Ulnar neuropathy associated with subdermal contraceptive implant

Area of Science:

• Reproductive Medicine
• Neurology
• Surgical Complications

Background:

• Subdermal contraceptive implants are widely used, with common side effects including abnormal uterine bleeding and local reactions.
• Local implant site reactions, such as pain, infection, and expulsion, occur in a small percentage of users.
• Neuropathy related to implant insertion or removal is rare, with only a few documented cases involving specific nerves.

Observation:

• This case report describes the first instance of axonal motor and sensory ulnar neuropathy.
• The neuropathy was associated with the removal of a subdermal contraceptive implant (Norplant).
• Previous reports of implant-related neuropathy involved the musculocutaneous or antebrachial cutaneous nerves.

Findings:

• Subdermal contraceptive implants are associated with a range of side effects, affecting up to 80% of users.
• Local implant site reactions are infrequent but can include pain, infection, and expulsion.
• Ulnar neuropathy, affecting both motor and sensory functions, is a newly described complication linked to Norplant removal.

Implications:

• This finding expands the known spectrum of potential complications associated with subdermal contraceptive implants.
• Awareness of this rare neurological complication is crucial for clinicians managing patients with these devices.
• Further investigation into removal techniques may be warranted to minimize risks of nerve injury.