Clinical Neuroscience

[Symptomatic subependymomas of the ventricles. Review of twenty consecutive cases]


NOVEMBER 28, 2014

Clinical Neuroscience - 2014;67(11-12)

[Background and purpose - Intraventricular subependymomas are rare benign tumors, which are often misdiagnosed as ependymomas. To review the clinicopathological features of subependymomas. Patient selection and methods - Retrospective clinical analysis of intraventricular subependymomas and systematic review of histological slides operated on at our center between 1985 and 2005. Results - Twenty subependymomas presented at the median age of 50 years (range 19-77). Two (10%) were found in the third, three (15%) in the forth, and 15 in the lateral ventricles. There was male preponderance (12 vs. 8). Ataxia (n=13) and papilledema (n=7) were the most common clinical presentations. Fifteen patients underwent gross total resection, and five had subtotal resection. None of the cases showed mitotic figures, vascular endothelial proliferation or necrosis. Cell proliferation marker MIB-1 activity (percentage of positive staining tumor cells) ranged from 0 to 1.4% (mean 0.3). Two cases were treated with preoperative radiation therapy (50 Gy) before the CT era, three other patients received postoperative radiation therapy for tumors originally diagnosed histologically as low grade ependymomas. Three patients (15%) died of surgical complication between one and three months postoperatively, and three patients died of unrelated causes in eight, 26 and 110 months. Fifteen patients were alive without evidence of tumor recurrence at a median follow-up time of 10 years. Conclusion - Subependymomas are low-grade lesions and patients do well without adjuvant radiotherapy. Small samples from more cellular areas may be confused with low grade ependymomas, and unnecessary radiotherapy may follow. Recurrences, rapid growth rates should warrant histological review, as hypocellular areas of ependymomas may also be a source of confusion.]



Further articles in this publication

Clinical Neuroscience

[Meeting of the Hungarian Epilepsy League]


Clinical Neuroscience

[The interactive neuroanatomical simulation and practical application of frontotemporal transsylvian exposure in neurosurgery]


[Background and purpose - There is an increased need for new digital education tools in neurosurgical training. Illustrated textbooks offer anatomic and technical reference but do not substitute hands-on experience provided by surgery or cadaver dissection. Due to limited availability of cadaver dissections the need for development of simulation tools has been augmented. We explored simulation technology for producing virtual reality-like reconstructions of simulated surgical approaches on cadaver. Practical application of the simulation tool has been presented through frontotemporal transsylvian exposure. Methods - The dissections were performed on two cadaveric heads. Arteries and veins were prepared and injected with colorful silicon rubber. The heads were rigidly fixed in Mayfield headholder. A robotic microscope with two digital cameras in inverted cone method of image acquisition was used to capture images around a pivot point in several phases of dissections. Multilayered, high-resolution images have been built into interactive 4D environment by custom developed software. Results - We have developed the simulation module of the frontotemporal transsylvian approach. The virtual specimens can be rotated or tilted to any selected angles and examined from different surgical perspectives at any stage of dissections. Important surgical issues such as appropriate head positioning or surgical maneuvers to expose deep situated neuroanatomic structures can be simulated and studied by using the module. Conclusion - The simulation module of the frontotemporal transsylvian exposure helps to examine effect of head positioning on the visibility of deep situated neuroanatomic structures and study surgical maneuvers required to achieve optimal exposure of deep situated anatomic structures. The simulation program is a powerful tool to study issues of preoperative planning and well suited for neurosurgical training.]

Clinical Neuroscience

[Tailored cranioplasty using CAD-CAM technology]


[Objective - The majority of cranial defects are results of surgical intervention. The defect must be covered within resonable period of time usually after 4-6 week given the fact that the replacement of bone improve the brain circulation. Number of surgical techniques and materials are available to perform cranioplasty. Due to favorable properties we chosed ultra high molecular weight polyethylene as material. In this paper the authors show a procedure which allows tailored artificial bone replacement using state of art medical and engineering techniques. Methods - between 2004 and 2012, 19 patients were operated on cranial bone defect and a total of 22 3D custom- designed implants were implanted. The average age of patients was 35.4 years. In 12 patients we performed primary cranioplasty, while seven patients had the replacement at least once. Later the implants had to be removed due to infection or other causes (bone necrosis, fracture). All patients had native and bone- windowed 1 mm resolution CT. The 3D design was made using the original CT images and with design program. Computer controlled lathe was used to prepare a precise-fitting model. During surgery, the defect was exposed and the implant was fixed to normal bone using mini titanium plates and screws. All of our patients had control CT at 3, 6 and12 months after surgery and at the same time neurological examination. Results - Twenty-one polyethylene and one titanium implants were inserted. The average follow-up of the patients was 21.5 months, ranged from two to 96 months. We follow 12 patients (63.15%) more than one year. No intraoperative implant modifications had to be made. Each of the 22 implant exactly matched the bone defect proved by CT scan. No one of our patients reported aesthetic problems and we did not notice any kind of aesthetic complication. We had short term complication in three cases due to cranioplasty, subdural, epidural haemorrhage and skin defect. Conclusion - Polyethylene is in all respects suitable for primary and secondary cranioplasty. Combined with 3D CADCAM method excellent aesthetic and functional result was achieved. In our study no case of infection occured. Proper preoperative preparation is important.]

