Ole Helmer Sjo

  • Senior consultant; MD, PhD

Publications 2024

Grønvold LAB, Mjørud Forsmo H, Pfeffer F, Norderval S, Sjo O, Brunborg C, Brudvik KW, Thomas Seeberg L (2024)
Aggregated 1-year complication rates and health-related quality of life after reconstructive surgery for rectal cancer with or without diverting stoma (Norwegian Stoma Trial): a protocol for national multicentre, open-label, prospective cohort study
BJS Open, 8 (1)
DOI 10.1093/bjsopen/zrae010, PubMed 38386703

Langerud J, Eilertsen IA, Moosavi SH, Klokkerud SMK, Reims HM, Backe IF, Hektoen M, Sjo OH, Jeanmougin M, Tejpar S, Nesbakken A, Lothe RA, Sveen A (2024)
Multiregional transcriptomics identifies congruent consensus subtypes with prognostic value beyond tumor heterogeneity of colorectal cancer
Nat Commun, 15 (1), 4342
DOI 10.1038/s41467-024-48706-2, PubMed 38773143

Viktil E, Hanekamp BA, Nesbakken A, Løberg EM, Sjo OH, Negård A, Dormagen JB, Schulz A (2024)
Early rectal cancer: The diagnostic performance of MRI supplemented with a rectal micro-enema and a modified staging system to identify tumors eligible for local excision
Acta Radiol Open, 13 (5), 20584601241241523
DOI 10.1177/20584601241241523, PubMed 38645439

Publications 2021

Skjold-Odegaard B, Ersdal HL, Assmus J, Nedrebo BSO, Sjo O, Soreide K (2021)
Development and clinical implementation of a structured, simulation-based training programme in laparoscopic appendectomy: description, validation and evaluation
BMJ Simul Technol Enhanc Learn, 7 (6), 517-523
DOI 10.1136/bmjstel-2020-000728, PubMed 35520958

Publications 2019

Wasmuth HH, Faerden AE, Myklebust TÅ, Pfeffer F, Norderval S, Riis R, Olsen OC, Lambrecht JR, Kørner H, Larsen SG, Norwegian TaTME Collaborative Group, on behalf of the Norwegian Colorectal Cancer Group, Forsmo HM, Baekkelund O, Lavik S, Knapp JC, Sjo O, Rashid G (2019)
Transanal total mesorectal excision for rectal cancer has been suspended in Norway
Br J Surg, 107 (1), 121-130
DOI 10.1002/bjs.11459, PubMed 31802481

Publications 2017

Vedeld HM, Merok M, Jeanmougin M, Danielsen SA, Honne H, Presthus GK, Svindland A, Sjo OH, Hektoen M, Eknaes M, Nesbakken A, Lothe RA, Lind GE (2017)
CpG island methylator phenotype identifies high risk patients among microsatellite stable BRAF mutated colorectal cancers
Int J Cancer, 141 (5), 967-976
DOI 10.1002/ijc.30796, PubMed 28542846

Publications 2014

Hveem TS, Merok MA, Pretorius ME, Novelli M, Bævre MS, Sjo OH, Clinch N, Liestøl K, Svindland A, Lothe RA, Nesbakken A, Danielsen HE (2014)
Prognostic impact of genomic instability in colorectal cancer
Br J Cancer, 110 (8), 2159-64
DOI 10.1038/bjc.2014.133, PubMed 24642618

Publications 2012

Merok MA, Ahlquist T, Røyrvik EC, Tufteland KF, Hektoen M, Sjo OH, Mala T, Svindland A, Lothe RA, Nesbakken A (2012)
Microsatellite instability has a positive prognostic impact on stage II colorectal cancer after complete resection: results from a large, consecutive Norwegian series
Ann Oncol, 24 (5), 1274-82
DOI 10.1093/annonc/mds614, PubMed 23235802

Sjo OH, Merok MA, Svindland A, Nesbakken A (2012)
Prognostic impact of lymph node harvest and lymph node ratio in patients with colon cancer
Dis Colon Rectum, 55 (3), 307-15
DOI 10.1097/DCR.0b013e3182423f62, PubMed 22469798

Publications 2011

Faerden AE, Sjo OH, Bukholm IR, Andersen SN, Svindland A, Nesbakken A, Bakka A (2011)
Lymph node micrometastases and isolated tumor cells influence survival in stage I and II colon cancer
Dis Colon Rectum, 54 (2), 200-6
DOI 10.1007/DCR.0b013e3181fd4c7c, PubMed 21228669

