1/24. Intravascular papillary endothelial hyperplasia causing cauda equina compression: case report.OBJECTIVE AND IMPORTANCE: Intravascular papillary endothelial hyperplasia (Masson's vegetant hemangioendothelioma) is a rare condition affecting the neuraxis. In the literature, only one case of this lesion involving the vertebral canal with spinal cord compression has been reported. We present a case of cauda equina compression due to this abnormality. CLINICAL PRESENTATION: A 17-year-old boy was admitted at our hospital with pain, numbness, paresis of the left lower extremity, and bladder dysfunction of approximately 1 month's duration. Computed tomography and magnetic resonance imaging of the spine revealed a tumor within the spinal canal at the T12-L1 level. INTERVENTION: The patient underwent a T12-L1 laminectomy. An epidural red nodular tumor was visualized and totally resected. The findings of the pathological examination were compatible with intravascular papillary endothelial hyperplasia. At follow-up examination 1 month after the operation, the patient had complete resolution of the pain, and the motor deficit and bladder dysfunction had improved significantly. CONCLUSION: This rare benign vascular lesion may be clinically and histopathologically mistaken for an angiosarcoma. Because the intravascular papillary endothelial hyperplasia can be cured by complete surgical resection, it is important to distinguish between these two lesions to avoid inappropriate aggressive treatment.- - - - - - - - - - ranking = 1keywords = hyperplasia (Clic here for more details about this article) |
2/24. Recurrent intravascular papillary endothelial hyperplasia of the toes.We report on the rare case of a 50-year-old male with intravascular papillary endothelial hyperplasia (IPEP) in the left toes. The patient noticed a small tender mass in the left toes and underwent surgery in November 1997. The tumor recurred twice after surgery. Histopathological examination revealed a pure form of IPEP without underlying benign vascular lesions. copyright (R) 2000 S.Karger AG, Basel- - - - - - - - - - ranking = 0.71428571428571keywords = hyperplasia (Clic here for more details about this article) |
3/24. Intravascular papillary endothelial hyperplasia (Masson's tumor) manifesting as a lateral neck mass.Intravascular papillary endothelial hyperplasia is a benign lesion of vascular origin that is caused by an excessive proliferation of endothelial cells in normal blood vessels or vascular malformations. We report the case of a 26-year-old man who had such a lesion deep within the soft tissues of his neck. Imaging studies revealed a 6-cm-diameter mass, with its epicenter in the right retromandibular space. The mass extended into the right parapharyngeal space and compressed the pharynx. The mass was excised, and the patient recovered uneventfully. We discuss the management of this lesion, with emphasis on radiologic and histologic assessment and the differential diagnosis.- - - - - - - - - - ranking = 0.71428571428571keywords = hyperplasia (Clic here for more details about this article) |
4/24. Reactive angioendotheliomatosis secondary to dermal amyloid angiopathy.Reactive angioendotheliomatosis (RAE) is a rare benign cutaneous vascular proliferation characterized by intravascular hyperplasia of endothelial cells and tuft-like proliferation of vessels. A 75-year-old man had erythematous and violaceous macules, some stellate and others arranged in a livedoid pattern, evolving toward necrosis with central areas having an "atrophie blanche" appearance spread on the trunk, inguinal folds, and right thigh. He was on hemodialysis and had a benign monoclonal gammopathy. Cutaneous biopsy revealed RAE characterized by the proliferation of epithelioid and spindle-shaped cells in superficial and middermis lining vascular channels, arranged in clusters, and sometimes displaying an intravascular growth pattern. These cells stained for CD31, CD34, and actin. Interestingly, prominent amyloid deposits were found in the wall of some vessels in deep dermis, often causing obstruction of their lumina. The cause of RAE is unknown, but it can be associated with infections, antiphospholipid syndrome, dysglobulinemia, cryoproteinemia, and lower extremities arteritis, and it may occur near arteriovenous fistulas. In this patient, we believe that RAE was caused by obliteration of dermal vessels by amyloid deposits. Indeed, it is thought that RAE could be caused by ischemia secondary to vascular obstruction. This is the first reported patient with RAE associated with amyloid deposits.- - - - - - - - - - ranking = 0.14285714285714keywords = hyperplasia (Clic here for more details about this article) |
