Injury to ns infrapatellar branch of the saphenouns nerve (IBSN) is Typical During total knee arthroplasty (TKA) via a typical midheat skin incision. Occasionally, painfutogether neuromas develop at the tranarea of nerve and reason pains and also limitati~ above that the array of activity that ns knee joint.

You are watching: Infrapatellar branch of the saphenous nerve

situation presentation

A 70-year-old woguy proficient best knee ache and stiffness because that 4 year after TKA. Physical evaluate revealed medial tenderness; Tinel’s authorize was positive. Radiographs revealed that ns prosthesins wtogether well-inserted and well-fixed. Sthe wtogether diagnosed via arthrofibrosis and also feasible neuroma ~ TKA. She underwent best knee exploration, neurectomy, adhesiolysis and spacer exchange. The neuroma-favor tissue was sent out because that pathological examination. Ns patience recovered uneventcompletely and at 3-month follow-uns reporting no recurrence that pains or stiffness. The pathologicatogether reharbor evidenced ns diagnosis that neuroma.


IBSN injury must be a problem if surgeons encounter a patience that has actually ache and stiffness after ~ TKA. Tinel’s sign, neighborhood anesthetic injection, MRns and ultrasound can assist ns diagnosis and also determine ns specific area that neuroma. Operation intervention must it is in perdeveloped if necessary.

Peer testimonial reportns


In the procedure that full knee arthroplasty (TKA), injury the the infrapatellar branch the ns saphenous nerve (IBSN) or itns terminal branches is common. This can leADVERTISEMENT come paresthesia or anesthesia the ns mediatogether and anterior component the ns knee <1,2,3>. Occasionally, a painfutogether neuroma creates at the tranarea of the nerve, leading to ache and limitation that the variety of movement that the knee share <2, 3>.

ns saphenouns nerve ins the longesns cutaneous branch that ns feethical nerve. It perfoprices through the adductor canal between ns tendons of the gracilis and also sartorius muscles. Ins dividens right into ns IBSN and also gives ns proximal tibia worse medial come the patella <2, 3>. Many researcher have actually defined the anatomy of ns IBSN <4,5,6,7,8>, i beg your pardon ins separated into three branches. Ns premium branch runs inferior to ns distal pole that the patella transversely. Ns Middle branch arises indigenous ns premium branch and passes diagonallied throughout ns patellar tendon. The inferior branch extends along ns mediatogether bbespeak the ns patellar tend~ above and terminatens in ~ the tibial tubercle <9,10,11>.

because of itns anatomical characteristics, ns IBSN is frequently damaged by compression, infection, trauma, or iatrogenic factors, together together needles or surgical treatment <4, 12,13,14>. Unintentionatogether IBSN injury caused by surgical treatment has actually been reporting in anterior cruciate ligament reconstruction <5, 7, 8, 15, 16>, standard anteromediatogether knee arthroplasty <5, 7, 14>, vascular surgical procedure that the reduced extremity <4>, and also TKA <2,3,4, 12>. The ubiquity the IBSN damages together a postoperative complicatitop top in part research studies ranges native 0.5 come 53% <10, 17>.

damage come the IBSN leader to sensory comorbidities in Most cases. Troubles can encompass losns the sensation, paresthesia, neuralgia or hypersensitivity in the medial infrapatellar location the ns reduced extremity <10>. Patients can also build a post-operati have neuroma native the tranarea area the ns IBSN or itns terminal branchens in rarely situations <7>. Ilfeld ens al. Reporting the as much as 9.7% of main TKA patient and also 21% the revision patient competent ache after ~ surgery, which can be meeting to neuroma formation based upon their clinicatogether data <18>. However, the authoritative incidence that knee neuroma after ~ TKA has actually no to be reported.

Aldespite IBSN injury ins common, knee stiffnesns result from neuroma in patients ~ TKA surgery, requiring revision, is rare. In thins article, we current a case of a 70-year-old woman that complained that knee ache and stiffnesns ~ TKA. Neuroma was diagnosed after ~ surgical exploration and also pathological examination. Her pain and also rigidity to be completely readdressed after ~ neurectomy, adhesiolysins and also spacer exchange.

the patience wtogether a 70-year-old femasculine via ongoing appropriate knee rigidity and also ache after best TKA. Four year earlier, sthe was diagnosed through major osteoarthritins of the best knee at one more hospital, and also TKA wtogether performed uneventfully. Sthat recovered fine in a pair the month after ~ surgery, but climate sthe started come feel sharp pains in ns medial component of the appropriate knee, and also as an outcome skilled a decrlull in ns variety the motion (ROM). In subsequent years, she right knee pains and rigidity slowly increased. Treatments consisting of non-steroidal anti-inflammation drugs, cortisone injections and physical therapy gave little or no relief. In ~ our clinic, sthe reported serious ache ~ above ns medial genicular area with any movement that ns reduced limbs and also also at rest. The visual analogue scale (VAS) score for her knee pains was 6/10. She appropriate knee movement wtogether limited come a number of degrees. Other clinical history connected hypertension, hyperlipidemia, and also diabetens mellituns because that about 10 years.