Sjo OH, Berg M, Merok MA, Kolberg M, Svindland A, Lothe RA, Nesbakken A (2011)
Peritoneal carcinomatosis of colon cancer origin: highest incidence in women and in patients with right-sided tumors
J Surg Oncol, 104 (7), 792-7
DOI 10.1002/jso.21959, PubMed 21547915

Publications 2010

Berg M, Danielsen SA, Ahlquist T, Merok MA, Ågesen TH, Vatn MH, Mala T, Sjo OH, Bakka A, Moberg I, Fetveit T, Mathisen Ø, Husby A, Sandvik O, Nesbakken A, Thiis-Evensen E, Lothe RA (2010)
DNA sequence profiles of the colorectal cancer critical gene set KRAS-BRAF-PIK3CA-PTEN-TP53 related to age at disease onset
PLoS One, 5 (11), e13978
DOI 10.1371/journal.pone.0013978, PubMed 21103049

Publications 2008

Faerden AE, Sjo OH, Andersen SN, Hauglann B, Nazir N, Gravdehaug B, Moberg I, Svinland A, Nesbakken A, Bakka A (2008)
Sentinel node mapping does not improve staging of lymph node metastasis in colonic cancer
Dis Colon Rectum, 51 (6), 891-6
DOI 10.1007/s10350-007-9185-0, PubMed 18259817

Sjo OH, Larsen S, Lunde OC, Nesbakken A (2008)
Short term outcome after emergency and elective surgery for colon cancer
Colorectal Dis, 11 (7), 733-9
DOI 10.1111/j.1463-1318.2008.01613.x, PubMed 18624817

Publications 2007

Sjo OH, Lunde OC, Nygaard K, Sandvik L, Nesbakken A (2007)
Tumour location is a prognostic factor for survival in colonic cancer patients
Colorectal Dis, 10 (1), 33-40
DOI 10.1111/j.1463-1318.2007.01302.x, PubMed 17672872

Publications 2003

Sjo OH, Nesbakken A, Lunde OC, Nygaard K, Mala T (2003)
Komplikasjoner etter operasjon for cancer coli
In Vitenskapelige forhandlinger, Norsk kirurgisk forening., [Oslo], 2003, Abstrakt 146
BIBSYS 041735544

Publications 2002

Jensen H, Sjö O, Uldall P, Gram L (2002)
Vigabatrin and retinal changes
Doc Ophthalmol, 104 (2), 171-80
DOI 10.1023/a:1014679804792, PubMed 11999624

Publications 1999

Erdal J, Ostergaard L, Fuglsang-Frederiksen A, Werdelin L, Dalager T, Sjö O, Regeur L (1999)
Long-term botulinum toxin treatment of cervical dystonia--EMG changes in injected and noninjected muscles
Clin Neurophysiol, 110 (9), 1650-4
DOI 10.1016/s1388-2457(99)00127-3, PubMed 10479034

Sjo OH, Ivarsson LE, Sundhagen JO, Mikkelsen EM (1999)
[Necrotising fasciitis--a surgical challenge]
Tidsskr Nor Laegeforen, 119 (18), 2660-3
PubMed 10479979

Publications 1998

Fuglsang-Frederiksen A, Ostergaard L, Sjö O, Werdelin L, Winkel H (1998)
Quantitative electromyographical changes in cervical dystonia after treatment with botulinum toxin
Electromyogr Clin Neurophysiol, 38 (2), 75-9
PubMed 9553744

Publications 1996

Magalhães PJ, Sjö O, Nørby S (1996)
Ocular myopathy and mitochondrial DNA deletion. A presentation of seven identified Danish patients
Acta Ophthalmol Scand Suppl (219), 29-32
PubMed 8741113

Ostergaard L, Fuglsang-Frederiksen A, Sjö O, Werdelin L, Winkel H (1996)
Quantitative EMG in cervical dystonia
Electromyogr Clin Neurophysiol, 36 (3), 179-85
PubMed 8737940

Publications 1995

Jensen H, Warburg M, Sjö O, Schwartz M (1995)
Duchenne muscular dystrophy: negative electroretinograms and normal dark adaptation. Reappraisal of assignment of X linked incomplete congenital stationary night blindness
J Med Genet, 32 (5), 348-51
DOI 10.1136/jmg.32.5.348, PubMed 7616540

Publications 1994

Nørby S, Lestienne P, Nelson I, Nielsen IM, Schmalbruch H, Sjö O, Warburg M (1994)
Juvenile Kearns-Sayre syndrome initially misdiagnosed as a psychosomatic disorder
J Med Genet, 31 (1), 45-50
DOI 10.1136/jmg.31.1.45, PubMed 8151637

