Publication list - Publika - Scientific publications from Oslo University Hospital

Publications by Per Helsing

66 publications found

Original articles

Christensen E, Mørk E, Foss OA, Mørk C, Kroon S, Dotterud LK, Helsing P, Vatne Ø, Skogvoll E, Mjønes P, Bachmann IM (2024)
New, simplified versus standard photodynamic therapy (PDT) regimen for superficial and nodular basal cell carcinoma (BCC): A single-blind, non-inferiority, randomised controlled multicentre study
PLoS One, 19 (3), e0299718
DOI 10.1371/journal.pone.0299718, PubMed 38457386

Dalmasso B, Pastorino L, Nathan V, Shah NN, Palmer JM, Howlie M, Johansson PA, Freedman ND, Carter BD, Beane-Freeman L, Hicks B, Molven A, Helgadottir H, Sankar A, Tsao H, Stratigos AJ, Helsing P, Van Doorn R, Gruis NA, Visser M, Wadt KAW, Mann G, Holland EA, Nagore E, Potrony M et al. (2021)
Germline ATM variants predispose to melanoma: a joint analysis across the GenoMEL and MelaNostrum consortia
Genet Med, 23 (11), 2087-2095
DOI 10.1038/s41436-021-01240-8, PubMed 34262154

Robsahm TE, Helsing P, Svendsen HL, Veierød MB (2021)
Clinical Suspicion Sensitivity of Nodular and Superficial Spreading Melanoma
Acta Derm Venereol, 101 (4), adv00427
DOI 10.2340/00015555-3782, PubMed 33686445

Landi MT, Bishop DT, MacGregor S, Machiela MJ, Stratigos AJ, Ghiorzo P, Brossard M, Calista D, Choi J, Fargnoli MC, Zhang T, Rodolfo M, Trower AJ, Menin C, Martinez J, Hadjisavvas A, Song L, Stefanaki I, Scolyer R, Yang R, Goldstein AM, Potrony M, Kypreou KP, Pastorino L, Queirolo P et al. (2020)
Genome-wide association meta-analyses combining multiple risk phenotypes provide insights into the genetic architecture of cutaneous melanoma susceptibility
Nat Genet, 52 (5), 494-504
DOI 10.1038/s41588-020-0611-8, PubMed 32341527

Rizvi SM, Veierød MB, Mørk G, Helsing P, Gjersvik P (2019)
Ablative Fractional Laser-assisted Daylight Photodynamic Therapy for Actinic Keratoses of the Scalp and Forehead in Organ Transplant Recipients: A Pilot Study
Acta Derm Venereol, 99 (11), 1047-1048
DOI 10.2340/00015555-3274, PubMed 31386164

Robsahm TE, Helsing P, Nilssen Y, Vos L, Rizvi SMH, Akslen LA, Veierød MB (2018)
High mortality due to cutaneous melanoma in Norway: a study of prognostic factors in a nationwide cancer registry
Clin Epidemiol, 10, 537-548
DOI 10.2147/CLEP.S151246, PubMed 29780262

Roscher I, Falk RS, Vos L, Clausen OPF, Helsing P, Gjersvik P, Robsahm TE (2018)
Validating 4 Staging Systems for Cutaneous Squamous Cell Carcinoma Using Population-Based Data: A Nested Case-Control Study
JAMA Dermatol, 154 (4), 428-434
DOI 10.1001/jamadermatol.2017.6428, PubMed 29516080

Veierød MB, Page CM, Aaserud S, Bassarova A, Jacobsen KD, Helsing P, Robsahm TE (2018)
Melanoma staging: Varying precision and terminal digit clustering in Breslow thickness data is evident in a population-based study
J Am Acad Dermatol, 79 (1), 118-125.e1
DOI 10.1016/j.jaad.2018.03.023, PubMed 29580861

