Complex Syndactyly Research Articles

Bilateral Syndactyly Release of Third and Fourth Fingers

Syndactyly is amongst the most frequent congenital hand anomaly. Syndactyly is termed simple when the digits are connected by soft tissue only, complex when one or more phalanges are fused. In complicated syndactyly, there are additional bony elements in between the digits making it challenging if not impossible to separate safely. The patient in this case is a 1-year-old male with complex syndactyly of the left hand and simple syndactyly of the right hand. Here, we release both sides, with the left side involving a full-thickness skin graft taken from the patient's groin crease. This case was filmed during a surgical mission with the World Surgical Foundation in Honduras.

A new concept of webspace reconstruction in syndactyly - An easily reproducible cross-shaped advancement flap

Background and objectiveThe use of sizable dorsal flaps for webspace reconstruction without skin grafting can minimize complications in syndactyly correction. We report the technique and results of a cross-shaped advancement flap for reconstruction of the webspace and coverage of the lateral sides of the bases of the separated fingers in congenital syndactyly. MethodsFrom June 2018 to July 2020, 15 patients with simple or complex syndactyly for webspace reconstruction with a dorsal cross-shaped advancement flap were retrospectively studied. The patients' ages ranged from 5 to 144 months, with a median age of 12 months. Out of these 15 patients, six patients were suffering from bilateral involvement. Withey grading of web creep was used for postoperative evaluation. Scar hyperplasia was assessed using the Vancouver Scar Scale, and Visual Analogue Scale was applied to evaluate the subjective satisfaction of the children's families with the reconstructed finger appearance, pain and function. ResultsThere was no perioperative complication in the group. During an 8–17 months follow-up period, no secondary correction was needed in this group. The average score of Withey scale was 0.1, and Vancouver Scar Scale was 1.5. The Visual Analogue Scale score of appearance, pain and function was 1.8, 0.2 and 1.1, respectively. ConclusionThis technique can reconstruct the webspace and cover the lateral wall of the fingers for syndactyly correction without the risk for web creep or hypertrophic scar.

Rare Occasion of Congenital Anomalies: Bilateral Syndactyly with Multiple Polydactyly of the Hands and Feet

Introduction: Upper and lower limb malformations are essential things that occur related to congenital disabilities, including syndactyly and polydactyly. It may appear in association with other birth defects as a part of a syndrome and may be present in the upper extremity or lower extremity. Cases of bilateral syndactyly with multiple polydactyly of the hands and feet are the first time in our center, and they must be promptly diagnosed and treated to avoid functional and cosmetic problems. Case presentation: A 3-month-old male toddler presented with webbed index, middle, and ring fingers with synonichia, accompanied by additional fingers on hands and feet. An x-ray examination revealed preaxial polydactyly at both hands with bifid phalanx (Wassel classification) and postaxial polydactyly type B. Duplicated postaxial metatarsal (Venn-Watson classification) and type B postaxial polydactyly also occur on both feet with webbed index and middle toe on the left foot. Direct closure was achieved with a dorsal trapezoidal and zig-zag flap to release the second and third fingers of the right hand, followed by resection of rudimentary fingers to help the child with early stages of motoric functions. Discussion: Syndactyly can cause a length difference that results in growth and functional difficulties. Surgical release of the index to middle and middle to ring fingers should be done early between 3-6 months of age and is expected to help the child grasp, write, and subsequently manipulate objects. We prioritize operating the right hand as around 90% of people prefer to use the right hand. Simple ligation was also performed to recess the rudimentary fingers on both hands and feet. It has no functional benefit and can limit function as it may get caught or make it difficult to wear shoes and gloves. We have to remind the parents that multiple surgeries may be necessary to achieve a satisfactory result and to complete the reconstruction before 24 months of age when the patterns of function of the digits are established. Conclusion: Bilateral complex syndactyly with preaxial and postaxial polydactyly on both hands and feet are distinctly uncommon entities that need multidisciplinary treatment. In this instance, the syndactyly releasing of the second and third fingers on the right hand is prioritized based on the function to be achieved, with excision of the rudimentary fingers.

