system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 32-year-old man comes to the physician because of a 3-week history of recurrent thumb pain that worsens with exposure to cold temperatures. Examination shows a 6-mm, blue-red papule under the left thumbnail. The overlying area is extremely tender to palpation. The thumbnail is slightly pitted and cracked. This lesion most likely developed from which of the following types of cells?
assistant
Modified smooth muscle cells