Rizvi SMH, Aagnes B, Holdaas H, Gude E, Boberg KM, Bjørtuft Ø, Helsing P, Leivestad T, Møller B, Gjersvik P (2017)
Long-term Change in the Risk of Skin Cancer After Organ Transplantation: A Population-Based Nationwide Cohort Study
JAMA Dermatol, 153 (12), 1270-1277
DOI 10.1001/jamadermatol.2017.2984, PubMed 29049612

Mantaka P, Malecka A, Trøen G, Helsing P, Gjersvik P, Beiske K, Delabie J (2017)
Folliculotropic Mycosis Fungoides with Skewed T-cell Receptor CDR3 Motif: Suggestive of Lipid-antigen Selection?
Acta Derm Venereol, 97 (9), 1081-1086
DOI 10.2340/00015555-2722, PubMed 28597017

Helsing P, Robsahm TE, Vos L, Rizvi SM, Akslen LA, Veierød MB (2016)
Cutaneous head and neck melanoma (CHNM): A population-based study of the prognostic impact of tumor location
J Am Acad Dermatol, 75 (5), 975-982.e2
DOI 10.1016/j.jaad.2016.06.048, PubMed 27546291

Law MH, Bishop DT, Lee JE, Brossard M, Martin NG, Moses EK, Song F, Barrett JH, Kumar R, Easton DF, Pharoah PDP, Swerdlow AJ, Kypreou KP, Taylor JC, Harland M, Randerson-Moor J, Akslen LA, Andresen PA, Avril MF, Azizi E, Scarrà GB, Brown KM, Dębniak T, Duffy DL, Elder DE et al. (2015)
Genome-wide meta-analysis identifies five new susceptibility loci for cutaneous malignant melanoma
Nat Genet, 47 (9), 987-995
DOI 10.1038/ng.3373, PubMed 26237428

Johnsrud I, Kulseth MA, Rødningen OK, Landrø L, Helsing P, Waage Nielsen E, Heimdal K (2015)
A Nationwide Study of Norwegian Patients with Hereditary Angioedema with C1 Inhibitor Deficiency Identified Six Novel Mutations in SERPING1
PLoS One, 10 (7), e0131637
DOI 10.1371/journal.pone.0131637, PubMed 26154504

Tagliabue E, Fargnoli MC, Gandini S, Maisonneuve P, Liu F, Kayser M, Nijsten T, Han J, Kumar R, Gruis NA, Ferrucci L, Branicki W, Dwyer T, Blizzard L, Helsing P, Autier P, García-Borrón JC, Kanetsky PA, Landi MT, Little J, Newton-Bishop J, Sera F, Raimondi S, M-SKIP Study Group (2015)
MC1R gene variants and non-melanoma skin cancer: a pooled-analysis from the M-SKIP project
Br J Cancer, 113 (2), 354-63
DOI 10.1038/bjc.2015.231, PubMed 26103569

Helsing P, Gjersvik P, Tarstedt M (2015)
Treatment of basal cell carcinoma in Scandinavia: evidence or eminence based?
Int J Dermatol, 54 (9), 1030-3
DOI 10.1111/ijd.12599, PubMed 25660368

Robsahm TE, Helsing P, Veierød MB (2015)
Cutaneous squamous cell carcinoma in Norway 1963-2011: increasing incidence and stable mortality
Cancer Med, 4 (3), 472-80
DOI 10.1002/cam4.404, PubMed 25620456

Rizvi SM, Veierød MB, Thorsby PM, Helsing P (2015)
Vitamin D in Norwegian renal transplant recipients: A longitudinal study with repeated measurements in winter and summer
Eur J Dermatol, 25 (3), 234-9
DOI 10.1684/ejd.2015.2524, PubMed 26412038

Mantaka P, Malecka A, Trøen G, Helsing P, Gjersvik P, Delabie J (2014)
Multiple distinct T-cell clones in folliculotropic mycosis fungoides
Am J Dermatopathol, 36 (12), 972-6
DOI 10.1097/DAD.0000000000000095, PubMed 25140661

