Introduction: Marjolin’s ulcer is the malignant transformation of a burn scar or any other wound or chronic ulceration. Material and methods: This is a retrospective study spread over 2 years from January 2020 to January 2022 on 13 files of patients hospitalized in the plastic surgery department of Marrakech. Results: 13 patients, male in 77% of cases, the average age was 52 with extremes between 25 and 74 years old, the main location was the lower limb in 46% of cases, the scalp in 39% and the upper limb in 15%, the average size of the tumor was 11,5cm with extremes between 5 and 30cm, in 85% of cases it was a squamous cell carcinoma, lymph node dissection was performed in 61.5%, surgical excision required amputation in 5 cases, 2 in the upper limb and 3 in the lower limb due to bone invasion, an extension assessment was performed for all patients, positive in 70% of cases, coverage required direct sutures in 40%, grafts in 30%, and flaps in 30%. The evolution was marked by recurrence in 2 cases. All patients were referred for adjuvant treatment. Conclusion: Marjolin’s ulcer remains a rare but very locally aggressive tumor with significant metastatic potential.