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Results 301 - 350 of 885
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Takahashi Tomoko - - 2005
A 25-year-old woman presented with a disturbance in the opening of her mouth 5 months before admission. On admission, painful swelling of the right preauricular region was revealed. Computed tomography (CT) demonstrated a soft tissue density mass around the right condylar process of the mandible. Tc-99m hydroxymethylene diphosphonate (HMDP) bone ...
Rinas Allen C - - 2005
BACKGROUND: Dedifferentiated chondrosarcoma is a rare, poorly understood and often fatal sarcoma that usually manifests as a high grade, non-cartilage-producing sarcoma juxtaposed against a low grade chondrosarcoma. A correct diagnosis requires recognition of both components. In the absence of complete resection, rendering a specific diagnosis on small biopsy specimens, such ...
Rose Brian W - - 2005
An osteosarcoma (OSA) involving the right pelvis was diagnosed in a 12-year-old golden retriever 11 years after triple pelvic osteotomy (TPO) surgery. The dog was presented with a 12-week history of nonweight-bearing lameness of the right hind limb. Radiographs demonstrated an aggressive bone lesion of the right ilium with profound ...
Ogilvie Christian M - - 2005
Hibernomas are rare, benign, soft tissue tumors of brown fat. Despite being benign, we have experienced recurrent hibernomas and cases of significant bleeding at our institution. The current literature contains case reports of recurrence, and one large series that describes pathologic variants but contains little clinical data. We could not ...
Yang Shih-Wei - - 2005
Chondroma of the laryngeal cartilage is an uncommon benign cartilaginous neoplasm. The commonest location is the posterior lamina of the cricoid cartilage, followed by the thyroid cartilage. The occurrence of chondroma in the epiglottis is extremely rare. Depending on the size and location of epiglottic chondroma the clinical manifestations are ...
Müller Susanna - - 2005
Mesenchymal chondrosarcoma is a rare, usually highly malignant chondrogenic neoplasm. The diagnosis of mesenchymal chondrosarcoma can be challenging, it nonetheless has important therapeutic and diagnostic implications. Thus, biopsies of mesenchymal chondrosarcomas without conspicuous cartilaginous differentiation cannot be safely distinguished from other small cell mesenchymal neoplasms such as Ewing's sarcoma and ...
Kokubo Y Y Department of Orthopaedics and Rehabilitation Medicine, Faculty of Medicine, Fukui University, Matsuoka, Fukui, - - 2005
A case report of primary osteosarcoma of the spine in an elderly patient. The histopathological features of osteosarcoma vary widely, often leading to diagnostic difficulties particularly when there is little evidence of osteoid formation. The report describes the difficulty in the diagnosis of osteosarcoma of the thoracic vertebra. Department of ...
Hatano Hiroshi - - 2006
Lipomas may contain nonadipose tissue, which can confound the correct imaging diagnosis because features of such neoplasms can mimic findings associated with well-differentiated liposarcomas. Intratumoral nonadipose tissue, such as muscle, cartilage, and fibrous tissue, may be present in lipomas; however, lymphoid hyperplasia in a lipoma is extremely rare. This report ...
Brennan P A - - 2005
Although lipomas are relatively common and found in most anatomical sites, we are not aware of any previous reports of lipomas arising between the two layers of the deep temporal fascia above the zygomatic arch. This is surprising because a fat pad is seen and used during surgery in this ...
Chowdhury Nilotpal - - 2005
Fine needle aspiration cytology plays an important role in the preoperative assessment of soft tissue neoplasms. In a 40-year-old man presenting with a large soft tissue mass in the posterior aspect of thigh a diagnosis of myxoid liposarcoma was suggested on FNAC. Scrape smears of the excised mass showed an ...
Yildirim, Omer Selim
Chondrosarcoma is a tumour rarely seen in the foot. An 18-year-old male patient visited our clinic with the complaints of swelling and pain in his right foot. On plain radiographs, there were lytic areas in the fifth metatarsal and the fourth and fifth fingers of the right foot. Computerized tomography ...
Kajihara Makoto - - 2005
Extraskeletal osteosarcoma is an extremely rare high-grade malignant soft tissue tumor, which accounts for approximately 4% of osteosarcomas and less than 1% of all soft tissue sarcomas. There have been reports describing the scintigraphic findings of this tumor, especially with Tl-201. We report a biopsy-proven case of extraskeletal osteosarcoma in ...