Revisiting Radiographic Characteristic of the Hands in Apert Syndrome: A Literature Review with Cases

Introduction: Syndactyly of the hand in Apert syndrome involves all components of the hands. In 1991, Joseph Upton introduced a comprehensive classification of the Apert hands based on its severity. Plain x-ray is the most commonly used to evaluate bony abnormality. Case Presentation: We present two cases with classic characteristics of Apert syndrome with demonstrated different types of Apert hands; type II and type III. Radiographs exhibited bony deformities with typical misalignment and multiple osseous formations in several parts of phalanges. Discussion: Apert hands present complex syndactylies involving the index, middle, and ring fingers in different stages regarding Upton’s classification system. Almost all Apert hands also lack the active motion of the interphalangeal joints. The ossification allowed the synostosis and symphalangism to become evident on radiographs. The abnormality of the epiphysial growth causes short and deviated fingers. Conclusion: Apert hands demonstrate complex deformity involving bony structures that developed prenatally and postnatally. Typical deformities including complex syndactyly, clinodactyly, and symphalangism.

Syndactyly in the Pediatric Population: A Review of the Literature.

Syndactyly is one of the most common congenital upper extremity deformities. Syndactyly can be described as either simple, involving just the skin and soft tissue, or complex, involving the phalanges. Additionally, syndactyly can be categorized as complete, involving the entire digit (including the nail fold), or incomplete, which does not involve the nail fold. Multiple familial or spontaneous genetic abnormalities can cause syndactyly, and these mutations typically involve the canonical wingless-type (WNT) pathway. Surgical repair of syndactyly is typically done between six to 18 months of age, depending on the type of syndactyly. Regardless of the classification of the syndactyly, the repair is performed before school-going age (except in the case of extremely mild or rare, extremely complex syndactyly). One or more imaging modalities are used to aid the surgeon in deciding the surgical approach for the syndactyly repair. The surgical plan must be clearly communicated with parents to manage expectations of aesthetics and function of the digits post-surgery. In brief, a syndactyly release surgery involves the creation of the web space using a geometrical design of the surgeon's choice, defatting of finger flaps, separation of the digits, and closure with absorbable sutures. However, the approach may vary depending on the patient. A "best" approach for rectifying the difference in surface area of separated versus fused digits has not yet been determined. While this was typically done using a skin graft, the use of alternative methods (most notably, using a synthetic dermal substitute or not using a graft at all and allowing the skin to heal with secondary intention) has been on the rise given the undesirable side effects of a graft. Less commonly, an external fixator can be used to expand soft tissue and skin. In the case of complete syndactyly, the Buck-Gramcko technique is most commonly used for nail flap reconstruction. Complications of the surgery include contracture, web creep, and the need for a second surgery. Thus, parents must be counseled in recognizing signs of complications.

Orthopaedic Diagnoses in the Black Pediatric Population.

The Black pediatric population is one that has been historically underserved and continues to have unmet needs. Factors including lack of diversity in orthopaedic studies and in historical standards, such as bone age, may inadvertently lead to inferior care. There are certain conditions in this population for which the practicing orthopaedic surgeon should have a higher degree of suspicion, including slipped capital femoral epiphysis, Blount disease, and postaxial polydactyly. Systemic diseases with higher rates in this population have orthopaedic manifestations, including sickle cell disease, vitamin D deficiency, and obesity. Racial discrepancies in access to prenatal care can have orthopaedic consequences for babies, especially cerebral palsy and myelodysplasia. Racial discrepancy exists in evaluation for nonaccidental trauma. Increased awareness of these issues better prepares practitioners to provide equitable care.

The Oberg, Manske, and Tonkin Classification of Congenital Upper Limb Anomalies: A Consensus Decision-Making Study for Difficult or Unclassifiable Cases

An ideal classification system promotes communication and guides treatment for congenital upper limb differences (CULDs). The Oberg, Manske, and Tonkin (OMT) classification utilizes phenotypic presentation and knowledge of developmental biology for the classification of CULDs. In this consensus decision-making study, we hypothesized that CULDs that are difficult to classify would be identically classified by a group of experienced pediatric hand surgeons. An international consortium of 14 pediatric hand surgeons in 3 countries contributed a group of 72 difficult-to-classify CULD cases. These were identified from the clinical practices of the surgeons and from associated registries. Through a Delphi-type process, repeated efforts were made to obtain consensus for the correct OMT classification of each case utilizing clinical images and radiographs. The first round of discussion yielded a universal consensus for 57 cases. The remaining 15 cases continued to be put through additional rounds of the Delphi-type process. The repeat classification and discussion resulted in a final yield of 93% complete consensus in classification by the OMT. The primary challenge in diagnosis was differentiating cleft hand from ulnar longitudinal deficiency, identified as group A. Five cases were in this group, yet 2 remained without a clear consensus. Another controversial group, group B, was termed "brachy-polydactyly" and consisted of 3 cases where diagnoses varied between sympolydactyly, symbrachydactyly, or complex syndactyly. The Delphi-type process was feasible and effective and allowed a 93% consensus in the diagnosis of difficult-to-classify cases by the OMT Classification. There remain limitations and controversies with the OMT system, especially when classifying hands with less than 5 skeletal digits, syndactyly, and those with diagnostic overlap between ulnar longitudinal deficiency and cleft hand and those considered "brachypolydactyly." An improved understanding of the underlying etiology may be needed to determine the final diagnosis in difficult-to-classify conditions. A consensus-seeking approach is effective and feasible in addressing difficult-to-classify CULDs.

Separation of congenital embryonic syndactylies in children: dorsal or volar flap? About a comparative retrospective series.

Congenital syndactylies account for 1 to 2 out of 2000 birth defects. Although several types of syndactylies exist, we only studied embryonic syndactylies. The goal of our study was to compare 2 types of coverage flap for the reconstruction of the finger web spaces: a volar flap described by Blauth and a dorsal flap described by Gilbert. Between 1993 and 2015, children affected by simple and complex syndactylies (partial or complete) were treated in 2 french pediatric hospitals and were selected for our analytic, comparative, retrospective review. The 2 hospitals used different surgical techniques: one used a volar flap described by Blauth and the other a dorsal flap described by Gilbert. The children were followed up to look for signs according to the stages of the Classification of Withey and to evaluate a global result according to the score of Withey. Our secondary criteria of judgement were the aspect of the surgical scar according to the VSS (Vancouver Scar Scale) and the satisfaction of the parents and children. The age of the children, need for a surgical revision and time of last follow- up were also studied. We found statistically significant differences between group I (volar flap) and group II (dorsal flap) in favor of the volar flap: higher scores of Withey (even when the number of commissures was increasing) and better VSS (regardless of the number of web spaces treated). There was no statistically significant difference between the 2 groups in terms of age, follow-up, or rate of surgical revision. All in all, the volar flap presented less sequelae in terms of scar retraction. Regardless of the flap used, the cosmetic results of the full-thickness skin graft used impacted the result both on the receiving site (dyschromia, hairiness) and the donor site.

Functional Outcome of Syndactyly Repair in Children

Background: As the most prevalent form of congenital hand malformation, syndactyly carries significant aesthetic and practical implications. For the vast majority of situations, surgery is the best option. Congenital syndactyly can be repaired with skin grafts and local flaps, however the results are often less functional and cosmetic than anticipated and often leave scars and residual syndactyly. So we set out to find out how children's syndactyly healing went in this study.1 Objective: To analyze the functional outcome of syndactyly repair in children presenting in a tertiary care hospital. Methodology: This Descriptive case series was conducted at Department of Plastic and Reconstructive Surgery, LUMHS Jamshoro / Hyderabad for 6 months. Sample size of 180 cases was recruited through Non-probability consecutive sampling. Then all patients underwent surgery under general anesthesia. In all cases, procedure was performed depends upon the type / extent of syndactyly. Then patients were discharged after recovery and were followed up on 1st, 2nd and 3rd months post operatively for assessment of functional outcome of syndactyly repair i.e. no supination and no pronation was noted. All this information was noted on proforma. Data was entered and analyzed using SPSS 22.0. Results: The mean age of children was 6.30+3.55. There were 66 (37%) females and 114 (63%) male in the sample. There were 128 (71%) cases of simple syndactyly and 52 (29%) cases of complex syndactyly. There were 127 (71%) cases who had no-supination, 162 (90%) cases who had no-pronation. There was significant difference observed between both type of syndactyly (P<0.05) for supination while insignificant for pronation. Conclusion: Thus we have found that syndactyly repair is effective technique through which we can attain success in maximum number of patients which can help in achieving normal angulation of fingers after surgery. Key words: Syndactyly, Pronation, Supination, Angulation, Children

Hand and Upper Limb Malformations in Italy: A Multicentric Study.

Background: Although hand and upper limb malformations are quite frequent, up to now very few reports have been published on epidemiology. The aim of this study is to evaluate the number of infants who presented with hand and upper limb malformations from 2010 to 2015 in Italy. Methods: A retrospective analysis of a pediatric population presenting with hand and upper extremity malformations was carried out, gathering reports achieved from eight Italian Centers of pediatric hand surgery. Other factors such as gender, date and region of birth, family distribution of malformations and associated syndromes, were analysed. Results: Out of 3,100,421 live births, 765 children presented with hand and upper limb malformations. The incidence was 2,5/10,000 live births with a predominance of males and the right side. Radial polydactyly was the anomaly with the highest percentage, closely followed by simple syndactyly, simbrachidactyly and complex syndactyly. Less common conditions were the triphalangic thumb, thumb in palm, proximal radioulnar synostosis and Sprengel deformity. Inheritance of and familial predisposition to those malformations was recorded in 25 cases, while 84 children presented with syndromes related to hand anomalies. Conclusions: In conclusion the incidence of hand and upper extremity malformations in Italy is lower than that registered in other countries. The retrospective nature of the study combined with the fact that some defects frequently evade pediatric hand surgeon consultations are some possible limitations of the study. However, our data confirmed that, in spite of the decrease in the birth rate in Italy, the trend of congenital hand disorders maintained a stable trend. We aim to integrate this study with a prospective analysis and to involve the institutional health authorities in other countries so as to register the correct incidence of hand and upper extremity defects.

Surgical Technique for Complex Syndactyly in Apert Syndrome : A Serial Case

Abstract: Complex syndactyly in Apert syndrome, especially complicated with synonychia and synostosis, is a surgical challenge. The incidence of Apert Syndrome is reported to be approximately 1 per 100.000 to 160.000 live births and its incidence in Indonesia is not yet known. It is practically symmetrical causing significant dysfunction and infection if not treated properly. The goals in the treatment are separation of independent digits without disturbing function and growth, creation of a lined commissure, provision of skin cover for the denuded nail edge and exposed bone, and to create aesthetically pleasing individual fingertips with proper nails, nail folds and adequate pulp fullness. Many variations of surgical release of the first web space and of the remaining syndactyly have been described. Various approaches to the bony deformity of the thumb have also been described. All previously described techniques advocate releasing a single side of a digit at any given surgery to maintain the vascularity of that digit. This is due to the unreliability of the vascular branching pattern to the digits. In this serial case, we reported 5 cases of Apert syndrome. We described the clinical findings, incision design, immediate and post-surgery follow ups. The results were uneventful, with satisfying function and aesthetic appearance.

Satisfying Clinical and Functional Results in 12 Apert Children Treated With Soft Tissue Distractor.

The complex syndactyly in Apert syndrome hands is challenging to operate. The synostosis and tightness of skin between third and fourth digits lead to severe coverage problems during ray release. A soft tissue distractor can simplify the release with the aim to keep all 10 fingers. A retrospective follow-up of 12 patients/24 hands, median age 8 years (6 to 17 y), 6 boys and 6 girls, operated between 2000 and 2013 was done from 2015 to 2016. The surgical management started with syndactyly release of the first and fourth web, and later of the second. The third stage was placing a soft tissue distractor on the third and fourth finger after osteotomy on the synostosis between them. Four weeks of distraction and 2 weeks of rest resulted in regenerated skin between the digits giving much better coverage of the released digits at time of separation 6 weeks later. Assessment of hand function, grip strength and completion of the Patient Reported Outcome Measure CHEQ was performed. Soft tissue coverage at the time of digit separation was considerably facilitated. We experienced 2 infections in 2 hands. In 18/24 hands median 2 (1 to 3) small full thickness skin grafts were needed, usually for coverage of the base of the digits. All wounds healed well. The children managed different practical tasks well, alternating between best functioning grip depending on the activity. According to CHEQ, the children did median 19 (13 to 27) activities independently and median 8 (2 to 15) nonindependently, of a total of 29. Peak strength values for 10/12 children were for the right hand median 17.8% (9.6% to 40.6%) of normative data and for left hand median 13.6% (2.4% to 20.5%) of normative data. Soft tissue distraction facilitates the treatment of acrocephalosyndactyly hands, giving 5-fingered hands. Apert children manage many activities independently but struggled with fine motor skills demanding strength. Level IV evidence.

The use of abdominal flaps for complex syndactyly release: a case series

The use of abdominal flaps for complex syndactyly release: a case series

Deviation and Atrophy of Middle Phalanx of Hand Following Partial Separation in Syndactyly Patient: Their Fault or Ours?

