No abstract available.
Myofibroblasts* ; Thyroid Gland*

An inflammatory myofibroblastic tumor (IMT) is relatively rare quasineoplastic lesion. An IMT usually presents as a single mass within a single organ or sometimes as multifocal lesions within a single anatomic region. An IMT involving noncontiguous multi-organs within different anatomic regions is extremely rare. We present a case of an aggressive IMT that involved the musculoskeletal system and multiple abdominal visceral organs.
Musculoskeletal System ; Myofibroblasts*

Fibrous pseudotumor of the testicular tunics is uncommon lesion. They typically arise as painless scrotal masses that may be associated with a hydrocele or history of trauma or infection. Two-thirds involve the tunica vaginalis testis, with infrequent involvement of other scrotal structures. Once excised, these lesions behave in a benign fashion. Typically, these masses are multinodular, but in rare cases they are diffuse, band-like myofibroblastic proliferations that encase the testis. We report here on a case of fibrous pseudotumor of the tunica vaginalis in 76 year-old patient. (Korean J Urol 2006;47:1130-1132)
Aged ; Humans ; Myofibroblasts ; Testis

The role of ultrasound (US) is limited in the pathologic diagnosis of soft tissue tumors. It is possible to predict the pathologic results of some common soft tissue tumors with typical US features. We report the US and pathologic findings of three angiolipomas, one nodular hidradenoma, and one benign myofibroblastic tumor, which are uncommon soft tissue tumors with characteristic US findings.
Acrospiroma ; Angiolipoma ; Myofibroblasts

We herein report a case of palmar fibromatosis, who was 78-year-old male and had had multiple variable-sized subcutaneous hard nodules on the left palm for 2 months. Histopathologic findings of the lesion revealed that the nodules were highly cellular, containing numerous spindle shaped cells. Ultrastructurally, intracytoplasmic micrcfilaments were present, and the nuclei were extremely indented by one or more transverse folds. These findings suggested the cells were myofibroblasts.
Aged ; Fibroma* ; Humans ; Male ; Myofibroblasts

Nodular fasciitis is a benign myofibroblastic proliferative lesion of the soft tissue. It appears typically as a rapidly growing painless solitary mass over several weeks' duration. It may be confused with a malignant tumor, especially with a sarcomatous lesion due to its aggressive clinical behavior and histological features. Only 7-20% of theses tumors are located in the head and neck since the retroauricular lesion is extremely rare. We report on a patient with nodular fasciitis as a retroauricular mass with a review of literature.
Fasciitis ; Head ; Humans ; Myofibroblasts ; Neck

No abstract available.
Female ; Humans ; Middle Aged* ; Myofibroblasts

A plexiform fibrohistiocytic tumor is a low-grade malignant mesenchymal neoplasm of myofibroblastic origin, with the capacity for biphasic differentiation toward a fibroblastic or histiocyte-like morphology. We report a case of myxoid plexiform fibrohistiocytic tumor occurring on the left upper arm in a 34-year old man. The lesion was a yellowish-to-pinkish color, rounded, pedunculated tumor with a short pedicle, measuring 1x1x1.5cm. Histopathological examination revealed a multinodular biphasic proliferation of fibroblast- like and histiocyte-like cells with a few osteoclast-like giant cells. This case is notable for the rare myxoid changes. To the best of our knowledge, this is the first report of a plexiform fibrohistiocytic tumor in the Korean dermatological journals.
Adult ; Arm ; Fibroblasts ; Giant Cells ; Humans ; Myofibroblasts

Nodular fasciitis is a reactive myofibroblastic proliferative lesion and is frequently misdiagnosed as a sarcoma. Histopathologically, nodular fasciitis can be grouped into three subtypes based on their relation with the fascia: subcutaneous, fascial, intramuscular. The subcutaneous type is the most common type. Its histological appearance is quite variable, with lesions ranging from highly cellular "pseudosarcomatous" to myxoid proliferations, to hyalinized tumefactions with keloid-like strands of collagen. Herein we report a case of subcutaneous nodular fasciitis showing keloid-like, hylainized, and thickened collagenous change.
Collagen ; Fascia ; Fasciitis* ; Hyalin ; Keloid ; Myofibroblasts ; Sarcoma

Dermatomyofibroma is a recently described, benign acquired plaque-like cutaneous proliferation of fibroblast and myofibroblast. Clinically, it is located in or around the shoulder and measures from 1 to 2 cm in greatest diameter. Histologically, these are non-encapsulated but well-circumscribed, plaque-like lesions located in the reticular dermis, and composed of fascicles of monomorphic myofibroblasts, oriented parallel to the skin surface. We report a 25-year-old man with a 1.5X1.5 cm sized skin colored plaque-like mass on his left shoulder and showed the histologic finding of dermatomyofibroma.
Adult ; Dermis ; Fibroblasts ; Humans ; Myofibroblasts ; Shoulder ; Skin