ICD-9-CM Volume 2 Index entries containing back-references to 
180.9:
- Carcinoma (M8010/3) - see also Neoplasm, by site, malignant squamous (cell) (M8070/3) squamous (cell) (M8070/3)  adenoid type (M8075/3) adenoid type (M8075/3)
  and adenocarcinoma, mixed (M8560/3) and adenocarcinoma, mixed (M8560/3)
  intraepidermal, Bowen's type - see Neoplasm, skin, in situ intraepidermal, Bowen's type - see Neoplasm, skin, in situ
  keratinizing type (large cell) (M8071/3) keratinizing type (large cell) (M8071/3)
  large cell, nonkeratinizing type (M8072/3) large cell, nonkeratinizing type (M8072/3)
  microinvasive (M8076/3) microinvasive (M8076/3)   specified site - see Neoplasm, by site, malignant specified site - see Neoplasm, by site, malignant
   unspecified site 180.9 unspecified site 180.9
 
  nonkeratinizing type (M8072/3) nonkeratinizing type (M8072/3)
  papillary (M8052/3) papillary (M8052/3)
  pseudoglandular (M8075/3) pseudoglandular (M8075/3)
  small cell, nonkeratinizing type (M8073/3) small cell, nonkeratinizing type (M8073/3)
  spindle cell type (M8074/3) spindle cell type (M8074/3)
  verrucous (M8051/3) verrucous (M8051/3)