Treatment of the hands and feet in Apert syndrome: an evolution in management

Apert syndrome is a relatively uncommon condition that is instantly recognizable on the basis of the pan-syndactylies involving both the hands and feet. For more than 10 years, the treatment of Apert syndrome hand and foot anomalies was approached in a comprehensive manner, with attempts to maximize the final results and minimize the total number of operations. Numerous conventions were abandoned in the development of this approach, with the introduction of some new methodologies, including (1) release of all 10 fingers, and toes, in only two operations, (2) elimination of routine digital amputations, (3) abandonment of the zigzag incision in favor of straight-line release, (4) substitution of equal-length anterior and posterior flaps for the long dorsal web space lining flap, (5) leaving of small areas of exposed bone without vascularized tissue coverage, and (6) performance of midphalangeal osteotomies, among older children, to improve hand function. Fifty-seven children with Apert syndrome have been treated at the author's center since 1990, and 43 underwent surgical treatment of their hands and feet by a single surgeon. Treatment can be separated into two phases, early (syndactyly releases) and late (functional osteotomies). Seventeen of those 43 patients were treated at the author's center from birth (type I, 11 patients; type II, two patients; type III, four patients), and 10 fingers and 10 toes were achieved for all patients in two operations. No digital amputations were performed for any of the 43 patients. However, four of 26 patients (15 percent) not treated at the author's center from birth had undergone at least one digital amputation before coming to the center. Twenty-two of those 26 patients required a two-stage syndactyly release to accomplish the separation of all 10 fingers and toes. Aside from the patients who had previously undergone amputations, all other patients successfully achieved 10 fingers and toes, except for one patient (38 of 39 patients, 97 percent). The average operative time for the first-stage syndactyly release of the hands and feet was 4 hours 11 minutes (range, 185 to 300 minutes), and that for the second stage was 3 hours 49 minutes (range, 160 to 300 minutes). Twenty-eight hands were treated with functional osteotomies, which involved permanent angulation of the fused phalanges at the proximal interphalangeal level, to create a "position of function" and provide pulp-to-pulp pinch. In addition, targeted osteotomies of the feet were performed for many of these patients, to decrease pain with walking. There were no major complications. Minor complications included one reexploration because of bleeding, early in the series. There were 13 incomplete secondary syndactylies that required a subsequent operative release (10 spaces treated at the author's center and three treated elsewhere), of a total of 342 spaces (3 percent author incidence). There were no scar contractures or functional limitations that required release. This distinctive protocol seemed to result in improved functional outcomes, with a reduction in the total number of operative procedures.

Long-term results of syndactyly correction: full-thickness versus split-thickness skin grafts

In order to compare the long-term results of full-thickness and split-thickness skin grafts after the correction of congenital syndactyly, 27 patients have been investigated after an average follow-up of 21 years. Post-operative functional and cosmetic results have been assessed by patient records, questionnaires and physical examination. The webs that had received split-thickness grafts showed more flexion and extension lags and the overall spreading of the operated fingers was significantly decreased compared to the control fingers. On the other hand, more re-operations because of web creep had to be performed after full-thickness grafts. Hyperpigmentation and hair growth in the grafts was found in most of the full-thickness grafts, while breakdown of the graft was found in some of the split-thickness grafts. Therefore, based on the results of this study, either full- or split-thickness skin grafts can be used when treating of congenital syndactyly.

The ectrodactyly-ectodermal dysplasia-clefting syndrome (EEC): report of five cases

We report five patients from two different pedigrees with the ectrodactyly-ectodermal dysplasia-clefting syndrome (EEC). All had features of ectodermal dysplasia, but only three had limb ectrodactyly and orofacial clefting. The present patients illustrate the great phenotypic variability in the EEC syndrome. As no single feature, including any of the three cardinal signs, is mandatory for syndrome diagnosis, a meticulous examination of all family members is needed.

Free hand-to-toe transfer: a method to minimise donor-site morbidity in free joint transfers

Reconstruction of a congenital hand anomaly in a child using single free vascularised transfer of the proximal interphalangeal joint of a second toe with the simultaneous microvascular reconstruction of the donor toe using the stiff joint and its dorsal skin paddle from the hand is described. This is not the first reported case of a toe-finger switch, but it is the first in a free joint transfer, for which it is especially indicated.

[Microsurgical repair of syndactyly of the fingers in children]

OBJECTIVE

To evaluate the effectiveness of microsurgical technique for repairing syndactyly of the fingers in children.