Choudur H N - - 2005
A middle-aged man was being investigated for constipation. Abdominal radiographs incidentally revealed a large, densely calcified, rounded mass within the pelvic cavity. A CT scan was performed followed by surgical excision with a differential diagnosis of calcified hematoma and an enlarged calcified lymph nodal mass. Histopathological investigation revealed a primary ...
Singh Pawan - - 2005
Extraskeletal chondroma is a rare entity. A fairly benign condition, it is usually seen in adults. It presents as an enlarging mass, most commonly in the hand. Local excision is the treatment of choice. We present a case of extraskeletal chondroma of hand in a 12 year male child. Its ...
Taweevisit Mana - - 2005
Myxoid liposarcoma is a malignant soft tissue tumor with a relatively indolent natural history. It commonly occurs in the extremities with extrapulmonary metastatic potential. Round cell liposarcoma, recently, is widely agreed to be the aggressive counterpart of the myxoid liposarcoma, mostly arising in adverse, local recurrence, and metastatic lesions. Metastatic ...
Silistreli Ozlem KarataƟ - - 2005
We present three females (20, 39 and 58 years old) and one male patient (47 years old), admitted to our clinic with 3-20 years history of giant lipomas on periscapular (n = 2), posterior cervical (n = 1) and abdominal areas (n = 1), respectively. The sizes of the tumours ...
Hameetman Liesbeth - - 2005
Distinguishing osteochondroma from low-grade secondary peripheral chondrosarcoma can be difficult. In osteochondroma, growth-signalling pathways are thought to be downregulated through exostosin (EXT) inactivation. A previous pilot study focusing on expression of putative EXT downstream effectors indicated that progression of osteochondroma towards grade I chondrosarcoma was characterised by upregulation of Bcl-2 ...
Soares Rosilene C - - 2005
Osteosarcoma is a malignant mesenchymal tumor whose cancerous cells produce osteoid matrix. It is the most common primary malignant bone tumor, accounting for approximately 20% of the sarcomas, but only 5% of the osteosarcomas occur in the jaws. They present various clinical and histological aspects, as well as variable disease ...
Darling Mark R - - 2005
Lipomas are common neoplasms of fat in the oral cavity. However, the diagnosis may be difficult for lesions exhibiting unusual histological features. This paper documents the first intraoral report of a chondroid lipoma. The differential diagnosis is discussed. It is important for practicing oral pathologists to recognize rare variants to ...
Randall R Lor - - 2005
Cartilaginous lesions of bone are relatively common and cover a large spectrum from latent enchondroma to aggressive dedifferentiated chondrosarcoma. Differentiating among these lesions, particularly benign enchondroma and low-grade chondrosarcoma, can be challenging. Differentiating involves assimilation and interpretation of clinical, radiographic, and histologic criteria. Molecular techniques to assist in distinguishing among ...
Val-Bernal J Fernando - - 2005
Soft-tissue angiomatosis is a rare condition characterized by diffuse proliferation of benign vascular structures, accompanied by mature adipose tissue, which affect a large segment of the body in a contiguous fashion. Most patients present in childhood or adolescence. We report a case of large soft-tissue angiomatosis, located in the left ...
Kosaki N - - 2005
We treated a 26-year-old man with a 19-year history of Ollier's disease. Secondary chondrosarcomas developed metachronously at four separate locations: both femora, left proximal tibia and fibular head. All four lesions were surgically excised, and each specimen was histologically identified as grade 1 or 2 chondrosarcoma. Clinical follow-up for 20 ...
Yildirim OmerSelim, Celik Hakan, ...
Chondrosarcoma is a tumour rarely seen in the foot. An 18-year-old male patient visited our clinic with the complaints of swelling and pain in his right foot. On plain radiographs, there were lytic areas in the fifth metatarsal and the fourth and fifth fingers of the right foot. Computerized tomography ...
Fukunaga Masaharu - - 2005
A case of low-grade central osteosarcoma of the skull in a 36-year-old male is described. A 10cm mass of the left temporo-occipital bone, which was incidentally found 6 years previously on the occasion of a head trauma, was osteolytic and osteoplastic, affecting soft tissues and the subdural space. The patient ...
