Spectrum of Fibroblastic and Myofibroblastic Tumors When one considers soft tissue tumors in pediatrics, tumors of vascular (29%), neurogenic (15%), and myogenic (striated muscle, 14%) origin occur more often than fibroblastic-myofibroblastic tumors (12%). The spectrum of fibroblastic/myofibroblastic tumors is quite divergent from both clinical and histopathologic viewpoints (Table 1). These tu...

In bronchopulmonary dysplasia (BPD), alveolar septa are thickened with collagen and α-smooth muscle actin-, transforming growth factor (TGF)-β-positive myofibroblasts. We examined the biochemical mechanisms underlying myofibroblastic differentiation, focusing on the role of glycogen synthase kinase-3β (GSK-3β)/β-catenin signaling pathway. In the cytoplasm, β-catenin is phosphorylated on the NH(...

ically benign mass that is characterized by a variably cellular, spindle cell proliferation in a myxoid to collagenous stroma with a prominent inflammatory infiltrate that is primarily composed of plasma cells and lymphocytes, with occasionally admixed eosinophils and neutrophils (1). Inflammatory myofibroblastic tumor most commonly involves the lung and the orbit, but it has been reported to o...

Inf lammatory myof ibroblast ic tumor is an unusual disease that is most commonly seen in the lung and orbit and extremely rare in the mediastinum. As far as we know, there have been only two case reports of mediastinal inf lammatory myofibroblastic tumor occurring in patients over 40 years old. In literature, we found no such case of mediastinal inf lammatory myof ibroblastic tumor that can pr...

BACKGROUND Intussusception is defined as a segment of the gastrointestinal tract and mesentery within the lumen of an adjacent segment. It is a rare condition in adults that can occur anywhere in the gastrointestinal tract from the stomach to the rectum. Only 5% of all intussusceptions are presented in adults, and in 1-5% of all cases of intestinal obstruction. Inflammatory myofibroblastic tumo...

Only two cases of myofibroblastic sarcoma in the liver have been reported in the literature. Here, we report the case of a male patient with high-grade myofibroblastic sarcoma mimicking echinococcosis in the liver. The 25-year-old male patient complained of right upper quadrant swelling pain for one week and was initially diagnosed with echinococcosis. He was then scheduled for an exploratory l...

Inflammatory myofibroblastic tumor is a distinctive lesion composed of myofibroblastic spindle shaped cells accompanied by inflammatory infiltrate that may arise in various organs. It is believed to be a noneoplastic inflammatory condition, although this is still controversial. The recognition of inflammatory myofibroblastic tumor as an entity is important especially to avoid unnecessary surger...

Background and Objective: Inflammatory pseudotumor is a lesion composed of proliferating spindle cells with mixed inflammatory infiltrates. Some authors have proposed the name inflammatory myofibroblastic tumor as a proper descriptive term rather than the vague inflammatory pseudotumor. The aim of this study was to verify the myofibroblastic origin of spindle cells in idiopathic orbital inflamm...

BACKGROUND Myofibroblastic sarcoma or myofibrosarcoma is a malignant tumor of myofibroblasts and known to develop rarely in the breast, but its underlying lesion and tumor cell origin have never been reported yet. CASE PRESENTATION A 61-year-old female presented with a gradually growing breast mass with well-demarcated ovoid nodular shape. The tumor was histologically characterized by fascicu...

BACKGROUND Inflammatory myofibroblastic tumors are rare benign tumors that can mimic malignancy. Their precise aetiology is unknown. They are seen more frequently in childhood and the most common involvement is seen in the lungs. Primary inflammatory myofibroblastic tumors of the gallbladder are rather infrequent. The present knowledge is based on case reports. CASE REPORT A 66 year-old male ...