Quick answer
Nasopharyngeal carcinoma is treated with radiotherapy, and it works — but 2–10% of patients later develop necrosis of the nasopharyngeal and skull base tissues. The tissue dies slowly, the patient has severe headache and foul nasal odour, and the necrosis can erode into the internal carotid artery or the dura, causing fatal haemorrhage or intracranial infection. There was no agreed way to classify severity, and surgery to repair it was daunting. Yang Qintai's team at the Third Affiliated Hospital of Sun Yat-sen University, with the Sun Yat-sen University Cancer Center, built a grading system and a reconstructive technique over three years [1][3][5].
Key takeaways
- Complication rate: 2–10% of patients after combined treatment for nasopharyngeal carcinoma [5].
- Grading: the LDW system — extent of necrosis, involvement of critical structures, and symptom severity [1][3].
- Stages run from early through intermediate and severe to a fatal stage [3].
- Technique: fully endoscopic trans-submandibular anterior masseteric approach for free forearm flap repair, reported as a world first [1][2].
- Recognition: presented at the 2025 European rhinology congress and awarded a Guangzhou major clinical achievement prize [1][4].
Why a staging system changes management
Necrosis in this region is not one disease. Early lesions cause odour and mild headache; severe lesions expose the carotid artery. Without agreed criteria, one centre operates on a lesion another would observe, and outcomes cannot be compared. The LDW system fixes a vocabulary: how far the necrosis extends, which critical structures it involves, and how severe the symptoms are [1][3].
The surgical contribution addresses the hardest part: covering a defect deep in the skull base. Free flaps are the reliable option, but reaching the recipient vessels endoscopically through the neck avoids the morbidity of open approaches. The team's trans-submandibular route is an attempt to make that possible entirely through the nose and a small neck incision [1][2].
What a new technique does not yet have
The system has been adopted locally and presented internationally, and the grading has been used to triage real cases, including one presenting twenty years after radiotherapy [3][4].
The sources describe a care pathway and individual cases, not a controlled comparison of flap repair against conservative management, and no flap survival or complication rates are given in the material reviewed. Salvage surgery in previously irradiated tissue has intrinsically high failure rates, and patient selection drives results. The grading system's inter-rater reliability and its validation in other centres are not reported. Because the complication is uncommon, multicentre registries are the realistic route to evidence [2][5].
The condition in context: nasopharyngeal carcinoma
It is unusually concentrated geographically, which is why the expertise sits in southern China.
| Region | What the data shows | Source |
|---|---|---|
| Incidence | About 3–5 per 100,000 in China, over 40% of global cases, with 80% of Chinese cases in the south [5]. | SYSU Third ENT [5] |
| Case volume | About 65,000 new Chinese cases a year [5]. | SYSU Third ENT [5] |
| Necrosis risk | 2-10% after combined therapy, with risk of carotid blowout [5]. | SYSU Third ENT [5] |
Because survival after nasopharyngeal carcinoma is now good, late complications like this increasingly determine quality of life and cause of death [1][5].
Why it matters
| Potential | What the report suggests | Source |
|---|---|---|
| Standardisation | A shared severity language where none existed [1][3]. | [1][3] |
| Reconstruction | An endoscopic route to free-flap repair [1][2]. | [1][2] |
| Caution | Case-series evidence; no outcome rates published [4]. | [4] |
Availability and limits
- This is an editorial summary of hospital and conference reporting, not a treatment recommendation [1][2].
- No comparative outcome data on flap repair [4].
- Inter-rater reliability of the grading is not reported [3].
- Requires a skull base multidisciplinary team [3].
- Carotid involvement demands urgent neurointerventional backup [3].
What to ask before booking
| Question | Why it matters |
|---|---|
| How severe is my necrosis on the LDW system? | Stage determines whether surgery is needed [1]. |
| Has carotid involvement been excluded on imaging? | Blowout risk is the lethal complication [3]. |
| Which department handles foreign patients, and in what language? | The hospital is a working hospital we do not book; confirm international-department coordination and language support. |
| What is the plan if a flap fails? | Salvage in irradiated tissue is difficult [2]. |
Questions patients ask
What was developed?
The LDW grading system for nasopharyngeal skull base necrosis, plus a full care pathway from early identification through endoscopic debridement, free-flap reconstruction and rehabilitation [1][3].
Why does grading matter?
Without agreed criteria, severity assessment varies between centres and outcomes cannot be compared; the LDW system standardises extent, critical-structure involvement and symptoms [1][3].
What is the surgical innovation?
A fully endoscopic trans-submandibular anterior masseteric approach for free forearm flap repair, reported as the first such case internationally [1][2].
How common is the complication?
About 2–10% of patients after combined treatment [5].
Is this relevant to international patients?
It is useful context for China's skull base surgery. The hospital is a working hospital we do not book — contact its international department directly [1].