Long-Term Clinical and Radiographic Follow-Up of Preaxial Polydactyly Reconstruction

Revision of residual deformities after primary surgery for Wassel-Flatt IV-D thumb duplication using a microsurgical free lateral great toe flap

We report the application and results of skin defect coverage using the free lateral great toe flap in revision surgery for residual postoperative deformities in Wassel-Flatt type IV-D thumb duplications. This retrospective study included five patients treated between June 2020 and September 2021 to correct angular deformity and repair the secondary skin defect. All the flaps survived. The patients were followed up for 8-12 months and all the reconstructed thumbs had a satisfactory appearance. The results of the Japanese Society for Surgery of the Hand scoring system were excellent in one patient, good in three patients and fair in one patient. The results of the Alignment, Ulnar and Radial stability, Range of motion and Aesthetical aspects (ALURRA) scoring system were good in four patients and moderate in one patient.Level of evidence: IV.

Complications after radial polydactyly surgery: analysis, prevention and management

Long-term follow-up after surgical correction of patients with radial polydactyly might reveal unexpected or undesired outcomes that are accentuated by growth. It should be stressed that assessment of outcomes differs considerably by the system used. Preoperative examination can elucidate the underlying pathological anatomy of these anomalies and consequently, these anatomical differences should be corrected as much as possible during the first operation to prevent worse outcomes at long-term follow-up. In various long-term studies, the reoperation rate was in the range of 7%-28%, with the most common reasons being deviation, instability, nail deformity and suboptimal appearance. Most unfavourable results occur during growth and are frequently revealed only at longer-term follow-up. Concentration of care to a few centres is advised since these malformations occur in small numbers and experienced surgeons tend to have better results. Consensus on the used assessment system and multicentred studies are essential in future to better understand how we can prevent reoperations.

Modified Wassel-Flatt Type III Radial Polydactyly: Subtypes and Their Outcomes

PURPOSE

We aimed to subdivide modified type III radial polydactyly and evaluate the applied surgical procedures and outcomes according to the subtypes.

METHODS

This study included 32 thumbs of 32 patients treated for modified Wassel-Flatt type III radial polydactyly from March 2008 to December 2018. Each patient was subclassified into parallel, divergent, and convergent types according to the alignment of the duplicated digit. The parallel type was further divided according to the treatment method applied. The parallel A group comprised patients treated with reconstructing the radial collateral ligament of the interphalangeal (IP) joint after removing only the distal phalanx and preserving the proximal phalanx of the extra digit, and the parallel B group comprised patients treated with excision of the extra digit at the bifurcation site of the proximal phalanx. We evaluated the Japanese Society for Surgery of the Hand scores and radiographic angulation of the IP and metacarpophalangeal joints at a mean follow-up of 38 months.

RESULTS

Fourteen cases were parallel type (6 and 8 in the parallel A and B groups, respectively), 14 were divergent type, and 4 were convergent type. Patients in the parallel A group had significantly better IP and metacarpophalangeal joint angulation and Japanese Society for Surgery of the Hand scores than those in the parallel B group. Patients in the parallel A group had significantly better Japanese Society for Surgery of the Hand scores than those in the divergent and convergent groups.

CONCLUSIONS

Reconstructing the radial collateral ligament of the IP joint after removing only the distal phalanx and preserving the proximal phalanx of the extra digit was associated with better outcomes than the excision of the extra digit at the bifurcation site in the parallel type cases. The parallel type treated with proximal phalanx preservation and ligament reconstruction had better clinical outcomes than other types of modified Wassel-Flatt type III radial polydactyly.

TYPE OF STUDY/LEVEL OF EVIDENCE

Prognostic IV.

Common Pediatric Hand Anomalies

Upper extremity congenital anomalies in the newborn are second only to congenital heart anomalies. Some of the more commonly encountered upper extremity anomalies are trigger thumb, thumb hypoplasia, polydactyly, syndactyly, and amniotic band syndrome. While some conditions occur in isolation, others are known to commonly occur in association with syndromes. Familiarity with these conditions is important not only to provide adequate evaluation and workup of these patients but also to deliver appropriate surgical intervention and prepare parents with appropriate expectations. In this article, we outline the etiology, classification, surgical management, and outcomes of these five commonly encountered upper extremity congenital anomalies.

