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Biomedical subjects

G Castagna

Publications and source records attributed to G Castagna.

35 records · Page 2Linked to original sources

[Vocal physiopathology].

Cordectomies usually result in alteration of the glottic sphincter which in turn effects the activity of the entire larynx bringing about different types of dysphonia according to the resulting scarring pattern in the glottic floor and to the functional recompensation made by the cordectomized patients themselves. Today, study of those anatomic dynamics which determine voice typology in cordectomized patients is possible thanks to various means: synthesis of data obtained from psycho-perspective analyses of the vocal product, video-fiber-laryngoscopic observation of the vocal tract and spectrographic study. The above-mentioned examinations show how the type of dysphonia in these patients is determined by the various combinations of different scarring patterns, which also depend on the entity of surgical exeresis, and the position taken on by various laryngeal district during phonation? The authors present paradigmatic clinical cases in order to demonstrate the different phonatory capabilities achieved by patients who had undergone either cordectomy or cordectomy extended to the ventricle and false vocal cords.

Humans↗

[The clinical presuppositions and results of logopedic therapy].

Logopedic therapy is proposed in helping cordectomized patients learn to best use pneumo-phonal structures to compensate for the glottic insufficiency often resulting from this type of surgery. Rehabilitation showed be initiated as soon as possible following surgery before the patients starts using compensation mechanisms negative for voice quality. However, precisely those patients often receive therapy tardively when the anatomo-functional results have already been consolidated and the voice quality is poor. The rehabilitation discussed uses classical feed back mechanisms through which the subjects learn to recognise those factors which enable them to better their voice quality. The type of exercises to be employed depends on whether or cordectomy extended to the ventricle and to false vocal cord. On the farmer case, the principle aim of therapy is that of nearing the healthy vocal cord to the neocord through appropriate exercises. On the better case, instead, the main vocal compensation is the result of the perfect coordination of expiratory energy and the activity of the healthy vocal cord. In fact, in extended cordectomized patients, in the light of the modest amount of scarring, it is necessary to cause the healty voice cord to shift entirely towards and beyond the median line as to as compensate for a sphincteric loss. The authors report two clinical case, particularly difficult from a rehabilitation point of view, in which, relatively speaking, in light of the initial voice conditions, satisfactory results were obtained.

Humans↗

[Clinical-experimental models for the identification of immunologic parameters to be integrated in traditional staging systems of colorectal neoplasms].

The Authors evaluate new possible models for the staging of colorectal cancer based on clinico-morphological, histo-pathological and bio-immunological parameters. Particularly, they evaluate the possibility of studying host's immunological response against tumor spread by the examination of the "in situ" cellular responses. This study was performed by cytotoxic test and immunohistochemical evaluation of the lymphocytes. The latter seems to give better results compared to the first in the evaluation of the host's immunological response.

Colorectal Neoplasms↗

[Blue nevus of the endocervix].

We report a case of blue nevus of the uterine cervix discovered in a cone removed for other reasons. The lesion can be interpreted as a visceral analogue of the cutaneous blue nevus. Histological and Immunohistological studies suggest the melanocytic nature of the lesion.

Biopsy↗