Observation: Collagenous fibroma (desmoplastic fibroblastoma) is a rare and benign soft tisue tumor, affecting mainly men in their 5th through 7th decades. These lesions are well-circumscribed, slow-growing, firm, and painless masses of 1-15 cm diameter with oval, fusiform or disc shape. The tumor consists of hypocellular proliferation of the spindle to stellate-shaped mesenchymal cells, embedd...

Desmoplastic ameloblastoma is an unusual type of ameloblastoma with special histologic and radiographic features and anatomic distribution which differs from those in the classic type of ameloblastoma. The purpose of this article is to assist the dental community in better understanding of this variation of odontogenic tumor. We present a patient with desmoplastic and conventional variant of am...

An elderly female patient presented to the clinic with a several-week history of a mass in her left upper arm that was tender to the touch. The mass was initially thought to be a schwannoma of the left radial nerve based on imaging and was surgically removed. The pathology report revealed an uncommon diagnosis of desmoplastic fibroblastoma.

Desmoplastic ameloblastoma (DA) is a relatively rare histological variant of ameloblastoma with specific clinical, radiological, and histological features. This tumor is more commonly seen in the anterior region of jaws as a mixed radiopaque-radiolucent lesion resembling benign fibro-osseous lesions. Histologically, DA is characterized by small nests and strands of "compressed" odontogenic epit...