top top physics assessment, ns patient’ns BMns was 24.7 kg/m2. She walked into the ward via an antalgic and stubborn gait. Ns skin over the appropriate knee operation scratch wtogether well-heeled. Tbelow was slight atrophy of her right calf or quadriceps. Tenderness was uncovered in ~ ns medial knee compartmentns however not the lateratogether compartment. Tinel’s sign wtogether positive, whereas the varuns stress and anxiety test, valguns tension test and patellar compressitop top check to be every negative. Energetic ROM was 0° to 60° (Fig. 1a and b).


the patient then underwenns right knee exploration, adhesiolysis and also spacer exreadjust under general anesthesia. Antibiotic prophylaxis was administered for perioperati have epidemic prevention, and also ns tourniquens was collection at 250 mmHg. Ns surgical treatment wtogether performed via the previouns surgical approach, which was a 15-centimeter typical midheat skin incision. After ~ blunt separation that subcutaneous tissue, us oboffered a number of thickening neuroma-prefer tissues distributed in both remarkable and worse parts of the mediatogether genicular area (Fig. 3a and also b). Based on ns innervati~ above around ns knee, these abRegular tconcerns might have to be acquired from ns infrapatellar branch the ns saphenouns nerve or ns mediatogether feethical cutaneous nerve. Some nerve branchens were scarred and adhering to neighboring blood vessels and fat in clumps. Subcutaneouns neurectomine was percreated and ns specimen wtogether climate sent because that pathological examination. Ns share capsule was incised with ns medial parapatellar approach. Expedition proved hyperplasia of ns synovium, and also ns presence of a large amountain the fibrouns tproblem roughly the prosthesis, patella and intercondylar fossa. Ns femoral ingredient and tibial tbeam showed secure fixation. This findings corresponded to ns stiffnesns the the patient’s physics examination, and also shown ns diagnosis that arthrofibrosis. Adhesitop top lysis wtogether perdeveloped to remove ns intracapsular sauto tworry (Fig. 3c). Synovectomine was percreated to rerelocate hyperproliferati have synoviatogether tissue. The polyethylene spacer was reput through a brand-new one of an ideal size, through a thicknesns the 11 mm. The scratch was then closed, and ns patient’ns instant postoperative food was uneventful.

the patient resumed knee exercise 2 dayns after surgery and recovered uneventfully. She hADVERTISEMENT complete reSystems that best knee ache withthe end pains medicine (Vtogether 2/10 ~ above second postoperative day, Vtogether 0/10 at 2 weeks postoperatively). The ROM of ns appropriate knee was 0° to 110° on the second postoperative day (Fig. 1c and d) and also boosted come 0° come 120° at 2 weeks postoperatively. Ns post-review radiograph revealed comparable permanent and also placement together pre-review (Fig. 2b). The pathological report confirmed the ns speciguys consisted of fat, blood vessels, collagen and also nerve tissue, and the arrangement that nerve fiber bundles to be haphazard, i beg your pardon was considered to be a traumatic neuroma (Fig. 4).

Neuroma that ns IBSN after ~ TKA ins no a extensively well-known operation complication. Yet it has actually been reporting ~ anterior cruciate ligamenns reconstruction, arthroscopy, tibial nailing, and also TKA <8, 19> and ins a reason that chronic pain, even stiffness. There have been numerous reports in ns orthopedic literary works <12, 18, 20>, yet just among them wtogether pathologicallied evidenced <2>.

us existing ns situation that a 70-year-old female that competent knee pains and also stiffnesns ~ TKA. The pain was medial, Tinel’s sign wtogether Positive and she reporting the Vtogether score together 6/10. Ns patient’s reEquipment that knee pains and recoexceptionally that ROM after ~ neurectomine sustained our theory about the existence of a neuroma, which wtogether confirmed by Additional pathologicatogether examination. Ns pains indigenous a neuroma might reason a palliation that joint motion, which climate leads to arthrofibrosis and also rigidity of ns joint. Come ns ideal that our knowledge, ns present report is the Second case to define a painful IBSN neuroma led to by TKA and confirmed by pathology. Kachar ens al. Reported ns case the a 68-year-old female with knee pain and stiffnesns brought about by neuroma after TKA surgical treatment in 2008. Her symptoms to be entirely relieved after ~ superficial exploration and resection of the neuroma in ~ 21 month post-operation, yet arthrofibrosins was not uncovered and she did no underwalk revision <2>. Ns situation reported through Kachar et al. Underwent surgery considerably earlier than ours case. Our patience did not obtain fast treatment because that her postoperative pain, i beg your pardon resulted in long-term activity limitatitop top and also arthrofibrosis, Thus review treatment wtogether inevitable. Thins says the at an early stage diagnosis and also management ins crucial for patient through postoperative pains ~ TKA.

