Incisional and Excisional Biopsy


An incisional biopsy was performed in September 2005; purulent exudate was noted at the time of the biopsy.  The histologic examination of the incisional biopsy revealed a cystic structure lined by thin and corrugated epithelium (Fig 3) and supported by a thin fibrous connective tissue wall.  The latter was focally inflamed.   The epithelium was keratinized and had a palisaded basal cell layer (Fig 4). 

 

Figure 3. Low power (x100) histology shows a cystic structure lined by a uniformly thin lining epithelium which is supported by a fibrous connective tissue wall.   The lining epithelium is corrugated and keratinized. 

 

Figure 4. Higher power (x200) histology shows a cystic structure with palisaded basal cell layer.