Even if a tendon sheath cyst is left untreated, it has no significant effect on the functioning of the organism. Tendon sheath cysts are benign tumors and do not have the potential for malignancy, so even if left untreated and not surgically removed, tendon sheath cysts do not lead to serious complications or excessive loss of function in the organism. Even if a tendon sheath cyst grows very large and affects localized movement, the degree of impact on movement is very small. Tendon sheath cysts are mostly asymptomatic and do not lead to clinical symptoms such as swelling and pain, so even if the tendon sheath cysts are left untreated, the effect on the organism is not significant.