The frequency of different types of squamous cell carcinoma according to their triggering factors in patients with dark complexion skin


  • Thamir Kubaisi University of Anbar
  • Khalifa Sharquie Department of Dermatology, College of Medicine, University of Baghdad, Center of Dermatology, Medical City Teaching Hospital, Baghdad, Iraq.


Squamous cell carcinoma, Triggering factors, Sunlight exposure, ; Lichen planus, Old burn scar


Background Squamous cell carcinoma is not an uncommon type of non-melanoma skin cancer that could be induced by different triggering factors. The frequency of these different types of triggering factors is not well established in the dermatological literatures Objective To gather all patients with squamous cell carcinoma and try to classify them according to their triggering factors Patients and methods This is a cross-sectional study that was carried out during the period from 2014-2023 where all patients with squamous cell carcinoma were collected and analyzed into groups according to their triggering factors. Nearly all patients were Fitzpatrick skin type III and IV. Full demographic and clinical data were studied and evaluated. A histopathological assessment was done as a confirmatory measure. Results Full analysis and evaluation were carried out for 95 cases of squamous cell carcinoma and classified into the following groups: lower lip sunlight-induced SCC in 44(46.3%) cases, ordinary SCC without triggering factor in 22(23.1%), lichen planus induced SCC in 17(17.89%) and burn-induced in 12(12.63%) patients with SCC. Conclusion Cutaneous squamous cell carcinoma is not a common tumor but is frequently triggered by sunlight exposure, lichen planus and old burn scar.


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How to Cite

Kubaisi T, Sharquie K. The frequency of different types of squamous cell carcinoma according to their triggering factors in patients with dark complexion skin. J Pak Assoc Dermatol [Internet]. 2023Oct.12 [cited 2023Nov.28];33(4):1535-41. Available from:



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