[Rupture of an internal carotid artery pseudoaneurysm after irradiation for a nasopharyngeal carcinoma--case report].

The primary treatment of nasopharyngeal carcinoma (NPC) has been external radiotherapy. Rupture of an internal carotid artery (ICA) pseudoaneurysm is a rare complication of irradiation therapy for a nasopharyngeal carcinoma. A 78 years old man had a history of NPC treated with radiotherapy in 1993.

Distribution of thermal neutron flux around a PET cyclotron.

The number of positron emission tomography (PET) examinations has greatly increased world-wide. Since positron emission nuclides for the PET examinations have short half-lives, they are mainly produced using on-site cyclotrons. During the production of the nuclides, significant quantities of neutrons are generated from the cyclotrons.

[Long-term histological outcome for the larynx after Gore-Tex medialization thyroplasty].

Objectives: We studied the long-term histological response of the human larynx to Gore-Tex implant and evaluated whether its biocompatibility.

Study Design: Retrospective histological study.

Methods: We conducted medialization laryngoplasty with expanded polytetrafluoroethylene (ePTEE or Gore-Tex) in a patient with vocal-fold paralysis.

[Effects and use of the suture direction mimicking only the force action of the lateral cricoarytenoid muscle in arytenoid adduction combined with thyroplasty type I].

Isshiki's arytenoid adduction combined with thyroplasty type I is a useful procedure for correcting the membranous vocal fold atrophy and the height difference between the two vocal folds, particularly in patients with a large posterior glottal chink and atrophy. Conventional arytenoid adduction (Isshiki's arytenoid adduction) is designed to place a suture through the muscular process of the arytenoid attached anteriorly to the thyroid ala, stimulating the function of the thyroarytenoid muscle and lateral cricoarytenoid muscle. Combining with thyroplasty type I, the suture direction of conventional arytenoid adduction prevented inserting implant material into the pocket of the thyroid cartilage window.

[Delayed facial nerve palsy after otologic surgery].

Delayed facial nerve palsy (DFP) is rarely experienced after otologic surgeries that do not directly touch the facial nerves, such as tympano-mastoidectomy, cochlear implants, and stapes surgery, and is troublesome to both surgeons and patients if it happens. Here, we report 7 cases of DFP, including one case that developed DFP after endolymphatic sac surgery. The ratios of occurrence were as follows: 0.

[Four cases of hypopharyngeal cancer treated with docetaxel, cisplatin, and 5-FU followed by radiotherapy and/or neck dissection].

We treated 4 patients with hypopharyngeal cancer, each of whom had a complete response after 2 cycles of chemotherapy with docetaxel, cisplatin, and 5-FU followed by radiation and/or neck dissection. Twenty-one months to 2 years after this therapy, 3 patients had no recurrence and no metastasis with their laryngeal framework and function preserved. Chemotherapy including docetaxel, cisplatin, and 5-FU is a useful treatment for early head and neck cancer.

Spindle cell carcinoma of the larynx.

Four rare cases of spindle cell carcinoma of the larynx are reported and the histo-pathological and immuno-histochemical findings are described. The spindle cell carcinoma involved the right vocal cord of an 88-year-old and an 86-year-old male patients and the anterior commissure of a 76-year-old and a 68-year-old male patients. Two patients underwent total laryngectomy, one patient extirpation under laryngomicrosurgery and one radiation therapy.

[A case of neck metastasis from hypopharyngeal carcinoma successfully treated with TS-1].

We report a case of hypopharyngeal carcinoma with recurrent neck metastasis. Preoperative chemoradiation and pharyngo-laryngo-esophagectomy with bilateral neck dissection was done as first-line therapy. Six months later, the carcinoma metastasized to the right paratracheal lymph node.

Highly precise measurements of the relative gamma-ray intensities for 56Mn and 72Ga.

Precise relative gamma-ray intensities of 56Mn and 72Ga produced by neutron irradiation of natural Mn3O4 and enriched 71Ga2O3 (99.8%) were measured by an HPGe detector with highly-precisely calibrated detection efficiencies. As both nuclides exhibit no beta branch to the ground state, the absolute emission probabilities of the 846.

Precise measurement of the emission probability of the 543 keV gamma ray of 199Pt.

199Pt has been produced by neutron irradiation of enriched 198Pt (95.71%) metal powder, and precise measurements have been made of the gamma-ray emission probabilities by means of 4pibeta-gamma coincidence apparatus and a live-timed two-dimensional data-acquisition system. Daughter 199Au decays with a half-life of 3.

[A case of posterior wall cancer of the hypopharynx treated with docetaxel followed by radiation].

We treated a 67-year-old female with hypopharyngeal cancer (T2N0) in the posterior wall, who had a complete response after two cycles of chemotherapy with docetaxel followed by radiation. Five years after this therapy she has had no recurrence and no metastasis, with preserved laryngeal framework and function. Docetaxel is useful for treating early head and neck cancer.

[A clinical study of 213 patients with laryngeal cancer].

We retrospectively analyzed 213 patients--197 men and 14 women aged 40 to 87 years--with laryngeal cancer treated at our department from September 1986 to December 1997. The male to female ratio was about 12:1. Cases included 120 glottic (56.

Determination of the emission probabilities of the principal gamma-rays for 134Cs to a high precision.

While multi-gamma-ray emitting nuclides such as 75Se, 134Cs and 152Eu have reasonably well-defined decay scheme, some inconsistencies still remain. Detailed evaluations and weighted-mean analyses result in the recommendation of gamma-ray emission probabilities with small uncertainties, although significant deviations exist in the measured values. Therefore, the gamma-ray emission probabilities of 134Cs have been measured to a high precision after an extremely accurate calibration of detection efficiency.