Frontoethmoidal meningoencephalocele: appraisal of a craniofacial surgical teaching program in Cambodia

Microsurgery in low- and middle-income countries: Results of 20 years of experience in Cambodia

BACKGROUND

Microsurgical free tissue transfer is the gold standard for reconstructing major bone or soft tissue defects but requires complex training, and specific resources. Therefore, some authors have stated that microsurgery is impossible in low- and middle-income countries.

METHODS

Patients from Khmer underwent free flap surgery at the Children's Surgical Centre in Phnom Penh between 2004 and 2023. Two non-governmental organizations facilitated the program: Rose Charities Cambodia provided the facilities, patients and local staff, and Doctors of the World provided the surgeons, and anesthetists. At least one Khmer surgeon was trained during these operations. Digital data were collected retrospectively, and analyzed in June 2023.

RESULTS

Fifty-six free flaps in 54 patients have been performed since 2004. The most frequent sites requiring reconstruction were the head and neck (35.7%), lower limbs (30.4%), and upper limbs (21.4%). The most frequent free flaps were free fibula (44.6%), gracilis (19.6%), and anterolateral thigh (16.1%). Among the 56 flaps, 41 (= 73.2%) were viable long-term and 15 (26.7%) were microsurgical failures. Sixteen flaps underwent revision in the operating room. Twenty-three flap-related complications were reported in 21 patients with mostly vascular thrombosis (n = 12), hematoma (n = 3) and infections (3). However, 83.3% had improved or were cured of their initial pathology after final surgical management.

CONCLUSIONS

Free flaps performed in our series as part of international surgical collaborations in a low-income country are feasible, but we experienced higher failure rates, and later revisions compared to the results in high-income countries. We identified several solutions to improve the microsurgery outcomes in low-income settings.

Evaluation of long-term results following surgical correction of frontoethmoidal encephalomeningocele

INTRODUCTION

Frontoethmoidal encephalomeningocele (FEEM) is a neural tube defect with herniation of intracranial contents through the anterior skull base at the foramen cecum. Management is surgical and aims to remove the excess meningoencephalocele tissue and perform facial reconstruction.

CASE PRESENTATION

We report on two cases of FEEM that presented to our department. A diagnosis based on computed tomography scans revealed a defect in the nasoethmoidal region (case 1), and a defect was found in the nasofrontal bone (case 2). Surgery was performed using a direct incision over the lesion (case 1) and a bicoronal incision (case 2). Treatment in both cases gave a good outcome, and there was no increase in intracranial pressure and neurological deficits.

DISCUSSION

The management of FEEM is surgical. Appropriate timing and careful preoperative planning minimize the risks of intraoperative and postoperative complications. Both patients underwent surgery. Different techniques were required in each case, considering a significant difference between the lesion size and the resultant craniofacial deformity.

CONCLUSION

Early diagnosis and treatment planning is vital to achieving the best long-term outcome for these patients. In the next stage of patient development, follow-up examination plays a vital role so that further corrective actions can provide a good prognosis.

Surgical Implications of the Anteriorly Displaced Segments of the Anterior Cerebral Artery in the Management of Frontoethmoidal Meningoencephalocele

BACKGROUND

Preservation of the anterior cerebral arteries (ACAs) is important in the surgical management of frontoethmoidal meningoencephalocele (FEME). This would avoid complications related to the loss of blood supply to the part of the brain supplied by the ACA. Previous reports have identified hydrocephalus, microcephaly, cerebral dysplasias amounting to a 15% to 20% prevalence of brain anomalies in patients with FEME. What has not been previously reported are cerebral vasculature changes in the frontal region in FEME and how these may impact on the surgical correction and clinical outcome.

METHODS

Two patients of FEME that demonstrate cautionary radiologic findings in relation to the ACAs and anterior fossa anatomy are discussed.

RESULTS

The ACA in a 4-year-old boy with FEME was displaced anteriorly with the long A1 segments that extend into the defect. In the 2nd patient, a 4-year-old girl, we report on the complications related to the injury of ACAs from a previously partially resected FEME.

CONCLUSION

The importance of the anterior cerebral vasculature around the FEME during surgery is crucial to prevent complications resulting from damage to a looping A1 segment of the ACA.