The Dermatology and Skin Cancer Institute is committed to the advancement of scientific information. We believe that it is only through scientific research that progress can be made in the treatment and cure of dermatological disease.


Dr. De Wet is actively involved in research through the University of Stellenbosch. 
His main research interests include melanoma and Mohs micrographic surgery
Dr. De Wet received the Discovery Foundation Academic Fellowship award for his current research project:
“Treatment of Melanoma-in-Situ on the Head and Neck with Staged Micrographic Surgery: A retrospective study”.

Research projects include:

2010 – 2013:      Skin cancer audit in primary care (University of Queensland). Primary investigator.

2016 – 2018:      Skin cancer in a South African tertiary care dermatology clinic: A retrospective study (Stellenbosch University). Co-investigator.

2016 – 2017:      Clinical and pathological features of acral melanoma in a South African population: A retrospective study (Stellenbosch University). Primary investigator.

2016 – 2019:      Prospective Study: Clinical, histological and molecular analysis of melanomas involving the hands and feet in the Southern African population                                                 (Stellenbosch   University). Research assistant.

2019:                  Healthcare-worker awareness and knowledge of skin cancer in patients with darker skin types. Co-investigator.

2019:                  Vula referrals for dermatology to Tygerberg hospital are inefficient and not safe for ongoing use. Co-Supervisor.

2020:                  Treatment of Melanoma-in-Situ on the Head and Neck with Staged Contoured Micrographic Excision: A retrospective study.


Read more about Dr. Johann de Wet on ResearchGate.


  • de Wet J, Jordaan HF, Visser WI. Bilateral malar milia en plaque as primary presentation of discoid lupus erythematosus. JAAD case reports. 2017 Mar 10;3(2):106-109.
  • Spring IR*, de Wet J*, Jordaan HF, Tod B, Visser WI. Complete spontaneous regression of a metastatic acral melanoma with associated leukoderma. JAAD case reports. 2017 Nov 6;3(6):524-528.  *contributed equally as first author to this article.
  • de Wet J, Jordaan HF, Kannenberg SM, Tod B, Glanzmann B, Visser WI. Successful treatment of PASH syndrome in End-stage renal disease with Adalumimab. Dermatology Online Journal. 2017;1(24)
  • de Wet J, Tod B, Jordaan HF, Visser WI, Schneider JW. Clinical and pathological features of Acral Melanoma in a South African population: A retrospective study. S Afr Med J. 2018 Aug 28;108(9):777-781. doi: 10.7196/SAMJ.2018.v108i9.13435.
  • Du Toit JP, de Wet J, Visser WI. Surgical pearl: Retrograde punch biopsy technique for removal of enlarged earlobe piercings. J Am Acad Dermatol. 2018 Nov 2. pii: S0190-9622(18)32832-9. doi: 10.1016/j.jaad.2018.10.061.
  • Du Toit JP, de Wet J, Tod B. Sports dermatosis with a twist: Liquid latex-induced hair shaft entanglement. JAAD case reports. 2019 Nov 5(11). 945-946
  • de Wet J, Steyn M, Jordaan HF, R. Smith, Claasens S, Visser WI, An analysis of skin cancer biopsies in a tertiary care dermatology clinic in South Africa. Journal of Skin Cancer.
  • Claasens S, Kannenberg SMH, Jordaan HF, Moxley K, Smith R, de Wet J, Visser WI. The prevalence and spectrum of mucocutaneous disease in South African people living with HIV  and accessing care at a district-level hospital. South Afr J HIV Med. 2020 Dec 10;21(1):1154. doi: 10.4102/sajhivmed.v21i1.1154. PMID: 33354365; PMCID: PMC7736648.
  • de Wet J, Jordaan HF, Visser WI, Happle R. Phacomatosis pigmentovascularis is not a twin-spot phenomenon. Journal of Glaucoma
  • Tod B, Visser W, de Wet J, Kotze M, Bowcock A, Ayele B, McCaul M, Schneider J. Clinicopathological features and associations in a series of South African acral melanomas. Pigment Cell Melanoma Res. 2021 Jul 20. doi: 10.1111/pcmr.13003. Epub ahead of print. PMID: 34288507.
  • de Wet J, Swart CM, Jordaan HF, Schneider JW, Mulder S, Visser WI, A unique case of generalized hyperkeratotic and verrucous porokeratosis., JAAD Case Reports (2020), doi: