T1 - < 2 cm
T2 - 2-4 cm
T3 - > 4 cm
T4 (for lip) - Invasion of cortical bone, inferior alveolar nerve, floor of mouth, skin of face
T4a - Invasion of cortical bone, extrinsic muscles of tongue (genioglossus, hyogossus, palatoglossus, styloglossus), maxillary sinus, skin of face
T4b - Invasion of masticator space, pterygoid plate, skull base, encasement of ICA
References:
AJCC Cancer staging handbook. 6th Edition. Springer
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Head and Neck Imaging Notes
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Although I have taken care to make my blog posts as accurately as possible, the blog itself is not replacement for text-books and journals. The blogger does not accept any harm or injury related to the use of the material from this blog. All the images are from my collection and are not copyrighted; hence feel free to use them and I do not want any credit also. The notes are from the quoted journals and text-books, relevant to my practice. If anybody feels I am violating copyright, please let me know. I will delete the relevant data from my blog. I am greatly indebted to the reference book Som PM et al, Head and Neck Imaging. 4th edition. Mosby publications. Unless given the reference, the reference is most likely to this book.
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