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. 2025 Apr 29;11(2):e005544. doi: 10.1136/rmdopen-2025-005544

Table 2. Histological characteristics of the thumb pulley system.

Presence of fibrocartilage at the enthesis Description of the enthesis
Yes No Not available
A1 6 2 / Fibrous and fibrocartilaginous enthesis (volar plate/sesamoid bone)
Av 3 1 4 Fibrous and fibrocartilaginous enthesis
Obl 5 2 1 Fibrous and fibrocartilaginous enthesis
A2 / / 8

Four hands (2 right/2 left), 4 thumbs, 16 pulleys.

Not available: data lost due to cutting, sample preparation, staining and processing.