Backgrounds: Syndactyly is failure of differentiation in which the fingers fail to separate into individual appendages. It is the most common congenital hand anomaly, with an incidence of 1 in 2,000 to 2,500 live births. Surgical separation of fingers as early as 6 month-old is indicated when syndactyly involves digits of unequal length (i.e., ring and little fingers). Early separation is also required in complex syndactyly and cases of acrosyndactyly. The timing of surgery of all other cases of syndactyly remains somewhat controversial; most suggest surgical correction before age of 18 months, whereas others prefer to wait until after this age.Case Presentation and Operation Technique: A 13-year old boy, presented with fusion of all fingers of the right hand at birth. Prior to his current visit, he underwent partial separation of the right fingers at the age of 6 y.o. at a local hospital. Following partial separation, the fingers did not grow normally. Current X-ray showed atrophy and deviation of middle phalanx. We performed separation of syndactyly between index and middle finger, and between fourth and small finger in our hospital. Interdigital webbings are released using local flap and the remaining raw surface is covered using full-thickness skin grafts. On follow up, the patient showed good functional and aesthetic outcome. He is able to write with his right hand with better coordination.Discussion: Complex syndactyly reconstruction is a challenging surgical problem. Common post surgical findings include rotational deformity, angular deformity, and nail deformity. We describe how we have altered our approach in these findings.Conclusion: Congenital syndactyly should be corrected early in life. Careful dissection, the use of a dorsal rectangular flap in combination with 2 volar triangular flaps, and use of full thickness skin grafts ensure a satisfactory outcome and minimize the number of operations per web

Using Dermal Fat Graft to Release Complex Syndactyly: A New Method.

Using Dermal Fat Graft to Release Complex Syndactyly: A New Method.

Management of Paronychia in Patients With Apert Syndrome.

Apert syndrome is a complex congenital syndrome that includes bicoronal craniosynostosis, craniofacial dysmorphologies, cleft palate, hearing loss, spina bifida occulta, cardiac anomalies, and affects the upper and lower extremities-producing complex syndactyly in these patients. Management of the hands yields several challenges and mandates close follow-up to balance repair of complex polysyndactyly with other pressing interventions, such as posterior cranial vault distraction and surgical management of the airway. Our goals of therapy for the hands are to preserve 10 digits, provide sufficient soft tissue coverage, optimize hand function, and minimize the number of surgical interventions. Ideally, surgical management of the hand differences occurs between the ages of 9 months and 2 years, to optimize neurocognitive development. In complex syndactyly observed in patients with Apert syndrome, there are broad, conjoined nail plates that overlie the fused digits, and paronychia occurs frequently. Suppurative infections can delay definitive surgical intervention for the patient's complex syndactyly, and resolution of paronychia is critical. This study aims to propose an effective and safe technique to manage paronychia when it occurs in patients with Apert complex syndactyly and to mitigate the length of delay to definitive polysyndactyly reconstruction. In the context of these patients' need for multiple surgical interventions within the first few years of life, this strategy for preventing or mitigating paronychia can play an important role in streamlining their complex surgical management while avoiding multiple cancellations.

Radiographic Characteristics of the Hand in Apert Syndrome.

Background: In a small series, it has been postulated that delayed release of complex syndactyly of the 3rd web in Apert syndrome patients causes compression on epiphyses, with early epiphyseal closure, leading to symphalangism and reduced capitate ossification. We wished to see whether this remains true in a larger series. Methods: We reviewed radiographs of 48 patients (86 hands) with Apert syndrome seen in the department of Plastic and Reconstructive Surgery, Great Ormond Street Hospital, between the years 2001-2012. Patients underwent surgical release of syndactyly in a staged fashion with the 3rd web release left until last. We measured the size of the capitate ossification center relative to that of the hamate and determined the relative position of the middle finger metacarpal relative to the ring finger metacarpal. Results: We found agreement with many findings, however we weren't able to demonstrate the catch-up growth of the capitate after release of the third web. The failure of normal distal migration of the 3rd metacarpal appeared to occur until the 3rd web release is performed. Conclusions: Consistent findings of delayed ossification of the capitate and failure of normal distal migration of the third metacarpal add support to the initial hypothesis, however, we cannot fully conclude that an earlier release of the third web is recommended, further research is still needed.

