ; Tubulin ; Tympanic Membrane ; Tympanic Membrane Perforation