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Ophthalmic Tumours
Carcinoma of Conjunctiva (ICD‐O‐3 C 69.0) Rules for Classification There should be histological confirmation of the disease and division of cases by histological type, for example, mucoepidermoid and squamous cell carcinoma. The following are the procedures for assessing T, N, and M categories: T categories Physical examination N categories Physical examination M categories Physical examination and imaging
Regional Lymph Nodes The regional lymph nodes are the preauricular, submandibular and cervical lymph nodes.
TNM Clinical Classification T – Primary Tumour TX Primary tumour cannot be assessed T0 No evidence of primary tumour Tis Carcinoma in situ T1 Tumour 5 mm or less in greatest dimension invades through the conjuctival basement membrane T2 Tumour more than 5 mm in greatest dimension, invades through the conjuctival basement membrane without invasion of adjacent structures* T3 Tumour invades adjacent structures* T4 Tumour invades the orbit or beyond T4a Tumour invades orbital soft tissues, without bone invasion T4b Tumour invades bone T4c Tumour invades adjacent paranasal sinuses T4d Tumour invades brain