Basal Cell Carcinoma

• growth pattern: nodular/superficial/infiltrative (morphoeic)/micronodular/other.

• differentiation: severely atypical or malignant squamous component present - yes/no.

- lymphatic/vascular invasion: yes/no/uncertain.

- perineural invasion: yes/no/uncertain.

Figure 37.8. Blocking a pilonidal sinus specimen.

• excision margins:

- nearest peripheral: not involved (mm)/involved.

- nearest deep: not involved (mm)/involved.

• extent of local tumour spread (see squamous cell carcinoma).

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