Clinical Neuroscience

[Neurocognitive impairments of HIV infected individuals - Preliminary results of a national prevalence study in Hungary]

LAKATOS Botond, SZABÓ Zsuzsa, BOZZAI Barbara, BÁNHEGYI Dénes, GAZDAG Gábor

[Background and purpose - The outcome of HIV infection has dramatically improved due to the widespread use of combined antiretroviral therapy (cART). Opportunistic infections faded and internal and hemato-oncological diseases along with neurological conditions came to the forth. Present study is to evaluate neurocognitive performance of the Hungarian HIV infected individuals, at first in this setting. Patients and methods - We performed this cross-sectional pilot study within the frames of a national, single-center; prospective study on group of HIV infected patients, analyzing medical data and neurocognitive performance. Based on international recommendations visual memory, visuomotor coordination, non-verbal learning ability, executive functions and reaction time were tested by six domains of a computerized neuropsychological test battery (Vienna Test System). Results - Data of 59 enrolled HIV individuals were analysed; nine of whom were women (15%), median age 42.6 (IQR: 32.4-48.1) years. In 32.2% (n=19) of patients neurocognitive impairment was detected. Duration of infection and cART treatment time tended to be longer in impaired group (not significant). Lower CD4 cell count at the time of examination (p=0.047), psychiatric diseases other than depression (p=0.005) were found significantly associated with impairment; tertiary education qualification were more common (p=0.033) among non-affected patients. By correlation analysis age, infected time and duration of cART were significantly associated with motor deficit. Conclusion - HAND was detected in almost one third part of examined patients, which largely corresponds that in developed countries were observed. Duration of infection and of cART therapy associated motor deficit was found to be the most common impairment. This finding might be interpreted by direct effect of HIV, neurotoxicity of antiretrovirals and also by accelerated ageing of this population.]

Clinical Neuroscience

[A rare paroxysmal movement disorder: Mixed type of paroxysmal dyskinesia]

AYSU Sen, DILEK Atakli, BAHAR Guresci, BAKI Arpaci

[Paroxysmal dyskinesias are rare, heterogeneous group of disorders characterised by recurrent attacks of involuntary movements. The four classic categories of paroxysmal dyskinesias are kinesigenic, nonkinesigenic, exercise-induced and hypnogenic. There are some patients that do not fit in these four groups of paroxysmal dyskinesia and are termed as “mixed type”. We describe a 13-year-old girl who had features of both paroxysmal kinesigenic dyskinesia and paroxysmal nonkinesigenic dyskinesia that was misdiagnosed as refractory epilepsy. She improved substantially with a combination of carbamazepine and clonazepame. It is important to recognize the clinical presentation of paroxysmal dyskinesias and distinguish these movement disorders from other disorders, such as psychogenic disorders and epilepsia, for deciding the treatment and prognosis of the patients. This case highlights the importance of the recognition of a rare paroxysmal movement disorders.]

All articles in the issue

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Clinical Neuroscience

Association of anterior thoracic meningocele and azygos lobe of the lung

DENIZ Ersay Fatih, SENAYLI Atilla, BICAKCI Ünal

Here we report an anterior thoracic meningocele case. Twoyears- old female patient was presented with kyphosis. Azygos lobe of the lung was also demonstrated during radiological studies. Posterolateral thoracotomy incision and extralpeural approach was performed for excision of the anterior meningocele to untether the cord. Although both anomalies are related to faulty embryogenesis and it is well known that faulty embryogenesis may also reveal coexisting abnormalities, we could not speculate a common mechanism for anterior thoracic meningocele and azygos lobe of the lung association.

Clinical Oncology

[Treatment of childhood tumors of mesenchymal origin]

CSÓKA Monika

[Mesenchymal cells can be differentiated into skeletal muscle, smooth muscle, adipose tissue, fi brous tissue, bone and cartilage. Tumors can be originated from these tissues as benign tumors - fibroma, lipoma, osteoma, chondroma, haemangioma, myoma, etc. or as malignant tumors - in childhood, most commonly rhabdomyosarcomas, osteosarcoma, Ewing sarcoma, less often fi brosarcoma, liposarcoma or other rare types. Clinically, the outcome of these tumors have improved signifi cantly in the last decade due to the use of multi-modality treatment (chemotherapy, surgery, irradiation, in some cases targeted therapy). The better treatment results are based on early diagnosis and adequate management according to international treatment protocols in pediatric oncology centers.]

