1,720,976 research outputs found
[Lymph node metastasis of adenoid cystic carcinoma].
No full textThe adenocystic carcinoma (ACC) of the head and of the neck is rather uncommon. It is characterized by a very slow biological behaviour, which leads to locoregional recurrences and distant metastasis. Most reports concentrate on the unpredictable long-term behaviour of this tumor, whereas lymph nodes metastasis are not usually discussed in detail. The aim of this study was to evaluate the difficulties connected with the lymph node metastasis in ACC.A group of 33 patients from 1980 to 1998, was observed. These patients have been subjected to surgical treatment in the Maxillo-Facial Surgery Department of the Policlinico-Umberto I of Rome.Among 33 patients with ACC, 10 patients (30\%) revealed, initially or during observation, cervical lymph node metastasis, which is a most common event in male subjects (70\%). The lymph node involvement is much more common in carcinomas localized in the parotid and in the sublingual glands with a solid rather than a tubular histologic pattern. Direct correlation between age and metastasis lymph node involvement have not been documented.Surgery for node disease has a very little impact on the locoregional and on the distant metastasis evolution of the tumor. Thus, our protocol of treatment of lymph nodes metastatic lesions follows the trend of most of the international authors, considering that the neck dissection should be performed only with a lymph adenopathy clinically evident or strongly suspected
Maxillofacial prosthetic Rehabilitation Using Extraoral Implants
No full textAB The prosthetic rehabilitation is a surgical alternative in functional-aesthetic facial reconstruction when the conventional reconstructive surgery cannot be applied either because of the psychophysical conditions of the patient or because of an excessive substance loss. From May 2002, 35 facial prosthesis (111 implants) have been positioned. Defects were congenital (N = 12), consequent to trauma (N = 8) and to demolitive surgery for malignant tumors (N= 8), and infection (N = 7). In 4 patients, implants were placed in previously irradiated areas. A total of 111 titanium implants were placed to support 21 auricular prostheses (bilateral in 2 cases), 4 orbital prostheses, 8 nasal prostheses, and 2 complex midfacial prostheses. Implant failure was observed for 2 of the 3 implants placed to support a nasal epithesis in a patient with hepatitis C virus, with an important parodontal disease, who experienced a postinfective necrosis of the nose after a liver transplantation; it was necessary to place an adhesive prosthesis. An implant failure was also observed in a diabetic patient with an extensive midfacial defects due to a mycotic infection, but it did not compromise the retention of the prosthesis. According to our experience, the indication to epithesis is when the conventional reconstructive interventions is inapplicable. (C) 2008 Mutaz B. Habal, M
Unknown posttraumatic foreign body in facial region
No full textThis study emphasizes the importance of scrupulous diagnostic first aid procedures to avoid the consequences of trauma due to a foreign body. Two patients were examined, both with facial trauma showing nonspecific symptoms. Through objective internal and external oral examination complete with clinical and radiographic examinations Three dimensional computed tomography (TC3D), foreign bodies unknown at the time of the trauma were identified. When the foreign bodies had been removed, the ache symptoms disappeared, restoring functionality and the patient's facial appearance. This study shows the need for detailed early diagnosis to achieve correct monitoring and therefore proper treatment for these patients
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Neutrophic spread of both neuroblastoma and adenoid cystic carcinoma in the maxillo-facial district: common aspects of pre- and post surgical Adjuvant treatment. Multidisciplinary study
No full text
- …