Iles MM, Bishop DT, Taylor JC, Hayward NK, Brossard M, Cust AE, Dunning AM, Lee JE, Moses EK, Akslen LA, AMFS Investigators, Andresen PA, Avril MF, Azizi E, Scarrà GB, Brown KM, Dębniak T, Elder DE, Friedman E, Ghiorzo P, Gillanders EM, Goldstein AM, Gruis NA, Hansson J, Harland M et al. (2014)
The effect on melanoma risk of genes previously associated with telomere length
J Natl Cancer Inst, 106 (10)
DOI 10.1093/jnci/dju267, PubMed 25231748

Barrett JH, Taylor JC, Bright C, Harland M, Dunning AM, Akslen LA, Andresen PA, Avril MF, Azizi E, Bianchi Scarrà G, Brossard M, Brown KM, Dębniak T, Elder DE, Friedman E, Ghiorzo P, Gillanders EM, Gruis NA, Hansson J, Helsing P, Hočevar M, Höiom V, Ingvar C, Landi MT, Lang J et al. (2014)
Fine mapping of genetic susceptibility loci for melanoma reveals a mixture of single variant and multiple variant regions
Int J Cancer, 136 (6), 1351-60
DOI 10.1002/ijc.29099, PubMed 25077817

Sitek JC, Tangeraas T, Bjerre A, Helsing P (2014)
The prevalence of skin disorders in Norwegian paediatric renal transplant recipients
Acta Derm Venereol, 94 (4), 421-4
DOI 10.2340/00015555-1741, PubMed 24287733

Tronstad C, Helsing P, Tønseth KA, Grimnes S, Krogstad AL (2014)
Tumescent suction curettage vs. curettage only for treatment of axillary hyperhidrosis evaluated by subjective and new objective methods
Acta Derm Venereol, 94 (2), 215-20
DOI 10.2340/00015555-1671, PubMed 24002584

Helsing P, Togsverd-Bo K, Veierød MB, Mørk G, Haedersdal M (2013)
Intensified fractional CO2 laser-assisted photodynamic therapy vs. laser alone for organ transplant recipients with multiple actinic keratoses and wart-like lesions: a randomized half-side comparative trial on dorsal hands
Br J Dermatol, 169 (5), 1087-92
DOI 10.1111/bjd.12507, PubMed 23855503

Andresen PA, Nymoen DA, Kjærheim K, Leivestad T, Helsing P (2013)
Susceptibility to Cutaneous Squamous Cell Carcinoma in Renal Transplant Recipients Associates with Genes Regulating Melanogenesis Independent of their Role in Pigmentation
Biomark Cancer, 5, 41-7
DOI 10.4137/BIC.S12754, PubMed 24179397

Lützow-Holm C, Gjersvik P, Helsing P (2013)
Melanoma, mole or sebaceous wart?
Tidsskr Nor Laegeforen, 133 (11), 1167-8
DOI 10.4045/tidsskr.12.1484, PubMed 23759771

Mantaka P, Helsing P, Gjersvik P, Bassarova A, Clausen OP, Delabie J (2013)
Clinical and histopathological features of folliculotropic mycosis fungoides: a Norwegian patient series
Acta Derm Venereol, 93 (3), 325-9
DOI 10.2340/00015555-1476, PubMed 23053197

Iles MM, Law MH, Stacey SN, Han J, Fang S, Pfeiffer R, Harland M, Macgregor S, Taylor JC, Aben KK, Akslen LA, Avril MF, Azizi E, Bakker B, Benediktsdottir KR, Bergman W, Scarrà GB, Brown KM, Calista D, Chaudru V, Fargnoli MC, Cust AE, Demenais F, de Waal AC, Dębniak T et al. (2013)
A variant in FTO shows association with melanoma risk not due to BMI
Nat Genet, 45 (4), 428-32, 432e1
DOI 10.1038/ng.2571, PubMed 23455637

