Intravascular papillary endothelial hyperplasia or Masson's tumor is a rare reactive disease of vascular origin characterized by exuberant proliferation of endothelial cells notably occurring within blood vessels of head, neck, and extremities. The importance of this entity is its ability to mimic a variety of diseases both benign and malignant in the orofacial region. Here, we present a case o...

Intravascular papillary endothelial hyperplasia (IPEH) is a benign endothelial proliferation, usually intravascular, that may mimic angiosarcoma. In this report, four new cases of IPEH involving the oral region are described. The affected sites were the lower lip, labial comissure and the submandibular region. After clinical evaluation, the complete removal of the lesions showed a circumscribed...

Verrucous hyperplasia (VH) is a rare and potentially malignant exophytic oral mucosal lesion with verrucous or papillary surface. VH has tendency to transform into its counterpart, carcinoma, which clinically indistinguishable, yet histologically variable. The most common site of predilection the buccal mucosa more prevalent in patients habits areca nut chewing smoking. A biopsy surrounding nor...

We found a high prevalence of RET expression among our papillary carcinoma at 77% 08 of 53); p< 0.001. Interestingly, the follicular adenomas and nodular hyperplasia cases exhibited a low expression of RET of 18% (9 of 50 cases) and 22.7% 05 of 66) respectively. RET/PTC re-arrangement has been demonstrated in these lesions before 7,8. It has been postulated that these positive follicular cell r...

Primary retroperitoneal tumors are rare, and benign retroperitoneal tumors are exceptionally rare. Herein, we present a very rare case of benign concomitant retroperitoneal intramuscular hemangioma and intravascular papillary endothelial hyperplasia, with the unusual presentation of lumbosacral plexopathy. After surgical treatment and rehabilitation, the patient recovered uneventfully. This cas...

We report the unique association of Masson's pseudoangiosarcoma (endothelial papillary hyperplasia) and extramedullary hematopoiesis. The lesion was present as a violaceous nodule on the side of the tongue of a 78-year-old man with history of multiple myeloma and long-standing mild anemia. This association between a peculiar form of thrombus organization and extramedullary hematopoiesis has bee...

An unusual localization of localized colitis cystica profunda in a 31-year-old man is described. The patient presented as anal bleeding and a protruding mass at the descending colon; the mass was polypoid and was made up of papillary epithelial hyperplasia with downward herniation of glands into the submucosa. Only one similar case involving a descending colon has been reported in the world lit...

Struma ovarii or monodermal teratoma, is a specialized ovarian neoplasm composed entirely of mature thyroid tissue. It is a relatively rare tumor which comprises 1% of all ovarian tumors and 2.7% of all dermoid tumors. Its colour and consistency is like that of a thyroid tissue. The tissue may show any of the pathologic changes seen in a normally placed gland, including diffuse or nodular hyper...