Congenital Upper-Limb Differences: A 6-Year Literature Review

➤ The Oberg-Manske-Tonkin (OMT) classification of congenital hand and upper-limb anomalies continues to be refined as our understanding of the genetic and embryonic etiology of limb anomalies improves.➤ We have conducted an evaluation of graft and graftless techniques for syndactyly reconstruction; strengths and drawbacks exist for each technique.➤ Treatment for radial longitudinal deficiency remains controversial; however, radialization has shown promise in early follow-up for severe deformities.➤ Recent emphasis on psychosocial aspects of care has demonstrated that children with congenital upper-limb differences demonstrate good peer relationships and marked adaptability.

The Responsiveness of the Patient-Reported Outcomes Measurement Information System Upper Extremity and Physical Function in Patients With Cubital Tunnel Syndrome

PURPOSE

The Patient-Reported Outcomes Measurement Information System (PROMIS) Upper Extremity (UE) and PROMIS Physical Function (PF) are increasingly referenced patient-reported outcomes. To interpret treatment effects with these patient-reported outcomes, investigators must understand magnitudes of change that represent clinically relevant improvement. This study assessed the responsiveness of PROMIS UE and PF in patients with cubital tunnel syndrome.

METHODS

A retrospective analysis of PROMIS UE and PROMIS PF computer adaptive test scores was performed for patients treated nonoperatively for cubital tunnel syndrome over 3 years at a tertiary institution. The Patient-Reported Outcomes Measurement Information System UE and PROMIS PF outcome scores were collected at initial and return clinic visits. At follow-up appointments, patients completed clinical anchor questions evaluating their degree of interval clinical improvement. Anchor questions allowed categorization of patients into groups that had experienced "no change," "minimal change," and "much change." Minimal clinically important difference (MCID) values were calculated for the PROMIS assessments with anchor-based and distribution-based methods.

RESULTS

A total of 304 patients with PROMIS PF scores and 111 with PROMIS UE scores were analyzed. The MCID for the PROMIS UE was 3.1 (95% confidence interval, 1.4-4.8) using the anchor-based method and 3.7 (95% confidence interval, 2.9-4.4) using the distribution-based method. These point estimates exceeded the minimal detectable change of 2.3. The MCID for the PROMIS PF was unable to be determined in this patient sample because patients reporting mild change did not have score changes exceeding measurement error.

CONCLUSIONS

The PROMIS UE v2.0 computer adaptive test detected minimal change in patients managed nonoperatively for cubital tunnel syndrome with an estimated MCID range of 3.1-3.7. While PROMIS PF has demonstrated acceptable performance in patients with a variety of upper extremity conditions, for cubital tunnel syndrome, it was less able to detect subtle change. PROMIS UE appears more responsive to subtle changes in cubital tunnel syndrome symptoms.

CLINICAL RELEVANCE

Patient-reported outcomes may have varied responsiveness depending on the condition studied.

Mid-term to Long-term Follow-up Results of Reconstruction for Thumb Radial Polydactyly

BACKGROUND

Preaxial or radial polydactyly is one of the most common hand congenital anomalies in newborns. Contemporary reconstruction methods include ligament reconstruction, excision of the polydactylous thumb, osteotomy, and other surgical techniques according to the type of polydactyly. The purpose of this study was to report mid-term to long-term reconstruction results for thumb (radial) polydactyly.

METHODS

We retrospectively reviewed the medical records of patients who underwent reconstruction surgery for preaxial polydactyly. Clinical outcomes, including the range of motion (ROM), pain, and complications, were evaluated. We assessed the final radiographs of the reconstructed thumb to identify the potential development of arthritis or other remaining deformities. After excluding cases without a simple radiograph and cases with a short follow-up period of fewer than 5 years, 26 thumbs were included. The surgical technique followed including excision of polydactylout thumb was tailored to the type of polydactyly. If the nail size of the thumbs was similar, the Bilhaut-Cloquet method was preferred.