Takanami Iwao - - 2005
We report a case of dedifferentiated liposarcoma of the pleura in a 59-year-old man who presented with pain in the right chest wall, 3 years after a routine chest X-ray showed a large tumorous mass. The resected tumor was composed of three distinct histological features: well-differentiated liposarcoma with low-grade leiomyosarcomatous ...
Sheff Jordan S - - 2005
An extraskeletal osteochondroma is an infrequently encountered benign cartilaginous tumor with a predilection for the hands and feet that usually does not exceed 3 cm in diameter. This diagnosis can be misleading because it bears the same name as the osseous neoplasm more commonly referred to as an exostosis. The ...
Zissin Rivka - - 2004
We present a young woman who was hospitalized for abdominal pain and vomiting. Abdominal CT revealed diagnostic features of ileoileal intussusception with a central hypodense lesion of fat density suggestive of a lipoma as the lead point. This diagnosis was confirmed at surgery, where a small bowel resection was performed ...
Mrad K - - 2004
BACKGROUND: Primary malignant mesenchymoma of the bone is a rare neoplasm consisting of two or more unrelated malignant mesenchymal components. The literature reports fewer than 20 cases, most of which were composed of osteosarcoma and liposarcoma. OBSERVATION: We report an exceedingly rare case of primary malignant mesenchymoma of bone composed ...
Amalourde A - - 2004
Although all types of tumour and tumour-like conditions have been described to occur in the clavicle, they only contribute to less then 0.5% of all skeletal tumours. The incidence of primary chondrosarcoma of the clavicle is extremely rare. To our knowledge it has not been reported in Malaysia. We would ...
Inampudi Prasuna - - 2004
PURPOSE: To retrospectively determine the accuracy of sonography in helping to distinguish soft-tissue lipomas from other soft-tissue masses by using histologic proof as the reference standard. MATERIALS AND METHODS: Institutional review board approval was obtained, and informed consent was waived. Thirty-nine patients who underwent sonographic evaluation of a soft-tissue mass ...
Jambhekar Nirmala A - - 2004
A total of 23 cases of mesenchymal chondrosarcoma were studied from the histopathology records spanning 23 years. There were 16 men and 7 women afflicted with this tumor and their mean age was 28.1 years. The radiological features, histology and treatment outcomes have been studied. Osseous and extra-osseous mesenchymal chondrosarcomas ...
Lanng C - - 2004
Lipoma of the breast often causes diagnostic and therapeutic uncertainty. Clinically it may be difficult to distinguish a lipoma from other conditions. Fine-needle aspiration cytology (FNAC) is often not helpful. Both mammography and ultrasound scanning are often negative. For the present study, 108 women with a clinical diagnosis of lipoma ...
Al-Maghrabi Jaudah A - - 2004
Pure lipoma of the uterus is a rare entity and few cases have been reported. They usually develop in postmenopausal women. Clinical symptoms and physical signs are similar to those found in leiomyomas. The histogenesis of these lesions is still unclear. The diagnosis is easily made at the time of ...
Persichetti Paolo - - 2004
Pleomorphic lipomas are rare benign tumours that can resemble a variety of malignant tissue tumour on histological examination. We describe a case of pleomorphic lipoma arising on the posterior aspect of the neck of a 70-year-old man, successfully treated by surgical excision. A review of the literature is presented, summarizing ...
Murphey Mark D - - 2004
Benign lipomatous lesions involving soft tissue are common musculoskeletal masses that are classified into nine distinct diagnoses: lipoma, lipomatosis, lipomatosis of nerve, lipoblastoma or lipoblastomatosis, angiolipoma, myolipoma of soft tissue, chondroid lipoma, spindle cell lipoma and pleomorphic lipoma, and hibernoma. Soft-tissue lipoma accounts for almost 50% of all soft-tissue tumors. ...
Chow Louis T C - - 2004
Malignant mesenchymoma, defined by Stout as sarcomas comprising two or more unrelated differentiated tissue elements other than a fibrosarcoma component, is rare. We report a case of primary malignant mesenchymoma of the proximal fibula in a 10-year-old female student who presented with pain and swelling of the right knee for ...
Cummings T J - - 2004
OBJECTIVE: To report a case of an extraskeletal myxoid chondrosarcoma (EMC) arising from the jugular foramen. EMCs are tumors usually seen in the deep soft tissues of the extremities and are rarely seen within the intracranial cavity. The histological differential diagnosis includes chordoma, conventional chondrosarcoma and chordoid meningioma, among others. ...
