546 Diseases of Synovial Sheaths. 



9. 9. " Melon Seed " Bodies from Tubercular Affection of 

 Synovial Sheath, "Compound Gang-lion."— Numerous 



" melon-seed " bodies — in spirit. 



From a ganglion over the tendon of the extensor communis digitorum 

 muscle. 



These bodies, often found in enlarged and thickened 

 synovial sheaths, have been proved to be associated with the 

 tubercle bacillus. B. C. ii. M. 36. 



9. 10. "Melon Seed" Bodies from Tubercular Affection of 

 Synovial Sheath, "Compound Gang-lion." — Numerous 



melon-seed bodies — in spirit. 



"These were evacuated by incision from the sheath of the flexor 

 tendons of the middle finger. The patient, a man over 50 years of age, had 

 suffered from this enlargement for six or seven years. Incision was made 

 nearly over the heads of the metacarpal bones. The patient, at first, was 

 greatly relieved." 



Besides well-formed loose bodies, others were found smaller, 

 and in process of formation, showing the gradual development 

 as enlargements from the inner surface of the synovial sheath, 

 often in the form of fringes. G. C. 852. 



Presented by John Gairdner, F.R.C.S.E., 1826. 



9. 11. Larg-e Gang-lion near the Wrist. — Plaster of Paris cast 



of the back of a left hand and wrist, showing an enlargement 

 near the lower end of the ulna. 



The cast was originally entered as one of a diseased bursa, 

 but from its lobulated character and position over the region of 

 the synovial sheaths at the lower end of the ulna, it has 

 no doubt been a ganglion, possibly associated with arthritis 

 deformans. F. P. C. 2933. 



9. 12. Very Larg-e Gang-lion near the Wrist.— Plaster of Paris 



cast of the back of a right hand and wrist, illustrating the 

 above. 



