Background: Only case reports or studies of small series of patients have focused on granuloma faciale (GF). Objective: We sought to describe the clinicopathologic characteristics ofGF in a large series of patients. M...
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Background: Only case reports or studies of small series of patients have focused on granuloma faciale (GF). Objective: We sought to describe the clinicopathologic characteristics ofGF in a large series of patients. Methods: We conducted a retrospective analysis of 66 patients and 73 skin specimens. Results: GF mostly presented as reddish plaques or nodules in middle-aged adults. One third of patients had multiple sites involved and 5 patients had extrafacial lesions. A clinical diagnosis of GF was made in only 10 cases; sarcoidosis, lymphoma, lupus, and basal cell carcinoma were the main differential diagnoses. The most frequent histopathologic features were the presence of a grenz zone, neutrophils, and telangiectases. Vascular changes were frequent, although necrotizing vasculitis appeared to be rare. There was often an association of acute and chronic inflammatory patterns, suggesting that GF follows a chronic history with reccurrent acute phases, rather than distinct successive acute and chronic stages. Limitations: In this retrospective study, a reliable analysis of the outcome of patients could not be performed. Results of direct immunofluorescence tests and laboratory investigations were lacking in many cases. Conclusion: GF is often clinically misdiagnosed; its morphologic spectrum is broader than usually described and includes a lack of eosinophils, the presence of vascular changeswith rare vessel wall necrosis, and associated acute and chronic inflammatory patterns.
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