METHODS

Microsurgical repair of syndactyly of the fingers was performed in 32 children. The skin joining the syndactyly was incised and relaxed under microscope, and dorsal metacarpal flap of comparable size was used to repair the lateral skin defect of the finger and also to reconstruct the finger web.

RESULTS

All the flaps survived without scar leaving on the lateral skin of the fingers, and the reconstruction of the finger web was satisfying.

CONCLUSION

Microsurgical technique is applicable in the surgical repair of syndactyly of the fingers in children.

[Dystrophic epidermolysis bullosa: surgical treatment of advanced hand deformities]

Dystrophic epidermolysis bullosa (Hallopeau-Siemens, recessive dystrophic epidermolysis bullosa) is a rare inherited disorder of the skin and mucosa, characterized by blistering in response to the slightest mechanical trauma. Healing is associated with scarring and the formation of contractures and milia. Following repetitive trauma (friction), this process leads to severe hand deformities with digits contracted in flexion, the thumb contracted in adduction and pseudo-syndactyly. In advanced cases (as described here), the hands show a mitten-like deformity and digits are encased in an epidermal "cocoon". This results in complete loss of function with major consequences for both the patient's (children's) daily life and their psychosocial development. We demonstrate the advantages of the (simplified) surgical procedure including "de-cocooning"/degloving, syndactyly-release, release of the thumb and the digital joint contractures and Kirschner-wire stabilization. Spontaneous epithelialisation of skin defects proved to be unproblematic and advantageous compared to skin transplantations, flaps, keratinocyte transplantations and other more ambitious procedures. Reviewing the published long-term results of other methods, we favour the procedure described because it simplifies and accelerates the overall treatment. From 1998 to 2001, we treated three children with recessive dystrophic epidermolysis bullosa and five hands were operated. A total number of 23 interventions was necessary (21 x using face masks, 2 x oral intubation). Pseudo-syndactyly (digits II - V, partially or totally) occurred in four hands after six to ten months. Flexion contractures of the digits occurred in two hands after eight to ten months. Limitating adduction contracture of the thumb occurred in two hands after eight to twelve months. Digital function (pinch and grasp) was actually preserved in two hands for 15 to 30 months. An active surgical approach is justified by the gain in functional improvement of the hand - even if only temporary - and, consecutively, by the positive effect on the child's development.

Ulnar-sided cleft hand

Three cases of ulnar-sided cleft hand are presented in which clefting was accompanied by ring finger absence in 2 and by small finger abduction, supination, shortening, and camptodactyly in all 3. An approach to surgical reconstruction is described with marked improvement in appearance.

Reconstruction of the hand in Apert syndrome: a simplified approach

Children born with Apert acrocephalosyndactyly pose great challenges to the pediatric hand surgeon. Reconstructive dilemmas consist of shortened, deviated phalanges and extensive skin deficits following syndactyly release. We present a 10-year review of patients with Apert acrocephalosyndactyly who were treated with a simplified surgical approach. Between 1986 and 1996, 10 patients with Apert syndrome underwent reconstructive surgery of their hands. The overall strategy involved early bilateral separation of syndactylous border digits at 1 year of age, followed by sequential unilateral middle syndactyly mass separation with thumb osteotomy and bone grafting as needed. In these 10 patients, a total of 53 web spaces were released, 49 of which involved osteotomies for complex syndactyly. Only local flaps and full-thickness skin grafts from the groin were used in all cases to achieve soft-tissue coverage. To date, seven of the 53 web spaces have needed revision (revision rate, 13 percent). Eleven thumb osteotomies (nine opening wedge and two closing wedge) were performed. Bone grafts from the proximal ulna or from other digits were used in all cases. To date, none of these thumb osteotomies have needed revision. This early, simplified approach to the complex hand anomalies of Apert acrocephalosyndactyly has been successful in achieving low revision rates and excellent functional outcomes as measured by gross grasp and pinch and by patient and parent satisfaction.

[Surgical treatment of hand syndactyly in Apert syndrome]

Authors describe 6 cases (3 women, 3 men) affected by Apert syndrome (acrocephalosyndactyly). Clinical material has been documented since 1953. They concentrate on the description of individual clinical cases on the basis of objective and radiograph examination of patients. They describe surgical procedure of syndactyly between the thumb and 2nd-5th digits on both hands. Prior to 1998 they started with separation of digits at the age of 3-5 years. After 1998 they began with it as early as at the age of 3-6 months. For the reconstruction of lateral aspects of separated digits and for the creation of inter-digital space they use "zig-zag" incision and for covering the resulting skin defects they use skin transplants. During separation of 2nd-4th digits they extirpate all phalanges of 3rd digit and they leave metacarpal III in situ by which they create a three-digit hand with a relatively good functional result.