Martínez Villén G - - 2004
Enchondromatosis of the hand in the context of the Oilier disease is an infrequent pathologie associated with a high rate of malignancy. In this work, we present a case with multiple enchondromas affecting mainly the fourth and fifth rays of the hand, and with multiple ipsilateral lesions in the foot, ...
Jambhekar Nirmala A - - 2004
Reactive periostitis of the hand can be a confounding lesion on both radiological and histological grounds. An erroneous diagnosis of a malignant tumor, particularly an osteosarcoma, is a possibility. Two cases of florid reactive periostitis of the hand mistaken for osteosarcoma are reported here to illustrate this entity and caution ...
Lim B J - - 2004
We experienced a case of primary malignant mixed müllerian tumors (MMMTs) of the fallopian tube of FIGO stage I. In addition to endometrioid adenocarcinomas, multiple apparent heterologous elements encompassing myxoid chondrosarcoma, osteosarcoma, myxoid liposarcoma, and well-differentiated angiosarcoma were recognized separately in each nodule. Those findings that divergent sarcomatoid differentiations are ...
Shafique Qureshi Sajid - - 2004
Osteosarcoma is a malignancy whose various sites of metastasis greatly modify its ultimate prognosis. We report a case of simultaneous pulmonary and cardiac metastases in a 41-year-old male patient with osteosarcoma of the tibia, presenting after more then one year of completion of adjuvant therapy with progressive dyspnea and cyanosis. ...
Kodama Ken - - 2004
A 17-year-old female underwent metastasectomy of three synchronous lesions in the bilateral lungs under the diagnosis of metastatic osteosarcoma, however, one of them was found to be atypical adenomatous hyperplasia (AAH). Since AAH is very rare among young people, a careful evaluation of high-resolution computed tomographic image is important in ...
Nguyen Vu - - 2004
The wrist is a complex structure with an extensive differential diagnosis for a presenting mass. However, the vast majority of hand and wrist masses are benign, and many of these have a distinctive radiographic appearance. In this article, the imaging characteristics of the most common entities are reviewed with particular ...
Tan M S - - 2004
This article highlights 2 contrasting lesions of the floor of the mouth, the first being a benign lipoma growth and the latter, an adenoid cystic carcinoma. Both of these lesions appear clinically similar, presenting as a swelling with normal overlying mucosa and otherwise asymptomatic at the time of clinical examination. ...
Ferguson Peter C - - 2004
In a patient who presented with an osteosarcoma of the proximal humerus, systemic staging revealed a lesion in the contralateral humerus, which was shown to be an enchondroma after open biopsy. The patient had a local recurrence develop, which necessitated forequarter amputation. Shortly thereafter, the patient had pain develop at ...
Spallone Aldo - - 2004
BACKGROUND: Intracranial lipomas are rare lesions, representing 0.02% of operated intracranial lesions. Lipomas of the pineal region are even rarer and are reported occasionally in the literature. This is possibly because of the fact that they may give rise to clinical symptoms rather infrequently. When they become symptomatic, some form ...
Hatano Hiroshi - - 2005
Extraskeletal osteosarcoma is a rare malignancy, which accounts for 1-2% of all soft tissue sarcomas; occurrence of these tumors in the head and neck is extremely rare. We present a case of extraskeletal osteosarcoma arising in the subcutaneous tissue of the jaw angle, the central portion of which displayed calcification. ...
Müller P E - - 2004
Malignant transformation of solitary enchondromas of the hand to secondary chondrosarcomas is extremely rare. We report a case of a recurrent chondromatous tumor of the hand that initially presented with the typical histology of a cellular enchondroma of the small tubular bones but with clinical and radiological signs of malignancy. ...
Murphy C G - - 2004
Retroperitoneal liposarcoma is a rare tumour that often presents late due to its indolent nature and large potential growing space. Total resection is the aim, including adjacent organs if necessary. Recurrence is common, and 5-year disease-free interval is not regarded as a cure. We present a case of a 57 ...
Basoglu Ahmet - - 2004
Benign neoplasms of the endobronchial tree are uncommon, and among them lipomas are the most uncommon. Endobronchial lipoma is histologically benign in character but may cause bronchial obstruction. We describe a 47-year-old woman with an endobronchial lipoma arising from the right main bronchus which was treated as asthma for 4 ...
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