Lege Artis Medicinae

[The multidisciplinary pathological examination of colorectal carcinomas - From the biopsy sample to the K-RAS mutation analysis]


[BACKGROUND - The role of pathologist in the reporting of colorectal carcinomas (CRC) has dramatically changed in the past 20 years. This change has been generated by the enormous progress in the surgical, radiological, oncological and pathological techniques and their interactions. AIM - To interpret the role of pathologist in the colorectal multidisciplinary team. METHODS - The most important histopathological prognostic and predictive factors, the surgical planes, the involvement of circumferencial margin, the regression grade after neoadjuvant chemoradiotherapy were assessed in 964 patients treated with operable colorectal cancer during 2001-2007 in the County Hospital of Baranya and the four nearby city hospitals. RESULTS - Most of our patients (>75%) were treated with advanced stage tumors. The lymph nodes were harvested through careful slicing, visual inspection and palpation - accordingly the average lymph node count increased from 7.45 to 19.0. After using elastic fibre stain we detected twice as much vascular invasion then before. The results of the surgical quality after TME and APER were somewhat dissapointing. Although the ratio of the specimens resected in the mesoretal fascial plane was comparable to the international results (39.8%), the ratio of resections in the muscularis propria plane was unacceptably high (47.8%) and it was more pronounced (50-100%) between the low volume surgeons of the small city hospitals. The involvement of the circumferencial resection margin was affected by the advanced pT and pN stage, the vascular invasion, the surgical plane, the type and number of resection performed by the surgeons, the regression grade after preoperative chemoradiotherapy and the gender. CONCLUSIONS - In addition to the traditional histopathological features the pathologist has to investigate the quality features of the preopreative assessment, the surgical planes of excision and the grade of regression after neoadjuvant chemoradiation and feed back these results to the members of the CRC multidisciplinary team. The optimal treatment of the CRC can be achived only in this setting.]

Clinical Oncology

[Treatment of locally advanced rectum cancer]

FRÖBE Ana, JURETIC Antonio, BROZIC Marić Jasmina, SOLDIC Zeljko, ZOVAK Mario

[Over the last several decades, local control (LC) for rectal cancer has markedly improved because of advances in surgical technique and the adoption of adjuvant or neoadjuvant chemoradiotherapy (CRT). Total mesorectal excision (TME) during surgical resection of localized rectal cancer, which involves removal of the entire circumferential perirectal tissue envelope, decreases rates of both involved surgical margins and local recurrences. Similarly, for patients with locally advanced rectal cancer (LARC), including T3 and T4 tumors and lymph node-positive disease, adjuvant and more preferably neoadjuvant CRT has exhibited the ability to both improve disease-free survival (DFS) and LC. Some patients undergoing neoadjuvant CRT achieve a complete pathologic response (pCR) to CRT and the oncologic outcomes are particularly favourable in this group. In contrast to improved local control, patients’ overall survival rates are in need of improvement, and the major factor limiting the outcome is the appearance of metachronous distant metastases. The main approach to overcome this issue is the escalation of systemic therapy in the neoadjuvant setting, e.g. by addition of induction or consolidation chemotherapy before or after neoadjuvant chemoradiotherapy (the so-called total neoadjuvant treatment, TNT, approach). The aim was to present a short overview of the role of radiotherapy and radiochemotherapy in the management of rectal cancer with a focus on current treatment stand wasards for locally advanced rectal cancer.]

Lege Artis Medicinae


NÉMETH Hajnalka, KOVÁCS Erzsébet, SÁPY Péter, PÁSZTOR Éva, DEZSŐ Balázs, SZŐLLŐSI Zoltán, PFLIEGLER György

[INTRODUCTION - Liposarcoma is a malignant soft tissue tumour, which represents less than 0.1% of all human cancers. Approximately 20% of liposarcomas arise in the retroperitoneum. Radical surgical excision is potentially curative, making it the first choice of treatment. For local tumour control palliative chemo- and/or radiotherapy can be used. CASE REPORT - A 28-year-old man with a history of weight loss, fatigue and abdominal tightness was diagnosed to have a giant dedifferentiated retroperitoneal liposarcoma, which showed aggressive growth and gave local recurrences. Multiple surgical excisions were performed, the first two times with curative, subsequently with palliative intent. To reduce the retroperitoneal tumour mass, several chemotherapeutic regimens were applied with complementary radiotherapy. As a result of the combinational therapy, tumour growth stopped temporarily, pressure pain subsided and the patient's quality of life was satisfactory. Finally, distant metastases developed in the bones of the right hip, in the lung and on the serous membranes and after 44 months of follow-up the patient died. CONCLUSION - It has been postulated that ifosfamide and doxorubicin based combined chemotherapy prevents or postpones the development of distant metastases. Considering the significant risk of local and distant recurrences, the use of ifosfamide-doxorubicin based combined chemotherapy is recommended in highgrade retroperitoneal liposarcoma, even following complete surgical excision.]