External fixation: Role in decreasing postoperative complications of complex syndactyly release – A review of 18 patients

BackgroundPrimary and revision surgery for complete complex congenital syndactyly (CCCS) of the hand carries a risk of complications such as web maceration, which can result in flap or graft loss and alter the final appearance. No consensus emerges from the scant published data on postoperative care after CCCS surgery. The objective of this study was to assess the role for temporary external fixation in stabilising the commissure and facilitating surgical wound care. HypothesisUsing external fixation after CCCS release facilitates postoperative wound care and decreases the complication rate. Material and methodsEighteen patients requiring primary CCCS surgery or revision CCCS surgery due to adhesions or web creep were included in a single-centre retrospective study. After release, an external fixator made of Kirschner pins was installed to temporarily immobilise the inter-phalangeal joints. The dressing was changed every 3 days for 3 weeks, and the external fixator was then removed. The parents and nurses completed questionnaires that used 0–10 point scales to assess ease and duration of dressing changes and perceptions and apprehensions experienced by parents and nurses, as well as pain by patients, during dressing changes. ResultsNo patient experienced maceration or failure of a graft or flap. Pin site discharge was noted in 1 patient and resolved fully after pin removal. Pain intensity was estimated at 4.2/10 during the first dressing change and 1.3/10 during the last dressing change. In the parents, apprehension was 9.6/10 and 5.1/10 during the first and last dressing changes, and stress was 8.1/10 and 4.1/10, respectively. Dressing change difficulty was rated 1.1/10 at the first and 0.9/10 at the last dressing change. Dressing change duration decreased from 13 to 10minutes. ConclusionThese encouraging results support temporary commissure stabilisation by an external fixator to decrease postoperative complication rates and facilitate dressing changes after CCCS release. Level of evidenceIV, retrospective observational study.

Évaluation du lambeau palmaire de Blauth lors de la prise en charge des syndactylies congénitales : à propos de 31 commissures

The main purpose of our study was to assess the web creep rate of congenital syndactyly treated with a Blauth palmar commissural flap. Every child with at least one syndactyly, simple or complex, syndromic or not, were included in this study. The main criterion of this study was the web creep rate according to the Withey scale (0 to 4). Scar assessment according to the Vancouver Scar Scale, hair growth and/or dyschromia on the full-thickness graft, digital spacing, flexion deformity, clinodactyly, range of motion of the finger, sensitivity and satisfaction were also assessed. Separation of the webbed fingers was performed in 65 syndactylies between 1993 and 2015. The median age at the time of surgery was 14 months. We reviewed 31 web flaps with a mean follow-up time of 9 years. Fifty eight percent of the webs were grade 0 on the Withey scale, 36% were grade 1, 6% were grade 2. There was no grade 3 or 4. No correlation was found between the age at the time of surgery, gender, web space involved, complexity of the syndactyly, and the web creep. A decrease in range of motion and a flexion deformity of the fingers involved were more frequently found in complex syndactylies. Eighty seven percent of full-thickness grafts presented dyschromia, and 42% abnormal pilosity. Palmar flap as described by Blauth is a safe technique ensuring good functionals outcomes and a low web creep rate for the reconstruction of the web space in congenital syndactyly.

Interdigitating Rectangular Flaps and Dorsal Pentagonal Island Flap for Syndactyly Release

Interdigitating triangular flaps is the most commonly described technique for syndactyly release. However, triangular flaps may be associated with flap misalignment, flap tip necrosis, and a steep learning curve in design and technique. This study describes a series of syndactyly reconstructions using interdigitating rectangular flaps in both simple and complex syndactyly. A single surgeon's experience of syndactyly reconstruction using interdigitating rectangular flaps was reviewed retrospectively. Patient demographics, associated syndromes, operative technique, complications, and recurrences were analyzed. Ninety-four web spaces in 50 children with 16 simple incomplete, 36 simple complete, 14 complex, 26 complicated, and 2 unclassified syndactylies were reconstructed with interdigitating rectangular flaps. Seventy-eight commissures were reconstructed with a dorsal pentagonal island flap and 16 with a dorsal rhomboid flap. Full-thickness skin grafts were used in 98% of webs. Five major complications required surgical intervention-2 recurrences, 2 web space scarrings, and 1 wound infection. Ten minor complications occurred-skin graft donor site dehiscence (3), partial loss of the skin graft (4), minor distal interphalangeal joint flexion contractures (2), and a case of minor web creep (1). Average follow-up was 13.7 months. All parents were satisfied with the function and appearance of their child's reconstructed digits. Interdigitating rectangular flaps provide an effective technique for release of both simple and complex syndactyly. Advantages include easy learning owing to the relative simplicity of design; intraoperative modification of flap design (cut as you go), and wide flap tips, which prevent flap tip necrosis. Therapeutic IV.