Raimondi S, Gandini S, Fargnoli MC, Bagnardi V, Maisonneuve P, Specchia C, Kumar R, Nagore E, Han J, Hansson J, Kanetsky PA, Ghiorzo P, Gruis NA, Dwyer T, Blizzard L, Fernandez-de-Misa R, Branicki W, Debniak T, Morling N, Landi MT, Palmieri G, Ribas G, Stratigos A, Cornelius L, Motokawa T et al. (2012)
Melanocortin-1 receptor, skin cancer and phenotypic characteristics (M-SKIP) project: study design and methods for pooling results of genetic epidemiological studies
BMC Med Res Methodol, 12, 116
DOI 10.1186/1471-2288-12-116, PubMed 22862891

Helsing P, Nymoen DA, Rootwelt H, Vårdal M, Akslen LA, Molven A, Andresen PA (2012)
MC1R, ASIP, TYR, and TYRP1 gene variants in a population-based series of multiple primary melanomas
Genes Chromosomes Cancer, 51 (7), 654-61
DOI 10.1002/gcc.21952, PubMed 22447455

Guleng GE, Helsing P (2012)
Photodynamic therapy for basal cell carcinomas in organ-transplant recipients
Clin Exp Dermatol, 37 (4), 367-9
DOI 10.1111/j.1365-2230.2011.04248.x, PubMed 22420420

Macgregor S, Montgomery GW, Liu JZ, Zhao ZZ, Henders AK, Stark M, Schmid H, Holland EA, Duffy DL, Zhang M, Painter JN, Nyholt DR, Maskiell JA, Jetann J, Ferguson M, Cust AE, Jenkins MA, Whiteman DC, Olsson H, Puig S, Bianchi-Scarrà G, Hansson J, Demenais F, Landi MT, Dębniak T et al. (2011)
Genome-wide association study identifies a new melanoma susceptibility locus at 1q21.3
Nat Genet, 43 (11), 1114-8
DOI 10.1038/ng.958, PubMed 21983785

Helsing P, Gjersvik P, Holm JØ, Steinkjer B, Holsen D, Johnsson M, Braun R, Vårdal M, Austad J (2010)
Variability in patch test reactions--first report from the Norwegian Patch Test Registry
Contact Dermatitis, 62 (5), 309-13
DOI 10.1111/j.1600-0536.2010.01711.x, PubMed 20536479

Helsing P, Nymoen DA, Ariansen S, Steine SJ, Maehle L, Aamdal S, Langmark F, Loeb M, Akslen LA, Molven A, Andresen PA (2008)
Population-based prevalence of CDKN2A and CDK4 mutations in patients with multiple primary melanomas
Genes Chromosomes Cancer, 47 (2), 175-84
DOI 10.1002/gcc.20518, PubMed 18023021

Helsing P, Frøen H (2007)
Dermatitis herpetiformis presenting as ataxia in a child
Acta Derm Venereol, 87 (2), 163-5
DOI 10.2340/00015555-0220, PubMed 17340026

Helsing P, Mørk G, Sveen B (2006)
Ruby laser treatment of congenital melanocytic naevi--a pessimistic view
Acta Derm Venereol, 86 (3), 235-7
DOI 10.2340/00015555-0041, PubMed 16710582

Helsing P (2004)
[Treatment of malignant melanoma]
Tidsskr Nor Laegeforen, 124 (22), 2916-7
PubMed 15550966

Helsing P, Kramer P, Haugstvedt A, Aarebrot S, Todal A, Moseng D, Loeb M (2004)
[Surgical treatment of basal cell carcinoma]
Tidsskr Nor Laegeforen, 124 (21), 2740-2
PubMed 15534663

Helsing P, Loeb M (2004)
Small diameter melanoma: a follow-up of the Norwegian Melanoma Project
Br J Dermatol, 151 (5), 1081-3
DOI 10.1111/j.1365-2133.2004.06248.x, PubMed 15541089

