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Mika Niemelä

Helsinki University and Helsinki University Hospital

67H-index
484Paper Count
1.6WCitation Count
Published Papers 154
Publication Date
Genome-wide association study links COL6A6 and PIK3R4 to delayed cerebral ischaemia
errBrain
IF11.7
err2026-05-26
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errJoan Jiménez-Balado; Marc Arreaza-Baena; Mark K Bakker; Ynte M Ruigrok; Marta Vallverdú-Prats; Angel Ois; Adrià Macias-Gómez; Isabel Fernández-Pérez; Daniel Guisado-Alonso; Ana Rodriguez-Campello; Eva Giralt-Steinhauer; Jordi Jiménez-Conde; Philippe Bijlenga; Sandrine Morel; Behnam Rezai Jahromi; Mika Niemelä; David J Werring; Isabel C Hostettler; Elisa Cuadrado-Godia; null
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Risk factors for postoperative epidural hematoma after microsurgical decompression of lumbar spinal stenosis
err2026-01-01
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errVasankari, Ville; Oulasvirta, Elias; Krishnan, Aravind; Resendiz-Nieves, Julio; Marjamaa, Johan; Antinheimo, Jussi; Korja, Miikka; Raj, Rahul; Siironen, Jari; Niemela, Mika
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MRI radiomic signature predicts peritumoral brain edema resolution following meningioma surgery
err2025-12-03
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errGarcia-Garcia, Sergio; Laajava, Joonas; Takala, Juuso; Niemela, Mika; Korja, Miikka
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How to support neurosurgical residents' psychological capital? An ethnographic study of Finnish neurosurgeons' coaching and mentoring
err2025-12-01
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PREAI
errMygrijev, Maarit; Uusiautti, Satu; Netti, Eliisa; Sorto, Pia; Kovalainen, Anselmi; Huhtakangas, Justiina; Niemela, Mika
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Restarting anticoagulation early versus late in patients with chronic subdural hematoma and atrial fibrillation (RELACS): a phase III international multicenter, randomized controlled, two-arm, assessor-blinded trial
err2025-11-17
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errRaj, Rahul; Tommiska, Pihla; Kivisaari, Riku; Korja, Miikka; Luostarinen, Teemu; Virta, Jyri J.; Taimela, Simo; Jarvinen, Teppo L. N.; Niemela, Mika; Koivisto, Timo; Leinonen, Ville; Saemundsson, Bjartur; Fletcher-Sandersjoo, Alexander; Korhonen, Tommi; Tetri, Sami; Rauhala, Minna; Laukka, Dan; Czuba, Tomasz; Bartek, Jiri; Danner, Nils; Knuutinen, Oula; Luoto, Teemu; Posti, Jussi P.; Satopaa, Jarno
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External validation of a grading system predicting ischemia following middle cerebral artery aneurysm clipping
err2025-11-01
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PREAI
errHuhtakangas, Justiina; Korja, Miikka; Numminen, Jussi; Nurminen, Ville; Lehecka, Martin; Laakso, Aki; Kivipelto, Leena; Niemela, Mika; Raj, Rahul
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Intracranial Aneurysm Wall Phenotypes: Clinical, Morphological, and Hemodynamic Influences
err2025-11-01
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PREAI
errKarnam, Yogesh; Mut, Fernando; Yu, Alexander K.; Cheng, Boyle; Amin-hanjani, Sepideh; Van Keulen, Marte; Charbel, Fady T.; White, Timothy; Niemela, Mika; Tulamo, Riikka; Jahromi, Behnam Rezai; Frosen, Juhana; Tobe, Yasutaka; Robertson, Anne M.; Cebral, Juan R.
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Psychiatric disorders after traumatic intracranial hemorrhage: the HEAD Helsinki study
err2025-10-18
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errKinnunen, Janne; Putaala, Jukka; Marinkovic, Ivan; Satopaa, Jarno; Niemela, Mika; Vataja, Risto
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CD4+T-lymphocytes in human saccular intracranial aneurysm walls are associated with aneurysm rupture
err2025-06-01
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errFirtser, Nora; Netti, Eliisa; Kekalainen, Eliisa; Lehti, Satu; Kovanen, Petri T.; Niemela, Mika; Tulamo, Riikka
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Evaluation of a novel high speed burr tip for safe and efficient bone surgery in a sheep model
err2025-05-15
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errVartiainen, Nuutti; Niemela, Mika; Palvimaki, Esa-Pekka
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KRIT1 heterozygous mutations are sufficient to induce a pathological phenotype in patient-derived iPSC models of cerebral cavernous malformation
err2025-05-01
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PREAI
errArce, Maximiliano; Erzar, Iza; Yang, Fan; Senthilkumar, Neeharika; Onyeogaziri, Favour C.; Ronchi, Dario; Ahlstrand, Frida C.; Noll, Nora; Lugano, Roberta; Richards, Mark; Scola, Elisa; Corada, Monica; Lazzaroni, Francesca; Meggiolaro, Linda; Schuster, Jens; Dahl, Niklas; Niemela, Mika; Jahromi, Behnam Rezai; Dimberg, Anna; Lanfraconi, Silvia; Latini, Roberto; Magnusson, Peetra U.
