[Phenomena of interference between oticokinetic postnystagmus and vestibular nystagmus].
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Biomedical subjects
Publications and source records attributed to I Serafini.
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Fifty-two consecutive patients, affected by large T2 (greater than 3 cm), T3, T4, N0, or N1 previously untreated squamous cell carcinoma of the head and neck, entered this phase I-II study. Treatment consisted of a continuous 8-day infusion on the following daily schedule: cisplatin 25 mg and bleomycin 15 mg administered for 4 and 20 hours, respectively. Technical-related toxicities were 1 case each of coagulation and displacement of the catheter and 1 case of reversible monoparesis of the contralateral arm. Drug-related relevant toxicities accounted for 4 cass of grade 3 or 4 leukopenia and 2 cases of peripheral palsy of the 7th and 12th cranial nerve, respectively. Forty-five of 50 evaluable patients obtained an objective response. In particular, 13 patients obtained a complete response, 22 a partial response greater than or equal to 75%, and 10 a partial response greater than or equal to 50%. Furthermore, 5 of 31 patients showed a complete pathologic disappearance of the tumor, whereas in 12 of 31 only a microscopic residue was found.
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Laryngeal localization (nearly always hypoglottic) of adenoid cystic carcinoma is quite rare (0.6% of all malignant laryngeal tumors). In most cases the local development of the neoplasm is slow, of an infiltrating and highly invasive nature (affecting the cartilage, thyroid gland, esophagus). On the other hand in some cases, particularly in the laryngeal-tracheal localization, the tumors take on an exophytic, sessile, polypoid aspect. Although the evolution is quite slow prognosis is poor due to the latent spreading of distant metastasis (average survival is 8 years). Prognosis is further worsened by delay in diagnosis due to the poor, aspecific initial symptoms. C.A.T. and N.M.R. have made a marked contribution to improved diagnostic definition, especially in terms of tumor extension, which is of great importance in therapeutic staging. Given the poor results obtained with radiotherapy and chemotherapy the only possible treatment is surgery which, in most cases, must be quite radical. Only in those forms which are still localized (with endoluminal exophytic development) is it possible to perform conservative surgery. Two paradigmatic cases are reported here indicating two different tumor extensions: in the first case total laryngectomy was performed and extended to the thyroid gland and the upper portion of the trachea; in the second, a partial glottic-subglottic laryngectomy was performed with functional restoration of laryngeal function. Conservative surgery is only possible if the hypoglottic neoformation is limited to the larynx, if it is mainly exophytic in nature and if histological examination reveals a low degree of malignancy (a high degree of cell differentiation). Since this type of carcinoma tends to give rise to latent distant metastases prognosis is, in all cases, poor no matter what surgical technique is employed for the primary tumor. Therefore it is imperative that a conservative laryngectomy be performed in all cases where it proves oncologically possible and particular attention should be paid to the quality of the patient's post-surgery life.
Three-quarter laryngectomy is regarded as a supraglottic laryngectomy which has been extended on one side to the glottic plane. Indications are those for supraglottic laryngectomy at the vestibular level and of cordectomy extended to the arytenoid at the glottic level (undamaged lower paraglottic space, preserved motility). Surgical technique includes total removal of the laryngeal vestibule together with the hyoid bone, pre-epiglottic space and one supracricoid hemilarynx (vocal cord, arytenoid, medial wall of the entrance of the pyriform fossa) through an internal, subperichondrial approach. Reconstruction of a new cord on the hemilaryngectomy side is through a triangular strip of the exterior thyroid perichondrium. From 1975 to 1989 44 patients underwent a three-quarter laryngectomy in the authors' department. Functional results were positive in all cases. The oncological results were as follows: 6 recurrences (3 local, 2 locoregional lymph node recurrences and 1 distant metastasis) and 4 primary secondary tumors. 9 patients expired (6 of T, 2 of secondary tumor, 1 of other causes). The actuarial 5-year survival rate for the tumor was 79%.
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The modern replacement therapy of inherited bleeding disorders has proved to be a major advance in the management of haemophilic children. However, the haemophiliacs, early treated with commercial clotting factor concentrates obtained from large amounts of plasma, are exposed to blood borne viruses responsible for post-transfusion hepatitis (PTH) and for their possible harmful long-term sequelae. Infact high prevalence of infection with hepatitis B virus, non-A, non-B agents, delta agent has been documented among haemophilic children. In this study we analyze the measures of surveillance at present available in order to reduce the risk of PTH in young haemophilic patients. Among these measures of prevention we point out the magnitude of administrating hepatitis B vaccine to susceptible children and of using antihaemophilic factor heat-treated to reduce infectivity in those children who have never been treated and without signs of active viral infections.