Tumores Partes Moles Malignos Flashcards
Como se apresenta os sarcomas de partes moles na ressonancia magnetica?
Soft tissue sarcomas generally demonstrate low signal intensity on T1-weighted images and high signal intensity on T2-weighted images.
Como é a caracteristica de crescimento dos tumores de partes moles?
The mass typically is not invasive and grows in a cen- tripetal fashion, pushing normal anatomical structures away.
Metastases de qual origem primária as TC de abdome e pelve identificam?
Abdominal and pelvic CT scans are useful to detect retroperitoneal metastases in patients with myxoid liposarcomas and lymphatic spread in such lesions as synovial sarcoma, epithelioid sarcoma, and rhabdomyosarcoma.
Qual o tumor de partes moles benigno mais comum?
Lipomas are probably the most common benign tumors of connective tissue.
Em qual genero e idade está a maior incidencia de lipomas?
More common in middle-aged women.
Como se chama o lipoma que invade a sinovia?
Lipoma arborecente
Qual é a localização dos angiolipomas?
Angiomyolipoma is a type of lipoma usually found in the kidney. It is composed of smooth muscle, blood vessels, and fat.
Onde ocorrem os mielolipomas?
A fatty tumor known as myelolipoma, containing bone marrow elements, may occur within the adrenal medulla.
Como se trata os lipomas?
Ressecção marginal ou observação
Como se apresenta clinicamente o paciente portador de schwanoma?
Patients may report a painless mass but sometimes complain of referred pain in the distribution of the involved nerve. A Tinel sign can be present on physical examination.
Como avaliar a RNM de um paciente com tumor em nervo periferico?
The nerve may be visualized entering and exiting the mass on the coronal or sagittal MRI sequences. A “split fat sign” refers to a rim of fat that may be observed specifically on the T1-weighted MR image of schwannomas.
Quais são os 2 tipos de tecidos encontrados nos schwanomas?
the tumor consists of two types of tissue: Antoni A and Antoni B. Antoni A tissue is more typical of the tumor and consists of compact collections of spindle cells that show marked palisading. Antoni B tissue is myxomatous and degenerative, and within it are cystic spaces and oten thick-walled blood vessels.
O que são os corpúsculos de Verocay?
Verocay bodies are characteristically found in schwannomas and consist of an arrangement of two rows of palisading nuclei separated by fibrillary material.
Como tratar os schwanomas?
Often the lesion simply spreads the nerve fibers apart without anatomical or functional interruption, allowing the tumor to be removed by careful blunt dissection ater a longitudinal incision in the perineurium.
Qual tipo de tecido o neurofibroma produz mais que o schwanoma?
Neurofibroma is characterized by a much greater production of collagen than is neurilemmoma, and it, too, may occur as an isolated lesion.
O que é a Doença von Recklinghausen?
Neuroibromas also occur as a manifestation of von Recklinghausen disease (neurofibromatosis type 1), in which many such tumors may be found associated with café-au-lait spots and various other lesions.
Qual gene a maioria dos portadores de neurofibroma não expressa?
do not have the NF1 marker (gene located at chromosome 17q11.2)
Qual a caracteristica do neurofibroma plexiforme?
Sometimes a neuroibroma occurs in which multiple fascicles of a peripheral nerve are involved; this is referred to as a “plexiform neurofibroma,” and excising it completely may be impossible without sacrificing the nerve and its associated function.
Qual a caracteristica da condromatose sinovial?
Synovial chondromatosis is a monarticular synovial proliferative disease in which cartilaginous or osteocartilaginous metaplasia occurs within the synovial membrane of joints, bursae, or tendon sheaths.
Quais são as 3 fases da condromatose sinovial?
The disease has been classiied into three phases: (1) early, with synovial chondrometaplasia but no loose bodies; (2) transitional, with active synovial disease and loose bodies; and (3) late, with loose bodies but no synovial disease.
Quais são as articulações mais envolvidas no condromatose sinovial?
Most common in the knee and hip
Qual é o tratamento para a condromatose sinovial?
Treatment consists of arthroscopic or open synovectomy and removal of the loose bodies
Como é apresentação clinica do TGC de bainha de tendão?
It first appears as a slowly enlarging but painless mass. Occasionally, a radiograph shows bony erosion of adjacent cortices.
Como tratar o TGC de bainha de tendões?
Treatment is by marginal excision, which may prove technically dificult in larger lesions. Recurrences are frequent if the excision is incomplete.
Quais são as formas de apresentação da sinovite vilonodular pigmentada?
Pigmented villonodular synovitis may occur in a localized or difuse form. The localized form is identical histologically to giant cell tumor of tendon sheath. The difuse form also appears to be identical histologically to the localized form, but it involves the entire synovium.
Quais são os locais de acometimento mais comum da sinovite vilonodular pigmentar difusa?
The difuse form most commonly afects the knee, but the hip, ankle, shoulder, wrist, and other joints can be involved.
Qual a caracteristica do liquido articular puncionado em um paciente com sinovite vilonodular pigmentar?
Aspiration of the joint characteristically reveals serosanguineous or blood-tinged fluid.
Como se apresenta a sinovite vilonodular pigmentar na RNM?
MRI frequently is diagnostic, showing intraarticular masses that are dark on the T1-weighted and T2-weighted images.
Quais são as medidas terapeuticas para os pacientes portadores de sinovite vilonodular pigmentar?
Recommended treatment for the localized form is marginal excision and for the difuse form is total synovectomy.
Como é a apresentação clínica do hemangioendotelioma benigno?
the type of hemangioma composed of cellular masses of closely packed endothelial cells with many mitotic figures often is called a “strawberry hemangioma” or a “benign hemangioendothelioma.” It is found at birth or shortly there-after, is deep red, and may grow rapidly during the first few months of life. This type usually stops growing, however, and, in most instances, eventually disappears. Only occasionally does one require surgery.
Como é a apresentação clinica dos hemangiomas intramusculares?
Intramuscular hemangiomas can be painful. The pain often is associated with the increased blood low that occurs during increased activity or when the limb is in a dependent position.
Qual a caracteristica dos hemangiomas na RNM?
Hemangiomas characteristically have increased fat content as may be shown on MRI.
Quais são as opções terapeuticas para os hemangiomas intramusculares?
Some intramuscular hemangiomas are infiltrative and extremely difficult to resect except by radical surgery. In these cases, treatment options include embolization or injection with sclerosing agents.
Como se apresenta os tumores glomicos?
Glomus tumor, or glomangioma, is a rare but painful lesion. The skin and subcutaneous tissue of the hands and feet usually are afected, but a tumor may develop in any location in which a glomus body is found. A glomus body serves to control blood low and temperature through the autonomic control of the smooth muscle of the arterial wall. The subungual area of the fingers is a characteristic site of involvement, especially in women. Exquisite point tenderness and hyper- sensitivity is invariably present. Multiple lesions are more common in men.