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Cancer-type somatic mutations in saccular cerebral aneurysms
err2024-12-12
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errJahromi, Behnam Rezai; Valori, Miko; Tulamo, Riikka; Jauhiainen, Suvi; Ilmonen, Henna; Kantonen, Jonas; Kaikkonen-Maatta, Minna; Laakso, Aki; Yla-Hertuala, Seppo; Jaaskelainen, Juha E.; Tienari, Pentti J.; Niemela, Mika
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Pharmacological blocking of neutrophil extracellular traps attenuates immunothrombosis and neuroinflammation in cerebral cavernous malformation
err2024-12-04
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errOnyeogaziri, Favour C.; Smith, Ross; Arce, Maximiliano; Huang, Hua; Erzar, Iza; Rorsman, Charlotte; Malinverno, Matteo; Orsenigo, Fabrizio; Sundell, Veronica; Fernando, Dinesh; Daniel, Geoffrey; Niemela, Mika; Laakso, Aki; Jahromi, Behnam Rezai; Olsson, Anna-Karin; Magnusson, Peetra U.
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Frailty indices predict mortality, complications and functional improvements in supratentorial meningioma patients over 80 years of age
err2024-09-04
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errSchwartz, Christoph; Ueberschaer, Moritz F.; Rautalin, Ilari; Grauvogel, Juergen; Bissolo, Marco; Masalha, Waseem; Steiert, Christine; Schnell, Oliver; Beck, Juergen; Ebel, Florian; Bervini, David; Raabe, Andreas; Eibl, Thomas; Steiner, Hans-Herbert; Schebesch, Karl-Michael; Shlobin, Nathan A.; Nandoliya, Khizar R.; Youngblood, Mark W.; Chandler, James P.; Magill, Stephen T.; Romagna, Alexander; Lehmberg, Jens; Fuetsch, Manuel; Spears, Julian; Rezai, Arwin; Ladisich, Barbara; Demetz, Matthias; Griessenauer, Christoph J.; Niemela, Mika; Korja, Miikka
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Delayed Cerebral Infarction After Aneurysmal Subarachnoid Hemorrhage: Location, Distribution Patterns, Infarct Load, and Effect on Outcome
err2024-08-13
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PREAI
errVeldeman, Michael; Rossmann, Tobias; Haeren, Roel; Vossen, Laura V.; Weiss, Miriam; Conzen, Catharina; Siironen, Jari O.; Korja, Miikka; Schmidt, Tobias P.; Hoellig, Anke; Virta, Jyri J.; Satopaeae, Jarno; Luostarinen, Teemu; Wiesmann, Martin; Clusmann, Hans; Niemela, Mika; Raj, Rahul
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An International, Multicenter Feasibility Study on Active and Continuous Irrigation With Cerebrospinal Fluid Exchange for Improving Outcomes in Cerebral Ventriculitis
err2024-07-15
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PREAI
errBaig, Ammad A.; Hess, Ryan M.; Sprau, Annelise C.; Kemeny, Hanna; Hashmi, Eisa; Nazari, Pouya; Lim, Jaims; Turner, Ryan C.; Brandmeir, Nicholas; Jahromi, Behnam Rezai; Niemela, Mika; Jahromi, Babak S.; Levy, Elad I.; Siddiqui, Adnan H.
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Intracranial Arteriovenous Malformations During Pregnancy and Puerperium-A Retrospective Nationwide Population-Based Cohort Study
err2024-06-27
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PREAI
errPohjola, Anni; Vest, Teresa; Verho, Liisa; Aarnio, Karoliina; Rantanen, Kirsi; Laivuori, Hannele; Gissler, Mika; Laakso, Aki; Niemela, Mika; Ijas, Petra
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Long-term treatment outcomes and natural course of low-grade intracranial dural arteriovenous fistulas
err2024-03-01
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errRossmann, Tobias; Veldeman, Michael; Oulasvirta, Elias; Nurminen, Ville; Rauch, Philip-Rudolf; Gruber, Andreas; Lehecka, Martin; Niemela, Mika; Numminen, Jussi; Raj, Rahul
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