Incisional and excisional biopsy

The histology was diagnosed by Dr. Laura Finn, Seattle Children’s Hospital; Department of Pathology.  The histologic evaluation revealed a cyst-like structure lined by granulation tissue (Fig 3) and filled with mucoid material and foamy macrophages (Fig 4).  This structure was focally lined by skeletal muscle bundles and minor salivary gland tissue exhibiting focal fibrosis and chronic inflammation.

Figure 3.Low power (x100) histology shows a cyst-like structure lined by granulation tissue and filled with mucoid material and foamy macrophages.  The lesion was focally surrounded by skeletal muscle bundles.

 

Figure 4. High power (x200) histology shows closer look of the cyst-like structure with the granulation tissue rim and lumen filled with mucoid material and foamy macrophages.