Helsing P, Mørk NJ, Flage T (2001)
[Pathological findings in the eye of children with facial nevus]
Tidsskr Nor Laegeforen, 121 (16), 1911-2
PubMed 11488182

Granlund H, Erkko P, Remitz A, Langeland T, Helsing P, Nuutinen M, Reitamo S (2001)
Comparison of cyclosporin and UVAB phototherapy for intermittent one-year treatment of atopic dermatitis
Acta Derm Venereol, 81 (1), 22-7
DOI 10.1080/00015550120235, PubMed 11411908

Faye RS, Helsing P, Langmark F (2000)
[Diagnostic delay in malignant melanoma]
Tidsskr Nor Laegeforen, 120 (9), 1023-5
PubMed 10833960

Helsing P (1997)
[Malignant melanoma. Diagnosis, treatment and follow-up]
Tidsskr Nor Laegeforen, 117 (21), 3107-8
PubMed 9381447

Helsing P, Faye R, Langmark F (1997)
Cutaneous malignant melanoma. Correlation between tumor characteristics and diagnostic delay in Norwegian patients
Eur. J. Dermatol., 7 (5), 359-361

Mørk NJ, Austad J, Helsing P, Kasbohm E (1996)
[Nevus flammeus in small children treated pulsed dye laser]
Tidsskr Nor Laegeforen, 116 (29), 3474-5
PubMed 9019852

Helsing P (1992)
[The dermatoscop. An instrument for examination of pigmented skin lesions]
Tidsskr Nor Laegeforen, 112 (10), 1306-7
PubMed 1533736

Helsing P, Gaustad P (1992)
Bullous impetigo caused by group A streptococci. A case report
Acta Derm Venereol, 72 (1), 50-1
PubMed 1350146

Helsing P, Austad J (1991)
Contact dermatitis mimicking photodermatosis in a 1-year-old child
Contact Dermatitis, 24 (2), 140-1
DOI 10.1111/j.1600-0536.1991.tb01673.x, PubMed 2040156

Review articles

Geisler J, Bachmann IM, Nyakas M, Helsing P, Fjøsne HE, Mæhle LO, Aamdal S, Eide NA, Svendsen HL, Straume O, Robsahm TE, Jacobsen KD, Akslen LA (2013)
Malignant melanoma--diagnosis, treatment and follow-up in Norway
Tidsskr Nor Laegeforen, 133 (20), 2154-9
DOI 10.4045/tidsskr.12.1416, PubMed 24172628

Gjersvik P, Helsing P, Holdaas H, Bergan S (2012)
[Immunosuppressive drugs and the development of skin cancer after organ transplantation]
Tidsskr Nor Laegeforen, 132 (18), 2064-8
DOI 10.4045/tidsskr.12.0389, PubMed 23038197

Roscher I, Brevig T, Mørk G, Helsing P, Gjersvik P (2011)
[Mohs surgery in basal cell carcinoma on the face]
Tidsskr Nor Laegeforen, 131 (24), 2475-9
DOI 10.4045/tidsskr.11.0343, PubMed 22170133

Christensen E, Warloe T, Kroon S, Funk J, Helsing P, Soler AM, Stang HJ, Vatne O, Mørk C, Norwegian Photodynamic Therapy (PDT) Group (2009)
Guidelines for practical use of MAL-PDT in non-melanoma skin cancer
J Eur Acad Dermatol Venereol, 24 (5), 505-12
DOI 10.1111/j.1468-3083.2009.03430.x, PubMed 19807828

Lützow-Holm C, Helsing P (2003)
[Congenital melanocytic nevi--what should be said and done?]
Tidsskr Nor Laegeforen, 123 (9), 1204-5
PubMed 12789791

Helsing P (1997)
[Etiology of malignant melanoma--what do we know?]
Tidsskr Nor Laegeforen, 117 (7), 969-71
PubMed 9103011