OBJECTIVE: To analyze the incidence and characteristics of fabella in the Chinese population and its correlation with pain in the posterolateral region of the knee joint and common peroneal nerve palsy. METHODS: Total 732 patients including 405 males(450 knees) and 327 females(383 knees) who underwent unilateral or bilateral knee MR imaging from September 2015 to July 2019 were retrospectively evaluated. The basic information of all patients was extracted from the hospital's his system. The patient's medical records were checked by telephone follow-up or his system, and the number of patients with posterolateral knee pain and common peroneal nerve paralysis were recorded. RESULTS: The overall prevalence of fabella was 48.38%, 23.53% in men and 24.85% in women, there was no significant difference between them ( CONCLUSION The prevalence of fabella us in Chinese population is 48.38%. There is no relationship between the incidence of gastrocnemius and gender, but the incidence of fabella is positively correlated with age, pain in the posterolateral region of the knee joint and the occurrence of common peroneal nerve symptoms.
Adult ; Female ; Humans ; Knee Joint ; Male ; Middle Aged ; Pain ; Peroneal Nerve ; Peroneal Neuropathies/epidemiology* ; Retrospective Studies ; Young Adult

No abstract available.
Cyclosporine ; Peroneal Neuropathies

OBJECTIVE: In Asians, kneeling and squatting are the postures that are most often induce common peroneal neuropathy. However, we could not identify a compatible compression site of the common peroneal nerve (CPN) during hyper-flexion of knees. To evaluate the course of the CPN at the popliteal area related with compressive neuropathy using magnetic resonance imaging (MRI) scans of healthy Koreans.METHODS: 1.5-Tesla knee MRI scans were obtained from enrolled patients and were retrospectively reviewed. The normal populations were divided into two groups according to the anatomical course of the CPN. Type I included subjects with the CPN situated superficial to the lateral gastocnemius muscle (LGCM). Type II included subjects with the CPN between the short head of biceps femoris muscle (SHBFM) and the LGCM. We calculated the thickness of the SHBFM and posterior elongation of this muscle, and the LGCM at the level of femoral condyles. In type II, the length of popliteal tunnel where the CPN passes was measured.RESULTS: The 93 normal subjects were included in this study. The CPN passed through the “popliteal tunnel” formed between the SHBFM and the LGCM in 36 subjects (38.7% type II). The thicknesses of SHBFM and posterior portions of this muscle were statistically significantly increased in type II subjects. The LGCM thickness was comparable in both groups. In 78.8% of the “popliteal tunnel”, a length of 21 mm to < 40 mm was measured.CONCLUSION: In Korean population, the course of the CPN through the “popliteal tunnel” was about 40%, which is higher than the Western results. This anatomical characteristic may be helpful for understanding the mechanism of the CPNe by posture.
Asian Continental Ancestry Group ; Head ; Humans ; Knee ; Magnetic Resonance Imaging ; Nerve Compression Syndromes ; Peroneal Nerve ; Peroneal Neuropathies ; Posture ; Retrospective Studies

Peroneal neuropathy is a common mononeuropathy of the lower limb. Some studies have reported cases of peroneal neuropathy after vascular surgery or intervention. However, no cases of peroneal neuropathy with occlusion of a single peripheral artery have been previously reported. A 73-year-old man was referred with a 3-week history of left-sided foot drop. He had a history of valvular heart disease and arrhythmia, and had previously been treated with percutaneous coronary intervention. Computed tomography angiogram of the lower extremity showed proximal occlusion of the left anterior tibial artery. An electrodiagnostic study confirmed left common peroneal neuropathy. After diagnosis, anticoagulation therapy was started and he received physical therapy.
Aged ; Arrhythmias, Cardiac ; Arteries ; Diagnosis ; Foot ; Heart Valve Diseases ; Humans ; Ischemia ; Lower Extremity ; Mononeuropathies ; Percutaneous Coronary Intervention ; Peroneal Neuropathies* ; Tibial Arteries*

OBJECTIVE: To establish the diagnostic cutoff value of ultrasonographic measurement for common fibular neuropathy (CFN) at the fibular head (FH). METHODS: Twenty patients with electrodiagnostically diagnosed CFN at the FH and 30 healthy controls were included in the study. The cross-sectional area (CSA) of sciatic nerve at mid-thigh level, common fibular nerve at popliteal fossa (PF), and common fibular (CF) nerve at FH were measured. Additionally, the difference of CF nerve CSA at the FH between symptomatic side and asymptomatic side (ΔSx–Asx), the ratio of CF nerve CSA at FH to at PF (FH/PF), and the ratio of CF nerve CSA at the FH symptomatic side to asymptomatic side (Ratio Sx–Asx) were calculated. RESULTS: CSA at the FH, FH/PF, ΔSx–Asx, and Ratio Sx–Asx showed significant differences between the patient and control groups. The cutoff value for diagnosing CFN at the FH was 11.7 mm² for the CSA at the FH (sensitivity 85.0%, specificity 90.0%), 1.70 mm² for the ΔSx–Asx (sensitivity 83.3%, specificity 97.0%), 1.11 for the FH/PF (sensitivity 47.1%, specificity 93.3%), and 1.24 for the Ratio Sx–Asx (sensitivity 72.2%, specificity 96.7%). CONCLUSION: The ultrasonographic measurement and cutoff value could be a valuable reference in diagnosing CFN at the FH and improving diagnostic reliability and efficacy.
Head* ; Humans ; Peroneal Nerve ; Peroneal Neuropathies* ; Sciatic Nerve ; Sensitivity and Specificity ; Ultrasonography*