Ostergaard L, Fuglsang-Frederiksen A, Werdelin L, Sjö O, Winkel H (1994)
Quantitative EMG in botulinum toxin treatment of cervical dystonia. A double-blind, placebo-controlled study
Electroencephalogr Clin Neurophysiol, 93 (6), 434-9
DOI 10.1016/0168-5597(94)90150-3, PubMed 7529693

Publications 1993

Warburg M, Sjö O, Fledelius HC, Pedersen SA (1993)
Autosomal recessive microcephaly, microcornea, congenital cataract, mental retardation, optic atrophy, and hypogenitalism. Micro syndrome
Am J Dis Child, 147 (12), 1309-12
DOI 10.1001/archpedi.1993.02160360051017, PubMed 8249951

Publications 1991

Warburg M, Sjö O, Tranebjaerg L (1991)
Chromosome 6q deletion and retinal cone dystrophy
Am J Med Genet, 38 (1), 134
DOI 10.1002/ajmg.1320380127, PubMed 2012125

Warburg M, Sjö O, Tranebjaerg L, Fledelius HC (1991)
Deletion mapping of a retinal cone-rod dystrophy: assignment to 18q211
Am J Med Genet, 39 (3), 288-93
DOI 10.1002/ajmg.1320390309, PubMed 1867279

Publications 1990

Warburg M, Tranebjaerg L, Sjö O (1990)
Retinal cone dystrophy and chromosome 6(q26) deletions
Ann Genet, 33 (2), 124
PubMed 2241088

Publications 1988

Hertz BG, Rosenberg J, Sjö O, Warburg M (1988)
Acuity card testing of patients with cerebral visual impairment
Dev Med Child Neurol, 30 (5), 632-7
DOI 10.1111/j.1469-8749.1988.tb04801.x, PubMed 3229561

Publications 1986

Smith T, Zeeberg I, Sjö O (1986)
Evoked potentials in multiple sclerosis before and after high-dose methylprednisolone infusion
Eur Neurol, 25 (1), 67-73
DOI 10.1159/000115989, PubMed 3940867

Tranebjaerg L, Sjø O, Warburg M (1986)
Retinal cone dysfunction and mental retardation associated with a de novo balanced translocation 1;6(q44;q27)
Ophthalmic Paediatr Genet, 7 (3), 167-73
DOI 10.3109/13816818609004134, PubMed 3561951

Publications 1984

Kamieniecka Z, Sjö O (1984)
Mitochondrial myopathy as a cause of ptosis and ophthalmoplegia in elderly females
Acta Ophthalmol (Copenh), 62 (3), 401-12
DOI 10.1111/j.1755-3768.1984.tb08420.x, PubMed 6464689

Serup J, Serup L, Sjö O (1984)
Localized scleroderma 'en coup de sabre' with external eye muscle involvement at the same line
Clin Exp Dermatol, 9 (2), 196-200
DOI 10.1111/j.1365-2230.1984.tb00783.x, PubMed 6713721

Publications 1976

Ahlgren P, Sjö O (1976)
Moyamoya disease: bilateral occlusion of the carotid artery associated with abnormal vascular network in the basal region of the brain
Dan Med Bull, 23 (1), 41-5
PubMed 1253625

Naestoft J, Hvidberg EF, Sjö O (1976)
Saturable metabolic pathways for ethotoin in man
Clin Exp Pharmacol Physiol, 3 (5), 453-9
DOI 10.1111/j.1440-1681.1976.tb00623.x, PubMed 10117

Sjö O, Buchthal F, Henriksen O, Sejrsen P (1976)
The absence of fibres in the sural nerve mediating vasoconstriction
Acta Physiol Scand, 98 (3), 379-80
DOI 10.1111/j.1748-1716.1976.tb10323.x, PubMed 998287

Publications 1975

Sjö O, Hvidberg EF, Naestoft J, Lund M (1975)
Pharmacokinetics and side-effects of clonazepam and its 7-amino-metabolite in man
Eur J Clin Pharmacol, 8 (3-4), 249-54
DOI 10.1007/BF00567123, PubMed 1233220

Publications 1974

Christiansen C, Rodbro P, Sjö O (1974)
"Anticonvulsant action" of vitamin D in epileptic patients? A controlled pilot study
Br Med J, 2 (5913), 258-9
DOI 10.1136/bmj.2.5913.258, PubMed 4207965

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