MARIO GILBERTO SIQUEIRA
Projetos de Pesquisa
Unidades Organizacionais
Instituto Central, Hospital das Clínicas, Faculdade de Medicina - Médico
LIM/45 - Laboratório de Fisiopatologia Neurocirúrgica, Hospital das Clínicas, Faculdade de Medicina
LIM/62 - Laboratório de Fisiopatologia Cirúrgica, Hospital das Clínicas, Faculdade de Medicina
LIM/45 - Laboratório de Fisiopatologia Neurocirúrgica, Hospital das Clínicas, Faculdade de Medicina
LIM/62 - Laboratório de Fisiopatologia Cirúrgica, Hospital das Clínicas, Faculdade de Medicina
6 resultados
Resultados de Busca
Agora exibindo 1 - 6 de 6
article Comparison Between Supraclavicular Versus Video-Assisted Intrathoracic Phrenic Nerve Section for Transfer in Patients With Traumatic Brachial Plexus Injuries: Case Series COMMENT(2020) KRETSCHMER, Thomas; SIQUEIRA, Mario G.article Masseter-to-Facial Cranial Nerve Anastomosis: A Report of 30 Cases COMMENT(2020) SIQUEIRA, Mario G.; TELICH-TARRIBA, Jose E.; CARDENAS-MEJIA, Alexander- Fibrolipomatous hamartoma of the median nerve: An unusual cause of carpal tunnel syndrome(2023) SIQUEIRA, Mario Gilberto; MARTINS, Roberto Sergio; FORONI, Luciano; OLIVEIRA, Adilson J. M. de; LORDELO, Gustavo; HEISE, Carlos OttoFibrolipomatous hamartoma is a rare benign tumor-like condition that affects most commonly the median nerve. The diagnosis is usually confirmed through its typical appearance on magnetic resonance imaging (MRI) without the need for a nerve biopsy. There are divergent views regarding treatment of this entity, but open carpal tunnel release for nerve decompression currently constitutes the standard care for alleviation of compressive neuropathy of the median nerve. In this report, we describe a case of fibrolipomatous hamartoma that was diagnosed via MRI and underwent open carpal tunnel release, with alleviation of the patient's symptoms.
- Treatment of radiation-induced brachial plexopathy with omentoplasty(2020) OLIVEIRA, Adilson José Manuel de; CASTRO, João Paulo de Souza; FORONI, Luciano Henrique; SIQUEIRA, Mário Gilberto; MARTINS, Roberto SérgioABSTRACT Radiation-induced brachial plexus neuropathy (RIBPN) is a rare and delayed non-traumatic injury to the brachial plexus, which occurs following radiation therapy to the chest wall, neck, and/or axilla in previously treated patients with cancer. The incidence of RIBPN is more common in patients treated for carcinoma of the breast and Hodgkin lymphoma. With the improvement in radiation techniques, the incidence of injury to the brachial plexus following radiotherapy has dramatically reduced. The currently reported incidence is 1.2% in women irradiated for breast cancer. The progression of symptoms is gradual in about two-thirds of cases; the patients may initially present with paresthesia followed by pain, and later progress to motor weakness in the affected limb. We present the case of a 68-year-old female patient with breast cancer submitted to surgery, chemotherapy, and radiotherapy in the year 2000. Eighteen years later, she developed symptoms and signs compatible with RIBPN and was successfully submitted to omentoplasty for pain control. Omentoplasty is an alternative treatment for RIBPN refractory to conservative treatment, which seems to be effective in improving neuropathic pain. However, postoperative worsening of the motor strength is a real possibility, and all candidates for this type of surgery must be informed about the risk of this complication.
- Effectiveness of the histamine test for diagnosing root avulsion in patients with traumatic brachial plexus injury(2020) STERMAN-NETO, H.; HEISE, C. O.; SIQUEIRA, M. G.; MARTINS, R. S.; TAVARES, P. L.; FORONI, L. H.Objectives: Making the diagnosis of root avulsion in traumatic brachial plexus injuries is important but sometimes difficult. The histamine test for differentiating between pre- and post-ganglionic lesions is a simple, fast and low-cost procedure. We conducted a study on patients with traumatic brachial plexus injury in order to evaluate the effectiveness of this test. Patients and methods: A total of 60 patients were initially evaluated. The subjects underwent clinical examination, myelo-CT and myelo-MRI, as well as the histamine test. The latter was applied to dermatomes C5 to T1, and occurrences of secondary neurogenic erythema were noted. The results were compared with surgical and imaging findings. Results: No statistical significance could be found for C5 and C6 roots, compared with surgical evaluation. The results for C5 showed that this may be useful for determining avulsion. Although significant results were found between the histamine test and imaging findings for all roots except for C6, the specificity of 0% for C8 and T1 is not helpful in clinical practice. Conclusion: Histamine test seems to be useful for C5 root assessment, since neurophysiological assessment of that root is difficult. There was no significance for C6 root and disappointing specificity for the C8-T1 level.
- Functional outcome of spinal accessory nerve transfer to the suprascapular nerve to restore shoulder function: Results in upper and complete traumatic brachial plexus palsy in adults(2019) SIQUEIRA, Mario G.; MARTINS, Roberto S.; SOLLA, Davi; FAGLIONI, Wilson; FORONI, Luciano; HEISE, Carlos O.Background: Shoulder stability, abduction and external rotation are vital for the performance of usual daily tasks. Aims: To compare the functional outcomes in the shoulder following spinal accessory to suprascapular nerve transfer (SASNT). Patients and Methods: Comparison of the outcome of adult patients with upper traumatic brachial plexus palsy undergoing SASNT with patients with complete palsy submitted to the same procedure. Statistical Analysis: Ranges of motion were compared via the Mann-Whitney U test. The percentages of patients with a favorable outcome were compared by the chi-square test. All tests were two-tailed and P values <0.05 were considered statistically significant. Results: SASNT was performed in 76 patients: 23 cases (30.2%) of upper-plexus injuries and 53 cases (69.7%) of complete brachial plexus palsy. Good shoulder abduction was achieved in 15 patients (65.2%) with upper plexus palsy and a good external rotation in 5 (21.7%). In those patients with a good recovery, the average range of motion (ROM) was 53 degrees for shoulder abduction and 71.2 degrees for external rotation. Thirty-six patients (67.9%) with complete palsy had a good shoulder abduction recovery with 30.7 degrees of average ROM, but only 3 patients (5.6%) recovered a good shoulder external rotation with 68.3 degrees of average ROM. There was no statistical difference for the abduction outcome, but the external rotation outcome was superior in the upper plexus palsy group. Conclusion: SASNT is a consistent procedure to achieve functional recovery of shoulder abduction after a partial or complete plexus injury, but the outcomes of external rotation were quite disappointing in both the groups.