Common peroneal neuropathy during normal delivery is associated with instrumentation and prolonged time spent in a certain position. We report a case of unilateral common peroneal neuropathy in a vaginal delivery patient under labor analgesia with the combined spinal-epidural technique. A 29-year-old woman complained of weakness and numbness of the left foot two days after vaginal delivery. Neurologic examination and electrodiagnostic testing confirmed left common peroneal neuropathy. The patient was referred for rehabilitation, which substantially improved her mobility and function, and prevented secondary damage. The patient had not fully recovered at three months after the delivery. The possible etiology of the postpartum common peroneal neuropathy was most likely prolonged and excessive pressure around the knee by assistants. Excessive compression during delivery should be minimized or avoided. Patient education and awareness among the labor and delivery team will prevent this complication. Neurologic complications related to epidural analgesia should also be ruled out in these patients.
Adult ; Analgesia* ; Analgesia, Epidural ; Female ; Foot ; Humans ; Hypesthesia ; Knee ; Labor, Obstetric ; Neurologic Examination ; Patient Education as Topic ; Peroneal Neuropathies ; Postpartum Period ; Pregnancy ; Rehabilitation

INTRODUCTIONThere have been intermittent reports of peroneal neuropathy (PN) occurring after liver transplantation. Although PN may not be viewed as a serious complication by liver transplant (LT) recipients who require the transplant for survival, PN can significantly reduce quality of life. The incidence of PN appears to have increased after the use of gel pads was introduced. These gel pads, which are placed under patients' knees during surgery, are used to reduce lower back strain and prevent contact between the peroneal nerve at the fibular head and the hard surface of the operating table. The aim of the present study was to investigate the association, if any, between the use of gel pads and the incidence of PN.

METHODSThe medical records of 261 adult LT recipients were retrospectively reviewed. The recipients were divided into gel pad (n = 167) and non-gel pad (n = 94) groups. The incidence and possible risk factors of PN were compared between the two groups.

RESULTSThe overall incidence of PN was 8.0% (21/261). The occurrence of PN was significantly higher in the gel pad group than in the non-gel pad group (10.8% vs. 3.2%; p < 0.05). Other possible risk factors were comparable between the two patient groups.

CONCLUSIONAs the use of gel pads may increase the incidence of PN, we recommend against the use of gel pads under the knees of LT recipients.

Adult ; Female ; Gels ; Humans ; Incidence ; Liver Failure ; complications ; surgery ; Liver Transplantation ; adverse effects ; Low Back Pain ; prevention & control ; Male ; Middle Aged ; Peroneal Neuropathies ; etiology ; prevention & control ; Postoperative Complications ; prevention & control ; Protective Devices ; Quality of Life ; Retrospective Studies ; Risk Factors ; Treatment Outcome

Foot drop is usually derived from peroneal nerve injury. Traumatic causes of peroneal nerve injury are more common than insidious causes including metabolic syndromes and mass lesions. We present a case with common peroneal neuropathy due to schwannoma, which is extremely rare. Complete excision of the mass lead to a gradual improvement of the symptoms. Schwannoma should be considered as a cause of common peroneal neuropathy.
Foot* ; Neurilemmoma* ; Paralysis ; Peroneal Nerve* ; Peroneal Neuropathies

Intermittent pneumatic compression device is a standard component for prevention of deep venous thrombosis in immobile patients. This method has been known to be safe with very low rate of complications compared to medical thromboprophylaxis. Therefore, this modality has been used widely in patients who underwent a general surgery. We report a patient who developed common peroneal nerve palsy during the use of intermittent pneumatic compression device after Hartmann's operation.
Humans ; Intermittent Pneumatic Compression Devices ; Paralysis ; Peroneal Nerve ; Peroneal Neuropathies ; Postoperative Complications ; Venous Thrombosis

OBJECTIVE: To investigate the characteristics of forensic clinical identification on common peroneal nerve injury in traffic accident. METHODS: Eight cases of common peroneal nerve injury in traffic accidents were analyzed, including general condition of the wounded, the way of injury, the imaging results, the EMG results, and the degree of injury, etc. RESULTS: In 8 cases, 2 cases of complete common peroneal nerve injury were determined to grade 9 (disability degree) and 6 cases of partial common peroneal nerve injury were determined to grade 10 (disability degree). CONCLUSION By comparison, the disability degree of complete common peroneal nerve injury is higher than that of partial common peroneal nerve injury. The forensic clinical identification of common peroneal nerve should be made with synthetical consideration of medical history, symptoms, and auxiliary examinations.
Accidents, Traffic ; Adult ; Age Distribution ; Disability Evaluation ; Expert Testimony ; Female ; Fibula/injuries* ; Fractures, Bone/physiopathology* ; Humans ; Leg Injuries/physiopathology* ; Male ; Middle Aged ; Peroneal Nerve/physiopathology* ; Peroneal Neuropathies/physiopathology* ; Radiography ; Trauma Severity Indices