Epiglottis reshaping using CO2 laser: A minimally invasive technique and its potent applications

Laryngomalacia (LRM), is the most common laryngeal abnormality of the newborn, caused by a long curled epiglottis, which prolapses posteriorly. Epiglottis prolapse during inspiration (acquired laryngomalacia) is an unusual cause of airway obstruction and a rare cause of obstructive sleep apnea syndrome (OSAS)

Langerhans cell histiocytosis presented as bilateral otitis media and mastoiditis

Langerhans cell histiocytosis (LCH) is a rare disease that may affect multiple organs. The etiology of LCH remains unclear to date. It is currently believed that clonal accumulation and proliferation of CD1a-positive Langerhans cells are causative. The term LCH or histiocytosis X refers to three separate illnesses (listed in order of increasing severity): eosinophilic granuloma, Hand-Schüller-Christian disease and Letterer-Siwe disease. A seven-month-old boy presented with history of recurrent bilateral otitis media and rash and seborrheic areas on his scalp. Two days prior, his mother noticed a small lump over the right mastoid. Lateral skull X-ray (Schüller) was evidence for lytic lesion on right temporal bone. The computerized tomography scan showed inflammatory changes with bone erosion. During surgical exploration, fragile slightly yellowish tissue with necrotic areas was found that was determined as LCH on histology. Chemotherapy was subsequently initiated. The initial presentation of LCH with bilateral ear and skull involvement is a very rare condition. The signs and symptoms of otologic histiocytosis can mimic those of acute and chronic infectious ear disease. Only a surgically obtained biopsy leads to definitive diagnosis and appropriate therapy

Evidence of volume bubble creation during laser ablation of PMMA organic polymer

We present results related to the PMMA organic polymer laser ablation for several values of the energy flux of the XeCl laser. These results seem to support the model of volume superheating, which is associated with bubble creation, bubble association, and subsequent burst. It is shown that the laser ablation mode correlates well with the generated acoustic wave and the noise imposed on it that is detected by a sensitive pressure transducer located in the back of the sample.PACS Nos.: 72.20; 72.60; 42.62 cf; 81:05 </jats:p