RESULTS

The mean age of the patients at the surgery and final follow-up was 14.9 months (range: 8 to 30 mo) and 11.9 years (range: 5.8 to 19.3 y), respectively. The mean follow-up was 128.8 months years (range: 60 to 219 mo), and the mean ROM of the thumb was 32.7 and 57.5 degrees in the distal interphalangeal joint (DIP) and metacarpophalangeal (MP) joint, respectively. Ulnar or radial side instability was prominent in 7 patients in the involved joints (26.9%). One patient underwent interphalangeal (IP) fusion for extension lag with pain. The radiologic evaluation revealed that 2 patients developed radiographic evidence of IP joint arthritis (7.7%). Radial deviation of the MP or IP joint existed in 13 cases (range: 5 to 40 degrees) (50.0%), and ulnar deviation of the MP or IP joint existed in 2 cases (range: 19 to 20 degrees) (7.7%).

CONCLUSIONS

In mid-term to long-term experience, sequelae such as joint instability, joint stiffness, and remaining deformity cannot be neglected. An unstable MP joint may result if the DIP joint remains stiff or has a lower ROM.

LEVEL OF EVIDENCE

Level IV-therapeutic studies.

Long-Term Outcomes After Treatment for Type B Ulnar Polydactyly

BACKGROUND

Type B ulnar polydactyly is a common congenital hand difference and can be treated with either ligation or surgical excision. There is a paucity of literature, however, evaluating long-term patient reported outcomes of these treatments. The purpose of this study was to compare the long-term outcomes after ligation and excision for the management of type B ulnar polydactyly.

METHODS

We created a database of patients who underwent treatment for type B ulnar polydactyly at a single pediatric health system from 2005 to 2014. We administered the Patient Reported Outcomes Measurement Information System (PROMIS) Pediatric Upper Extremity survey to patients through telephone and assessed for their satisfaction.

RESULTS

We successfully collected outcomes from 69 of 173 eligible patients treated in infancy (40% response rate). The mean follow-up was 11.1±2.5 years, and the average age of the participant at the time of the survey was 11.7±2.6 years of age. Twenty-four patients were treated with in-office ligation and 45 underwent formal surgical excision. Ten patients who were initially treated with ligation required future treatment with surgery because of symptomatic neuroma stump or persistent polydactyly (42%). Patients who were treated with surgical excision rated significantly higher satisfaction with their treatment than those who underwent ligation (P=0.003). Patients in both cohorts rated similar satisfaction with the esthetic appearance of their hand (P=0.07). There was no significant difference in PROMIS-rated hand function between the ligation and surgical cohort (P=0.765) and treated adolescents PROMIS scores were not statistically different than age-matched controls without polydactyly.

CONCLUSION

While ligation and surgical excision result in similar function and esthetics, patient satisfaction is higher after surgery. Furthermore, a significant number of patients fail ligation and ultimately undergo surgery for symptomatic neuroma or persistent polydactyly. Counseling parents of patients with type B ulnar polydactyly should include these considerations to assist them in selecting the best treatment for their child.

LEVEL OF EVIDENCE

Level III.

Reoperation after primary operation for pre-axial polydactyly of the hand: A 12-year experience at a single institute

BACKGROUND

This study aimed to evaluate and describe the rate, reasons, and detailed procedures of reoperations for pre-axial polydactyly of the hand at our institute conducted within 12 years.

METHODS

We retrospectively reviewed the medical records and radiographs of 268 patients (292 digits) with pre-axial polydactyly of the hand, who were treated surgically at our institute from November 2006 to May 2018 and followed up for >12 months.

RESULTS

Fifty-two thumbs of 47 patients underwent reoperations, yielding a 17.8% reoperation rate. According to the initial deformity type, the highest reoperation rate was observed in the cases classified under modified Wassel type VIIA (60.9%, 14/23 thumbs), followed by those under type VIIB (44.4%, 8/18 thumbs). Scheduled reoperations were performed in seven type VIIA and four type VIIB cases with a triphalangeal thumb and eight with triangular epiphysis of the distal phalanx. Unexpected reoperations were conducted in 33 cases, 31 (93.9%) of which had deviated thumbs. Various surgical treatments, including corrective osteotomy, collateral ligament plication, and flexor pollicis longus tendon relocation, were performed to correct deviations. A total of 23 cases (74.2% of 31 thumbs) received a corrective osteotomy at the second or third operation.

