Morphea patients with mucocutaneous involvement: A cross-sectional study from the Morphea in Adults and Children (MAC) cohort.

Background: Demographic and clinical findings of patients with mucocutaneous morphea have not been well characterized, to our knowledge.

Objective: To determine the demographic and clinical characteristics of morphea patients with mucocutaneous lesions who were enrolled in the Morphea in Adults and Children cohort.

Methods: Cross-sectional study of 735 patients in the Morphea in Adults and Children cohort from 2007 to 2018.

Results: A total of 4.6% of linear morphea patients had oral involvement versus 2.4% among the entire cohort, whereas 10.3% of generalized morphea patients had genital involvement versus 3.7% among the entire cohort. Patients with genital lesions were older at disease onset than those with oral morphea (57 versus 11.5 years; P < .001) and had more frequent extragenital lichen sclerosus et atrophicus (59.2% versus 5.6%; P = .004).

Limitations: Selection bias and limited number of affected subjects.

Conclusion: Oral morphea lesions predominate in younger patients with facial linear morphea, whereas genital lesions predominate in postmenopausal women with overlying extragenital lichen sclerosus et atrophicus.