Odontogenic fibroma (OF) is considered an unusual, benign mesenchymal neoplasm and one of the most little-understood lesions amongst all odontogenic neoplasms. The incidence rate of the tumor is from 0% to 5.5%. WHO classified them into intraosseous or central and extraosseous or peripheral variants. It chiefly consists of fibroblastic tissue with an inconsistent amount of inactive appearing od...

Introduction: Leiomyoma are benign mesenchymal tumors presenting as the most common uterine neoplasm. Atypical leiomyoma (ALM), a nomenclature given in WHO classification, is a leiomyoma variant showing histopathological features ranging between a benign leiomyoma and leiomyosarcoma (LMS). It is a rare smooth muscle neoplasm detected mostly on histological examination in myomectomy and hysterec...

Synovial sarcoma (SS) is a malignant mesenchymal neoplasm usually involving the lower limbs of young adults. Localization in head-neck district is rare. Histologically, these are characterised by a biphasic or monophasic variant, the latter being more rare and difficult to identify. Immunohistochemistry plays a crucial role in the diagnosis. Cytogenetics also play an important role since both t...

Solitary fibrous tumor (SFT) is a mesenchymal neoplasm that appears primarily in the pleura and rarely in intrapulmonary or endobronchial topography. The authors report the case of a 47-year-old woman who presented obstructive respiratory symptoms for 4 years. The chest computed tomography and bronchoscopy showed an obstructive polypoid lesion located between the trachea and the left main bronc...

Abstract A newly described entity called “calcified chondroid mesenchymal neoplasms” includes neoplasms with variable amounts of calcification and FN1 fusions [Liu et al, Mod Pathol 2021]. We report a case left temporal bone giant cell granuloma-like lesion that also shows an FN1-TEK fusion. Close monitoring MRI images after surgery has showed no recurrence. Case report: 33-year-old male develo...

Introduction: Solitary fibrous tumor is a rare, mesenchymal neoplasm that has been reported in numerous sites. Occurrence in the parotid gland is exceedingly rare.   Case Report: A 53-year-old man with a 2 cm solitary fibrous tumor of the left parotid gland, that was observed clinically and operatively and thought to be a neoplasm arising from Stensen's duct, is described. A pre-operative CT sc...

The article deals with the physiology of endometrial regeneration after its desquamation phase during menstrual cycle in women, as well an overview studies mesenchymal/stem cells main source tissue regeneration. processes that take place first their physiological essence are repair and regeneration, contrast to proliferation, which is based on regenerative neoplasm tissues, can be observed vari...

This case series describes three unreported cases of an uncommon benign neoplasm named Abrikossoff’s tumour or granular cell tumour (GCT). This mesenchymal neoplasm apparently arises from neural or Schwann cell origin with benign and malignant forms. All cases presented here were unique nodules on oral mucosa, coming out from the connective tissue, and occurring in women with age ranging from 3...

Solitary fibrous tumor (SFT) is a neoplasm typically arising in the pleura. Yet, extrapleural cases have been described and are a common cause of diagnostic pitfalls, especially when met in unusual sites. We report the clinical and pathological features of a case of SFT arising in a rather unusual site, the urinary bladder, the seventh reported to date in the English literature and the first wi...