CONCLUSIONS

The reoperation rate after primary operation for pre-axial polydactyly of the hand was 17.8%. It was higher in the cases initially classified under modified Wassel type VII; however, a considerable number of cases received scheduled reoperations. A deviated thumb was the most common cause of unexpected reoperation, and corrective osteotomy was the most commonly performed procedure. The rate and details of reoperation should be routinely mentioned for preoperative planning and patient education in pre-axial polydactyly.

LEVEL OF EVIDENCE

Therapeutic level IV.

Surgical Results of Ulnar Component Excision and Radial Component Reconstruction in Patients With Preaxial Polydactyly of the Hand

PURPOSE

Resection of the underdeveloped digit and reconstruction of the robust digit is the standard treatment option for preaxial polydactyly of the hand. As an underdeveloped digit, the radial component is usually excised, whereas the ulnar component excision is rarely needed. This study aimed to evaluate the surgical results of ulnar component excision and radial component reconstruction in patients with preaxial polydactyly of the hand.

METHODS

We retrospectively reviewed the medical records and radiographs of 809 patients (861 thumbs) who underwent surgery for preaxial polydactyly of the hand from November 2006 to June 2018. Among these, 22 (2.6%) thumbs in which the ulnar component was more hypoplastic or had more severe deformities than the radial component were treated with ulnar component excision and radial component reconstruction. The mean follow-up duration was 49 months (range, 12-142 months). We evaluated the Japanese Society for Surgery of the Hand scores and whether the patients were satisfied with the thumb function and appearance at the final follow-up. We also recorded any complications, such as reoperation.

RESULTS

The mean Japanese Society for Surgery of the Hand score was 12.8 (range, 5-17). Six patients had poor results, 7 had fair results, and 2 had good results; however, none of the patients had an excellent result. Satisfaction with thumb function and appearance was reported in 11 (50%) and 6 (27%) cases, respectively. Thirteen of 22 (59.1%) cases involved reoperations, and the most common reason for reoperation was interphalangeal joint deviation of the remaining thumb.

CONCLUSIONS

Ulnar component excision and radial component reconstruction are rare operative choices in preaxial polydactyly of the hand. Surgeons and patients should be aware that a considerable number of patients treated with this method required reoperations and had low clinical outcome scores.

TYPE OF STUDY/ LEVEL OF EVIDENCE

Prognostic IV.

What's New in Congenital Hand Surgery

BACKGROUND

Congenital conditions of the hand and upper extremity are a frequent source of consultation among pediatric orthopaedists and hand surgeons. Advances in the fields of molecular biology and genetics have helped to better understand some of these conditions and redefine previous classification systems. New outcome measurement tools have been used to assess surgical results and have brought into focus a different aspect of the patients' experience.

METHODS

We searched PubMed database for papers related to the treatment of congenital hand anomalies published from January 1, 2015 to October 31, 2018. The search was limited to English articles yielding 207 papers. Three pediatric hand surgeons selected the articles based upon the criteria that the topic was germane, the article fell under the subheadings within the manuscript, and the conclusions were meaningful.

RESULTS

A total of 40 papers were selected for review, based upon their quality and new findings. Research articles with significant findings were included for syndactyly, symbrachydactyly, cleft hand, polydactyly, radial longitudinal deficiency, congenital radio-ulnar synostosis, and macrodactyly.

CONCLUSIONS

Our knowledge of the embryology and pathophysiology of congenital upper extremity conditions continues to evolve. Functional assessments combined with patient and parent-reported outcomes have our understanding of the results following surgical procedures. Further research and standardization of our scientific data will provide better answers and higher quality of evidence.

LEVEL OF EVIDENCE

Level V-literature review and expert opinion.

Evaluation and Management of Preaxial Polydactyly

PURPOSE OF REVIEW

To provide a current review of the embryology, classification, evaluation, surgical management, and clinical outcomes related to preaxial polydactyly.

RECENT FINDINGS

Recent studies include a proposed embryologic link between preaxial polydactyly and other congenital abnormalities, an evaluation of long-term postsurgical outcomes, and an examination of important predictors for postsurgical outcomes. Preaxial polydactyly, while relatively uncommon, is a complex congenital hand abnormality that requires careful preoperative classification and proper surgical intervention timing to yield optimal outcomes.