Changes

[[Image:cowpap1.gif|right|thumb|100px|<small><center>Papilloma and Squamous Cell Carninoma of Epiglottis (Courtesy of Alun Williams (RVC))</center></small>]]

[[Image:cowpap1.gif|right|thumb|100px|<small><center>Papilloma and Squamous Cell Carninoma of Epiglottis (Courtesy of Alun Williams (RVC))</center></small>]]

*Squamous cell carcinomas are the malignant equivalent of the papilloma and may arise anywhere within the [[Oral Cavity - Oropharynx - Anatomy & Physiology|oropharynx]].

*Squamous cell carcinomas are the malignant equivalent of the papilloma and may arise anywhere within the [[Oropharynx - Anatomy & Physiology|oropharynx]].

**Those arising over the tonsil (squamous carcinoma of the tonsil or tonsillar carcinoma) are '''very malignant''', invading adjacent tissues and metastasising early.  

**Those arising over the tonsil (squamous carcinoma of the tonsil or tonsillar carcinoma) are '''very malignant''', invading adjacent tissues and metastasising early.  

**Squamous carcinomas of the tongue (especially in '''cats''') can also behave in a very malignant fashion. Those at more rostral sites, e.g. on the incisor gingivae, are less likely to metastasise early although they may be locally aggressive.

**Squamous carcinomas of the tongue (especially in '''cats''') can also behave in a very malignant fashion. Those at more rostral sites, e.g. on the incisor gingivae, are less likely to metastasise early although they may be locally aggressive.

**Squamous cell carcinomas of the [[Oral Cavity - Oropharynx - Anatomy & Physiology|oropharynx]] in cattle are commonly seen as part of an [[Upper Alimentary Tract Carcinoma Complex|upper alimentary tract carcinoma complex]].

**Squamous cell carcinomas of the [[Oropharynx - Anatomy & Physiology|oropharynx]] in cattle are commonly seen as part of an [[Upper Alimentary Tract Carcinoma Complex|upper alimentary tract carcinoma complex]].

* Squamous cell carcinoma is thought to develop from papillomas in cattle in association with ingested carcinogens in bracken fern.

* Squamous cell carcinoma is thought to develop from papillomas in cattle in association with ingested carcinogens in bracken fern.