Systemic Sclerosis - Sclerodactyly

A 48-year-old woman with a 6-year history of Raynaud phenomenon presents with progressive thickening and tightening of skin over her hands and forearms, dysphagia, gastroesophageal reflux, and exertional dyspnea. Examination reveals the finding marked **A** in the diagram—tight, shiny, adherent, indurated skin over the fingers and dorsum of hands extending to the elbows, with flexion contractures and tapered "clawed" digital tips. Nailfold capillaroscopy shows giant capillaries with dropout and hemorrhages. ANA is positive (1:1280, nucleolar pattern) and anti-topoisomerase I (Scl-70) is positive. HRCT chest shows basal subpleural reticulation and ground-glass opacities. Which of the following best describes the pathophysiologic basis of the finding marked **A** in this patient?