Squamous Cell Carcinoma of the Pinna in a Patient with Jorge Lobo Disease: Case Report

Abstract

Introduction: Lobomycosis (also called Jorge Lobo’s Disease) is a chronic granulomatous disease caused by the fungus Lacazia loboi, affecting mainly rural workers, generally after local trauma to exposed skin areas, more common in men, aged 20 to 40, characterized by slow progression over the years, of varied skin lesions, notably nodules and coalescent plaques with a keloid appearance. It is known that chronic lesions such as these can become malignant, resulting mainly in squamous cell carcinoma. After analyzing skin cancers, it is suggested that lobomycosis also correlates with carcinogenesis, although it is little described in the literature and a complete elucidation has not yet been achieved. Case report: Male patient, 63 years old, born in Pará, rural worker, suffering from lobomycosis with a previous history of basal cell carcinoma with squamous differentiation in the right earlobe and pre-auricular region, having undergone resection of the lesion with margins in 2018, but evolving after nearly three years with the appearance, on the same sites, of a new tumor lesion, this time with greater aggressiveness and pathology compatible with squamous cell carcinoma. Conclusion: Considering the rarity of lobomycosis in non-Amazonian areas, the case in question is essential to demonstrate that this condition can be associated with skin neoplasms, contributing as a risk factor due to the formation of scars and chronic ulcers, in addition to warning on the need for early diagnosis and treatment to avoid carcinomatous degeneration.