Fatty liver

Disease Description (Causes and Symptoms)

• Definition: Interdigital neuroma (Morton's neuroma) is a condition in which the interdigital nerve leading to the toes undergoes fibrosis and thickening due to chronic compression and irritation between the metatarsal heads (mainly between the 2nd–3rd or 3rd–4th metatarsophalangeal spaces); it is not a true tumor.
• Causes/pathophysiology: Repeated compression and shear forces cause fibrosis around the interdigital nerve, while thickening of the transverse intermetatarsal ligament or surrounding structures (ganglion, bursa, lipoma, etc.) can cause compression. Narrow toe boxes and high-heeled shoes are commonly associated risk factors.
• Main symptoms: Burning pain centered in the forefoot, tingling sensations, numbness, or loss of sensation. Symptoms usually worsen when walking or wearing narrow, high-heeled shoes and tend to improve when the shoes are removed or the foot is massaged. Pain and a click (Mulder's click) may be elicited during web-space compression testing (web-space squeeze test).

Treatment Methods and Precautions

• First-line (conservative) treatment — standard initial approach
  • Shoe modification: Shoes with a wide toe box and low heels are recommended (shoes with sufficient room in the toe area), with rounded soles and shock-absorbing insoles.
  • Orthotic devices: A metatarsal pad or functional insole can increase the space between the metatarsals and reduce nerve compression.
  • Activity modification and weight management: Reduce prolonged standing and activities that place substantial stress on the forefoot.
  • Medication: Temporary use of NSAIDs or oral analgesics for pain control (they may provide some benefit because the inflammatory mechanism is substantial).
• Injection treatment (for both diagnosis and treatment)
  • Intralesional injection of a local anesthetic alone or a steroid plus anesthetic: If the pain disappears immediately for diagnostic purposes, the nerve lesion is more certain. Steroids are effective for short-term symptom improvement, but recurrence is possible.
  • Nonsurgical alternatives: Alcohol nerve injection (non-growth destruction of the neuroma), radiofrequency or cryoablation, etc. (differences exist by case and center).
• Surgical treatment (considered when conservative/injection treatment fails)
  • Neurectomy: Excision of the affected nerve. Advantage: definitive removal of the lesion. Disadvantages: reduced sensation in the affected toe (which may be permanent), scar pain, and possible recurrence (or stump neuroma).
  • Decompression (division of the transverse intermetatarsal ligament): Intended to relieve nerve compression. Sensation may be preserved, but complete resolution of symptoms cannot be guaranteed.
  • Surgical outcomes: Although they vary among studies, some reports show satisfaction rates of approximately 64%, among other results; recurrence and plantar foot pain may persist in the long term, so surgery should be considered carefully.
• Complications and precautions
  • After surgery: Partial or complete loss of sensation, painful scarring, infection, hematoma, and possible recurrence (stump neuroma).
  • In cases of systemic disease (such as diabetes), consider reduced sensation and delayed wound healing. If taking anticoagulants, consult a doctor before the procedure or surgery.
  • Do not self-inject or undergo procedures performed by nonprofessionals.

Outpatient Visit Checklist (Including Preparation Items and Sample Questions)

• Preparation items (recommended to bring)
  • A list of currently used medications and supplements (including anticoagulants and antiplatelet agents).
  • Medical history: Diabetes, rheumatoid arthritis, and records of previous foot surgery or trauma.
  • Symptom records: Onset, situations that worsen symptoms (shoes, activities), pain intensity (numeric/visual analog scale), and the area of tingling or numbness.
  • Previous test and imaging results (if available, X-ray, ultrasound, MRI, and electromyography results) and treatment records (insoles, injections, physical therapy).
  • Comfortable clothing or shorts (for examination of the foot)
• Photos/videos to show the doctor during the outpatient visit (optional)
  • Photos of the shoes and foot shape when symptoms occur, and videos showing activities that trigger pain (if available).
• Sample questions to ask the doctor during the consultation (simple format)
  • "What tests are needed to determine for certain whether my symptoms are due to an interdigital neuroma?"
  • "How long should conservative treatment be tried before considering surgery?"

General Sample Questions to Ask the Doctor

• What are the immediate and long-term side effects of this medication (or injection)?
• What is a realistic expectation for managing symptoms without injections or surgery? (Possibility of relief, recurrence rate)
• If I undergo surgery, what is the recovery period and when can I return to daily activities?
• How will my underlying conditions (for example, diabetes or anticoagulant use) affect treatment choices?

Disease-Specific Sample Questions

• "Can an interdigital neuroma be definitively diagnosed with a web-space compression test (web-space test) or a diagnostic local anesthetic injection? What response should I expect during the test?"
• "If I undergo surgery (excision), will the loss of sensation in the affected toe be permanent? How much functional inconvenience from the sensory loss should I expect?"

(Note: The above summarizes clinical evidence and general recommendations. Diagnosis and treatment plans may vary depending on the individual’s condition. Consult the treating doctor regarding specific prescriptions and whether to undergo a procedure.)