1961. Cardiotoxicity of concomitant radiotherapy and trastuzumab for early breast cancerTanja Marinko, Jure Dolenc, Cvetka Bilban-Jakopin, 2014, original scientific article Abstract: Background. Trastuzumab therapy given in combination with one of several chemotherapy regimens is currently considered the standard of care for the treatment of early-stage, human epidermal growth factor receptor-2 (HER2) -positive breast cancer. The treatment with trastuzumab is due to a significant impact on the survival part of the standard adjuvant treatment of patients with HER2-positive breast cancer. Patients treated with postoperative breast or chest wall irradiation receive trastuzumab concomitant with radiotherapy. In a small proportion of patients trastuzumab causes cardiotoxicity. Preclinical findings indicate a radiosensibilizing effect of trastuzumab in breast cancer cells, but it is not yet clear whether it radiosensibilizes cells of healthy tissues too.Conclusions. Special attention is required when left breast or left thoracic wall is irradiated in patient receiving trastuzumab, because long-term effects of the concurrent treatment with trastuzumab and radiotherapy are not yet known. In an era where more patients are surviving a diagnosis of breast cancer, better understanding and earlier detection of therapy-induced cardiac toxicity will be of paramount importance.
Keywords: radiotherapy, cardiotoxicity, trastuzumab, early breast cancer
Published in DiRROS: 11.04.2024; Views: 482; Downloads: 236
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1962. Capecitabine in adjuvant radiochemotherapy for gastric adenocarcinomaIrena Oblak, Marija Skoblar Vidmar, Franc Anderluh, Vaneja Velenik, Ana Jeromen, Jasna But-Hadžić, 2014, original scientific article Abstract: Background. In patients with non-metastatic gastric cancer surgery still remains the treatment of choice. Postoperative radiochemotherapy with 5-fluorouracil and leucovorin significantly improves the treatment outcome. The oral fluoropyrimidines, such as capecitabine, mimic continuous 5-fluorouracil infusion, are at least as effective as 5-fluorouracil, and such treatment is more comfortable for the patients. Patients and methods. In the period from October 2006 to December 2009, 101 patients with gastric cancer in stages Ib-IIIc were treated with postoperative chemoradiation with capecitabine. Distal subtotal resection of the stomach was performed in 46.3%, total resection in 50.5% and multivisceral resection in 3.2% of patients. The main endpoints of this study were loco-regional control (LRC), disease-free survival (DFS), disease-specific survival (DSS) and overall survival (OS). The rates of acute side-effects were also estimated. Results. Seventy-seven percent of patients completed the treatment according to the protocol. The median followup time of all patients was 3.9 years (range: 0.4-6.3 years) and in survivors it was 4.7 years (range: 3.2-6.3 years). No death occurred due to the therapy. Acute toxicity, such as nausea and vomiting, stomatitis, diarrhoea, hand-foot syndrome and infections of grade 3 or 4, occurred in 5%, 1%, 2%, 8.9% and 18.8% of patients, respectively. On the close-out date 63.4% patients were still alive and with no signs of the disease. The 4-years follow-up survey showed that LRC, DFS, DSS and OS were 95.5%, 69.2%, 70.7%, and 66.2%, respectively. Higher pN-stage and splenectomy were found to be independent prognostic factors for all four types of survival and perineural invasion and lower treatment intensity for DFS, DSS and OS.
Keywords: gastric cancer, adjuvant therapy, radiochemotherapy
Published in DiRROS: 11.04.2024; Views: 416; Downloads: 164
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1963. Osteoblastic bone metastases from renal cell carcinomaVladka Salapura, Irena Preložnik Zupan, Boštjan Šeruga, Gorana Gašljević, Pavel Kavčič, 2014, original scientific article Abstract: Background. RCC accounts for only 2-3% of all cancers. Due to its non-specific symptoms disease is often diagnosed in advanced stage. Disseminated RCC frequently produces bone metastases that are almost always highly destructive, hyper vascularized and purely osteolytic. Case report. In this article we describe a case of a 71-year old male patient with disseminated osteoblastic bone metastases from renal cell carcinoma (RCC), and present a short review of published literature reporting cases of osteoblastic bone metastases from RCC. Our patient presented with thoracic pain aggravated by movement. He was diagnosed with predominantly osteoblastic bone metastases in the skeleton of thoracic and lumbar vertebra along with metastases in iliac bones, ribs, humerus and clavicles. Initially, origin of bone metastases was unknown, but later a small tumor in patients right kidney was identified. Microscopic evaluation of the open bone biopsy showed clear cell RCC with sarcomatoid differentiation. Conclusions. Although, due to its rarity, RCC is not included in the primary differential diagnosis in patients with osteoblastic metastases, such rare cases suggest that RCC may be considered in the diagnosis when there no other primary tumor is found.
