Usefulness and pitfall of Narrow band imaging combined with magnifying endoscopy for detecting an unknown head and neck primary site with cervical lymph node metastasis

Successful detection of a minute tonsillar cancer lesion on transoral examination with narrow band imaging: A report of 2 cases

“…Primary site detection with less invasive methods is preferred. As Masaki et al and Shinozaki et al reported, NBI could successfully be used to detect unknown primary sites in the head and neck. They used transoral gastrointestinal endoscopy for examination and detected several primary sites in the palatine tonsils.…”

Role of narrow‐band imaging in detection of head and neck unknown primary squamous cell carcinoma

“…In fact, this has a significant influence on NBI perceived diagnostic potential, thus leading to the heterogeneous results of previous studies. Some authors included into the analysis patients who had been previously evaluated by WL endoscopy and cross‐sectional imaging (CT), without performing a PET scan prior to NBI evaluation. In this setting, the NBI detection rate was 13.3%, 34.8%, 47.2%, and 54.5%, respectively (according to each different study) .…”

“…Some authors included into the analysis patients who had been previously evaluated by WL endoscopy and cross‐sectional imaging (CT), without performing a PET scan prior to NBI evaluation. In this setting, the NBI detection rate was 13.3%, 34.8%, 47.2%, and 54.5%, respectively (according to each different study) . Interestingly, most tumors were described as small and superficial, underlying the prominent role of NBI in detection of SCCs that had been previously missed by imaging and WL endoscopy due to their limited extension.…”

Current Approaches to Primary Unknown Neck Metastases

“…Tonsil SCC'nun kontralateral metastaz oranı nedeni ile bilateral tonsillektomi yapılmasını öneren literatür bilgisi mevcuttur (9,14). Dar bant görüntüleme primer lezyonu saptamada yararlı olabilmektedir (15,16). PET-BT'ye ilave olarak yapılan dar bant görüntülemenin primer lezyonu saptamada daha etkin olduğu bildirilmiştir (15,16).…”

“…Dar bant görüntüleme primer lezyonu saptamada yararlı olabilmektedir (15,16). PET-BT'ye ilave olarak yapılan dar bant görüntülemenin primer lezyonu saptamada daha etkin olduğu bildirilmiştir (15,16). Transservikal ultrasonografi (USG) ile dil kökü ve palatin tonsillerde primer lezyonun saptandığını bildiren yayınlar mevcuttur.…”