5/24. Masson's pseudoangiosarcoma, alias intravascular papillary endothelial hyperplasia, in dissecting aortic aneurysm caused by cystic medionecrosis.This report describes a 25-year-old man who died due to extensive cystic medionecrosis of the aortic wall complicated by both an acute and an ancient dissection. The very unusual finding of an intravascular papillary endothelial hyperplasia, also known as Masson's pseudoangiosarcoma, in the dissected wall is reported given its resemblance to a hemangiosarcoma.- - - - - - - - - - ranking = 0.71428571428571keywords = hyperplasia (Clic here for more details about this article) |
6/24. Intravascular papillary endothelial hyperplasia of the lung.Intravascular papillary endothelial hyperplasia (IPEH) is a benign vascular endothelial proliferation, which is usually confined to the lumen of preexisting vessels or vascular malformation. IPEH usually presents as a single lesion, and it rarely involves the lung. We describe a rare case of intrapulmonary IPEH presented by multiple variably sized, well-defined nodules occurring in a 52-year-old woman.- - - - - - - - - - ranking = 0.71428571428571keywords = hyperplasia (Clic here for more details about this article) |
7/24. Intravascular papillary endothelial hyperplasia in the hand of a fencer.A case of intravascular papillary endothelial hyperplasia in the hypothenar eminence of a 23-year-old female fencer is described. Differential diagnosis with other similar benign and malignant lesions was made using histopathology and immunohistochemistry. The possible post-traumatic proliferative histogenesis is discussed. The non-malignant nature of the mass was confirmed after a three year follow-up.- - - - - - - - - - ranking = 0.71428571428571keywords = hyperplasia (Clic here for more details about this article) |
8/24. Intravascular papillary endothelial hyperplasia (Masson's hemangioma) of the liver: a new hepatic lesion.Intravascular papillary endothelial hyperplasia (Masson's hemangioma) is a disease characterized by exuberant endothelial proliferation within the lumen of medium-sized veins. In 1923, Masson regarded this disease as a neoplasm inducing endothelial proliferation, however, now it is considered to be a reactive vascular proliferation following traumatic vascular stasis. The lesion has a propensity to occur in the head, neck, fingers, and trunk. Occurrence within the abdominal cavity is known to be very rare, and especially in the liver, there has been no reported case up to date. The authors have experienced intravascular papillary endothelial hyperplasia of the liver in a 69-yr-old woman, and report the case with a review of the literature.- - - - - - - - - - ranking = 0.85714285714286keywords = hyperplasia (Clic here for more details about this article) |
9/24. Intravascular papillary endothelial hyperplasia (Masson's tumor) presenting as a triceps mass.Intravascular papillary endothelial hyperplasia (IPEH) is a nonneoplastic reactive endothelial proliferation most commonly located in the skin or subcutaneous tissues although it has been reported in multiple locations throughout the body. We present a case of intravascular papillary endothelial hyperplasia presenting as a soft tissue mass in the triceps muscle. IPEH is not well-described in the radiologic literature.- - - - - - - - - - ranking = 0.85714285714286keywords = hyperplasia (Clic here for more details about this article) |
10/24. Hepatic hemangioendotheliomas, placental chorioangiomas, and dysmorphic kidneys in beckwith-wiedemann syndrome.A 4-month-old female, birth weight 3150 g, had a history of maternal eclampsia, multiple placental chorioangiomas, and persistent neonatal hypoglycemia. macroglossia and enlarged kidneys were recorded. autopsy revealed multiple hepatic hemangioendotheliomas (type 1), massive cardiomegaly, and bilateral nephromegaly. Both kidneys were lobulated with active glomerulogenesis and clusters of immature tubules and foci of dysplastic medullary ducts. The features suggest that the nephrogenesis was secondary to the persistence of actively branching nephron-inducing ducts. Nodular hyperplasia of the adrenal cortex (adrenoblastomatosis) was present. This report expands the list of tumors to be found in beckwith-wiedemann syndrome (BWS).- - - - - - - - - - ranking = 0.14285714285714keywords = hyperplasia (Clic here for more details about this article) |
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