A Juxta-Articular Myxoma of the Thumb.

Juxta-articular myxomata are benign tumors that are mostly encountered in the vicinity of larger joints. Few cases in the hand have been reported. We present a case of a juxta-articular myxoma at the metacarpophalangeal joint of the thumb in a 40-year-old man. The preoperative diagnostic work-up included 4-dimensional magnetic resonance angiography and ultrasound. The histochemical examination of the resected tumor established the diagnosis definitively. Follow-up magnetic resonance imaging scheduled with no clinical suspicion of tumor recurrence 9 months after surgery revealed no obvious recurrence. At 14 months, the patient had full motion without pain and declined further imaging.

[A tablet-based model to simulate the interaction between extrinsic forearm and intrinsic hand muscles]. / Tablet-basiertes Trainingsmodell zum Verständnis des Zusammenwirkens von extrinsischer Unterarmmuskulatur und intrinsischer Handmuskulatur.

The interaction between different muscles needed to perform specific tasks with our hands is more complicated than one might think. We have composed a tablet-based model that is intended to motivate users to "design" specific functional grips making weighted use of the available tools, i. e. the extrinsic forearm and intrinsic hand muscles. The solutions provided for the various tasks are not exhaustive as there is no validated database for most non-standard grips. Our motivation for creating this model was to contribute to further education and to add fun to our daily work.