Usually, the progress that neuromatouns ache is no fast. However, Nagans ens al. Reporting the situation the a 74-year-old female who complained that pain just 1 mainly ~ TKA, and a Confident Tinel’ns authorize wtogether eliquote in ns IBSN region. Sthat underwenns partiatogether denervation that the IBSN 3 month ~ TKA, and also ache was considerably relieved. Pathological examicountry revealed the as a result of ns Short duration that the condition onset, the patience hAD not developed a true neuroma <21>.

Ins ins tough come proccasion injury come ns IBSN adhering to TKA. Ideally, ns operation scratch of TKA should be parallel come ns IBSN once technicallied possible. Yet a examine performed by Kerver et al. Discovered that ns area of ns IBSN ins extremely variable, and a safe zone ins Because of this hard come define prior to incision <22>. A current cadaveric examine through Lee ens al. Declared the tbelow wtogether no continual method come preserve the IBSN making use of a traditional midline method in TKA and also patience education and learning ~ above thins complicatitop top is Because of this crucial <23>.

Tbelow are a number of approaches that may be useful in diagnosong neuromas, together together neighborhood anesthetic injectitop top and also MRI. Ns ache and stiffness would certainly be relieved if the symptom to be induced by neuroma <2, 3>. Neuroma nodulens have the right to likewise be uncovered top top MRi in specific cases. Currently, the exact place of ns IBSN neuromtogether and also optimatogether therapy targain area have the right to be figured out through Tinel’ns test. Some techniques together together use the a ultrasound-guided needle <24> or a peripheral nerve stimulator <25> are also advantageous for targeting. With the advance of ultrasound technology, high-reEquipment ultrasound has actually to be supplied come that s right meacertain cutaneous nerves. Researchers have been able come discover enlargemenns by measurinns ns nerve cross-sectionatogether location of specific cutaneous nerves, such as ns suprascapular nerve. Therefore, ins have to likewise it is in feasible to usage high-reSolution ultrasound to measure ns cross-sectional location of ns IBSN prior to surgery. A very early diagnosins and specific area that IBSN neuroma could As such it is in accomplished <26, 27>.

Conservative administration the neuromas consists of local injection the analgesics, corticosteroidns and physics therapy. Surgical treatment is forced if conservati have treatment falls short <12>. Surgery has IBSN neurolysis, cryoneurolysis <28>, neurectomy and selecti have knee denervation. Worth ens al. Prove the neurectomine provided better ache relief 보다 neurolysis in patient with saphenouns nerve entrapment <29>. Dellttop top ens al. Explained selective knee denervatitop top together an efficient treatment because that neuroma pain <30>. Saphenouns or IBSN neurectomy or denervation might it is in percreated ~ diagnosins and targeting. To proccasion ns recurrence of IBSN neuroma, nerve end cauterizing utilizing one electrocautery can be perdeveloped <2>.

concerning the prognosins of patients via neuroma ~ TKA, early diagnosins and therapy to be that good significance. In this case, the patient’ns knee pain wtogether no diagnosed and cure in the at an early stage stPeriod ~ TKA, resulting in slowly increasing stiffness and also arthrofibrosis. In ns finish stage, subcutaneous neurectomy ala was not sufficient to relax symptoms, and review wtogether perdeveloped come rerelocate ns proliferating fibrous tworry and also exadjust the spacer. We recommfinish the if surgeons encounter patient with apparent knee pain after ~ TKA surgery, neuroma need to it is in considered together one feasible cause as beforehand as possible. Tinel’ns test and ROM readjust ~ local anesthetic injectitop top can help in distinguishing IBSN injury native intra-articular problems. Operation intervention have to be taken into consideration if conservative treatment is not effective.

See more: Read Online The Psychologist As Detective 6Th Edition Pdf, The Psychologist As Detective Pdf

In conclusion, us recommended that surgeons have to it is in concerned about IBSN injury if they encounter a patience who has actually pains and stiffness ~ TKA. Tinel’s test, neighborhood anesthetic injection, MRns and also high-reSystems ultrasound could aid come identify the etiology of ache and also stiffness. Surgical intervention should be percreated if necessary.