Per Helsing

Oslo, Norway

Last Updated: 09/26/2026

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Found 39 publications

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.

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.

Journal: PloS one

Published: August 26, 2023

Clinical versus Histological Assessment of Basal Cell Carcinoma Subtype and Thickness of Tumours Selected for Photodynamic Therapy.

Clinical versus Histological Assessment of Basal Cell Carcinoma Subtype and Thickness of Tumours Selected for Photodynamic Therapy.

Journal: Acta dermato-venereologica

Published: August 04, 2023

Cyclic photodynamic therapy delays first onset of actinic keratoses in renal transplant recipients: a 5-year randomized controlled trial with 12-month follow-up.

Cyclic photodynamic therapy delays first onset of actinic keratoses in renal transplant recipients: a 5-year randomized controlled trial with 12-month follow-up.

Journal: Journal of the European Academy of Dermatology and Venereology : JEADV

Published: June 26, 2022

Clinical Suspicion Sensitivity of Nodular and Superficial Spreading Melanoma.

Clinical Suspicion Sensitivity of Nodular and Superficial Spreading Melanoma.

Journal: Acta dermato-venereologica

Published: March 09, 2021

Germline ATM variants predispose to melanoma: a joint analysis across the GenoMEL and MelaNostrum consortia.

Germline ATM variants predispose to melanoma: a joint analysis across the GenoMEL and MelaNostrum consortia.

Journal: Genetics in medicine : official journal of the American College of Medical Genetics

Published: December 28, 2020

Ablative Fractional Laser-assisted Daylight Photodynamic Therapy for Actinic Keratoses of the Scalp and Forehead in Organ Transplant Recipients: A Pilot Study.

Ablative Fractional Laser-assisted Daylight Photodynamic Therapy for Actinic Keratoses of the Scalp and Forehead in Organ Transplant Recipients: A Pilot Study.

Journal: Acta dermato-venereologica

Published: August 07, 2019

Genome-wide association meta-analyses combining multiple risk phenotypes provide insights into the genetic architecture of cutaneous melanoma susceptibility.

Genome-wide association meta-analyses combining multiple risk phenotypes provide insights into the genetic architecture of cutaneous melanoma susceptibility.

Journal: Nature genetics

Published: July 10, 2019

Notice of Retraction and Replacement: Roscher et al. Validating 4 Staging Systems for Cutaneous Squamous Cell Carcinoma Using Population-Based Data: A Nested Case-Control Study. JAMA Dermatol. 2018;154(4):428-434.

Notice of Retraction and Replacement: Roscher et al. Validating 4 Staging Systems for Cutaneous Squamous Cell Carcinoma Using Population-Based Data: A Nested Case-Control Study. JAMA Dermatol. 2018;154(4):428-434.

Journal: JAMA dermatology

Published: November 13, 2018

High mortality due to cutaneous melanoma in Norway: a study of prognostic factors in a nationwide cancer registry.

High mortality due to cutaneous melanoma in Norway: a study of prognostic factors in a nationwide cancer registry.

Journal: Clinical epidemiology

Published: May 22, 2018

Validating 4 Staging Systems for Cutaneous Squamous Cell Carcinoma Using Population-Based Data: A Nested Case-Control Study.

Validating 4 Staging Systems for Cutaneous Squamous Cell Carcinoma Using Population-Based Data: A Nested Case-Control Study.

Journal: JAMA dermatology

Published: March 09, 2018

Melanoma staging: Varying precision and terminal digit clustering in Breslow thickness data is evident in a population-based study.

Melanoma staging: Varying precision and terminal digit clustering in Breslow thickness data is evident in a population-based study.

Journal: Journal of the American Academy of Dermatology

Published: January 17, 2018

Long-term Change in the Risk of Skin Cancer After Organ Transplantation: A Population-Based Nationwide Cohort Study.

Long-term Change in the Risk of Skin Cancer After Organ Transplantation: A Population-Based Nationwide Cohort Study.

Journal: JAMA dermatology

Published: October 20, 2017

Showing 1-12 of 39

Last Updated: 09/26/2026