Congenital syndactyly: defatting facilitates closure without skin graft

We attempted to correct 24 syndactylies without skin grafts in 16 consecutive patients. Digital volume was decreased by defatting the full length of the fingers and the interdigital space. Closure of the zigzag incisions on both fingers could then be achieved with minimal tension and did not seem to be related to the type of flap used for commissure resurfacing. We used 2 different types of flap closure. We noted that defatting was a more important determinant of whether the wound could be closed without graft than flap configuration. The new type of flap may represent an improvement for web appearance but is not a determination for finger closure. Only a complex syndactyly involving 3 adjacent atrophied fingers required a skin graft for separation. The results were evaluated after a mean follow-up period of 22 months. Three patients had a complication: an intraoperative digital nerve laceration, a scar contracture, and a recurrence of the treated commissure due to local infection. Two patients needed another surgical procedure. Supple and good quality scars were observed in the other patients. No conspicuous change in finger contour compared with the nonsyndactylized fingers was observed.

[Reconstruction of nail folds by double pulp flap in congenital complete syndactyly release]

OBJECTIVE

To introduce a surgical approach for reconstruction of nail folds in congenital complete syndactyly release.

METHODS

A narrow flap and a broad flap were raised on the common distal phalanx to cover the denuded nail-edge in 30 fingers of 15 cases whose webs were separated.

RESULTS

All of the flaps were successfully transferred and survived. The reconstructed nail folds had satisfied figure in 21 out of 30 fingers. The nail folds in the other 9 fingers, covered by a broad flap in 2 fingers and by a narrow flap in 7 fingers, were a little smaller than normal. All of the 30 fingers had normal fullness of pulp and no twisty nails.

CONCLUSION

The reconstruction of nail folds by double pulp flap can be performed with a one-stage technique, and the outcome is satisfactory, which make it as a good surgical approach to reconstruct nail folds in congenital complete syndactyly release.

A comparison of patients with different types of syndactyly

We performed a retrospective review of finger syndactyly releases at Shriners Hospital for Children, Houston Unit, between January 1983 and January 1993. This study was performed in an attempt to compare the long-term postoperative function in patients after release of syndactyly resulting from Poland's syndrome with that in patients with idiopathic forms of syndactyly. Only patients with one involved hand were included in this study. The contralateral hand was used as a control. Twenty-seven patients with only one hand involved underwent syndactyly release during this period. Of these, 13 patients who underwent a total of 30 syndactyly releases were available for evaluation. For each patient, the type of syndactyly was determined. Each patient was subjected to a detailed physical examination and participated in occupational-therapy modalities. We noted statistically significant differences in function between operated-on and control hands in the Poland's group, whereas operated-on hands affected with idiopathic forms of syndactyly did not demonstrate significantly different function compared with contralateral controls. These data suggest that functional deficits in hands affected by Poland's syndrome are attributable to more than the syndactyly alone. Hands affected by idiopathic forms of syndactyly are likely to have little postoperative functional deficit.

The use of split thickness skin grafts in the correction of Apert's syndactyly

Stiffness of the interphalangeal joints of the fingers is a constant feature of Apert's syndrome. Because of this stiffness, the author has used split-thickness skin grafts when correcting Apert's syndactyly, thinking that contraction of such grafts post-operatively would not cause any joint contracture or finger deviation. This paper reports the results of eight patients whose average age at first surgery was 6 months. Separation of all digits was accomplished before the age of 2 years. A dorsal rectangular flap and interposing triangular digital flaps were utilised to create the web space and partially cover the skin defects in the fingers. The remaining digital defects were covered with thin split-thickness skin grafts which took fully in all cases. At final follow-up (1-6 years), the areas covered by skin grafts have reduced in size significantly because of skin graft contraction. However, this did not result joint contracture or digital deviation.

The open finger technique for the release of syndactyly

A new technique of syndactyly release is described. The technique differs from the standard methods in that more digital flaps are used, and these are longer and are not defatted. A single stitch is applied to secure the tip of the flap and the defects between the flaps are not closed or grafted, hence the term "open" technique. Eight patients had 12 webs released using this operation. We compare this technique with 12 patients who had a total of 19 webs released using the standard technique. Patients were assessed for six parameters of operative success.