Published in DiRROS: 11.04.2024; Views: 529; Downloads: 147
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1964. Distant metastasis of rectal adenocarcinoma in a temporary tracheostomaRobert Šifrer, Primož Strojan, Nina Zidar, Miha Žargi, Aleš Grošelj, Milena Krajinović, 2014, review article Keywords: temporary tracheostoma, distant metastasis, rectal adenocarcinoma, rak (medicina), traheostoma, zasevki, metastaziranje, žlezni rak
Published in DiRROS: 11.04.2024; Views: 494; Downloads: 251
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1965. Minimally invasive CT guided treatment of intraspinal synovial cystSergeja Kozar, Miran Jeromel, 2014, original scientific article Abstract: Background. Intraspinal synovial cysts of vertebral facet joints are uncommon cause of radicular pain as well as neurological deficits. They can be managed both conservatively and surgically.Case report. A 77-year old polymorbid patient presented with bilateral low back pain which worsened during the course of time and did not respond to the conservative treatment. A diagnosis of intraspinal synovial cyst was made using the magnetic resonance imaging (MRI). Percutaneous computed tomography (CT) guided injection with installation of local anesthetic together with corticosteroid and rupture of the cyst was successfully used. A month after the procedure his pain improved, the usage of analgesics diminished and his over-all quality of life improved.Conclusions. Percutaneous CT guided lumbar synovial cyst treatment is safe and reliable alternative to the surgical treatment in polymorbid patients with radiculopathy who are not able to tolerate general anesthesia and operation.
Keywords: ciste, intraspinalne sinovialne ciste, bolečina, zdravljenje, radiologija
Published in DiRROS: 11.04.2024; Views: 417; Downloads: 240
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1966. Incidental uptake of 18F-fluorocholine (FCH) in the head or in the neck of patients with prostate cancerMarina Hodolič, Jurij Fettich, 2014, original scientific article Abstract: Background. Positron emission tomography-computed tomography (PET/CT) with 18F-fluorocholine (FCH) is routinely performed in patients with prostate cancer. In this clinical context, foci of FCH uptake in the head or in the neck were considered as incidentalomas, except for those suggestive of multiple bone metastases. Case reports. In 8 patients the incidental focus corresponded to a benign tumour. The standard of truth was histologyin two cases, correlative imaging with MRI in four cases, 99mTc-SestaMIBI scintigraphy, ultrasonography and biochemistry in one case and biochemistry including PTH assay in one case. The final diagnosis of benign tumoursconsisted in 3 pituitary adenomas, 2 meningiomas, 2 hyperfunctioning parathyroid glands and 1 thyroid adenoma. Malignancy was proven histologically in 2 other patients: 1 papillary carcinoma of the thyroid and 1 cerebellar metastasis.Conclusions. To the best of our knowledge, FCH uptake by pituitary adenomas or hyperfunctioning parathyroidglands has never been described previously. We thus discuss whether there might be a future indication for FCH PET/CT when one such tumour is already known or suspected: to detect a residual or recurrent pituitary adenoma aftersurgery, to guide surgery or radiotherapy of a meningioma or to localise a hyperfunctioning parathyroid gland. Inthese potential indications, comparative studies with reference PET tracers or with 99mTc-sestaMIBI in case of hyperparathyroidism could be undertaken.
Keywords: FCH, PET/CT, incidentaloma, meningioma, pituitary adenoma, hyperparathyroidism, thyroid adenoma
Published in DiRROS: 10.04.2024; Views: 520; Downloads: 133
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1968. Clonality analysis of lymphoid proliferations using BIOMED-2 clonality assays : a single institution experienceIra Kokovič, Barbara Jezeršek Novaković, Petra Škerl, Srdjan Novaković, 2014, professional article Keywords: onkologija, rak (medicina), limfom, diagnostika, analiza, molekularne metode, molekularna diagnostika
Published in DiRROS: 10.04.2024; Views: 416; Downloads: 151
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1969. Domains without parabolic minimal submanifolds and weakly hyperbolic domainsFranc Forstnerič, 2023, original scientific article Abstract: We show that if $\Omega$ is an $m$-convex domain in $\mathbb{R}^n$ for some $2 \le m < n$ whose boundary $b\Omega$ has a tubular neighbourhood of positive radius and is not $m$-flat near infinity, then $\Omega$ does not contain any immersed parabolic minimal submanifolds of dimension $\ge m$. In particular, if $M$ is a properly embedded non-flat minimal hypersurface in $\mathbb{R}^n$ with a tubular neighbourhood of positive radius, then every immersed parabolic hypersurface in $\mathbb{R}^n$ intersects $M$. In dimension $n=3$, this holds if $M$ has bounded Gaussian curvature function. We also introduce the class of weakly hyperbolic domains $\Omega$ in $\mathbb{R}^n$, characterised by the property that every conformal harmonic map $\mathbb{C} \to \Omega$ is constant, and we elucidate their relationship with hyperbolic domains, and domains without parabolic minimal surfaces.
Keywords: minimal surfaces, m-plurisubharmonic functions, hyperbolic domain
Published in DiRROS: 10.04.2024; Views: 828; Downloads: 544
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1970. The Waring problem for matrix algebras, IIMatej Brešar, Peter Šemrl, 2023, original scientific article Abstract: Let $f$ be a noncommutative polynomial of degree $m\ge 1$ over an algebraically closed field $F$ of characteristic $0$. If $n\ge m-1$ and $\alpha_1,\alpha_2,\alpha_3$ are nonzero elements from $F$ such that $\alpha_1+\alpha_2+\alpha_3=0$, then every trace zero $n\times n$ matrix over $F$ can be written as $\alpha_1 A_1+\alpha_2A_2+\alpha_3A_3$ for some $A_i$ in the image of $f$ in $M_n(F)$.
Keywords: Waring problem, noncommutatative polynomials, matrix algebras
Published in DiRROS: 10.04.2024; Views: 450; Downloads: 197
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