Histopathology Report

Final reports of sinonasal specimens should include details on:

- the specimen type and side.

- if fragmented, the number of fragments and the size of the largest.

- the type, subtype and grade of tumour present:

- sinonasal papilloma variants.

- squamous cell carcinoma and variants.

- low-grade adenocarcinoma.

- intestinal-type adenocarcinoma.

- lymphoma.

- the macroscopic size of tumour.

- the presence or absence of invasion of bone.

- the distance of tumour from the nearest margin.

- the presence or absence of vascular invasion.

- the presence or absence of dural invasion (if craniofacial resection).

- other pathology such as radiation injury.

• TNM: classification of tumour spread Maxillary sinus

- pT2 bone erosion/destruction, hard palate, middle nasal meatus.

- pT3 posterior bony wall maxillary sinus, subcutaneous tissues, floor/medial wall of orbit, pterygoid fossa, ethmoid sinus.

- pT4a anterior orbit, cheek skin, pterygoid plates, infratemporal fossa, cribriform plate, sphenoid/frontal sinus.

- pT4b orbital apex, dura, brain, middle cranial fossa, cranial nerves other than V2, nasopharynx, clivus.

Nasal cavity and ethmoid sinus

- pT1 one subsite.

- pT2 two subsites or adjacent nasoethmoidal site.

- pT3 medial wall/floor orbit, maxillary sinus, palate, cribriform plate.

- pT4a anterior orbit, skin of nose/cheek, anterior cranial fossa (minimal), infratemporal fossa, pterygoid plates, sphenoid/frontal sinus.

- pT4b orbital apex, dura, brain, middle cranial fossa, cranial nerves other than V2, nasopharynx, clivus.

All sites: regional lymph nodes pN0 no regional node metastasis.

pN1 metastasis in a ipsilateral single < 3 cm.

pN2 metastasis in:

a. ipsilateral single >3 to 6 cm.

b. ipsilateral multiple < 6 cm.

c. bilateral contralateral < 6 cm. pN3 metastasis in a lymph node > 6 cm.

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