melanin/kraujavimas

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Effect of melanin on traumatic hyphema in rabbits.

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OBJECTIVE To investigate the role of melanin in influencing the clearance of traumatic hyphema and in the incidence of rebleeds following the hyphemas. METHODS Hyphemas were induced in 30 eyes of New Zealand white albino rabbits using an Nd:YAG laser. A total of 3.75 mg of synthetic melanin

Intracranial Neurenteric Cyst with an Enhanced Mural Nodule and Melanin Pigmentation: Radiologic-Pathologic Correlation.

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BACKGROUND An intracranial neurenteric cyst (NC) is a rare congenital benign lesion that usually has a well-demarcated cystic appearance without contrast enhancement on magnetic resonance imaging (MRI). In particular, an intracranial NC with an enhanced mural nodule is extremely rare. METHODS A

Cryosurgical Treatment of Gingival Melanin Pigmentation - A 30-Month Follow-Up Case Report

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Introduction: Cryosurgery is a branch of therapeutics that makes use of local freezing for the controlled destruction or removal of living tissues. Cryosurgery has been tried with satisfactory results for gingival depigmentation. However,

Sources of the increased longitudinal relaxation rates observed in melanotic melanoma. An in vitro study of synthetic melanins.

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Researchers have suggested that the increased longitudinal relaxation rates (1/T1) of solvent water protons often found in melanoma result either from the paramagnetism of stable free radicals occurring in melanin or from that of methemoglobin in nonacute hemorrhagic regions of the tumor. However,

Assessment of Melanin Content and its Influence on Susceptibility Contrast in Melanoma Metastases.

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To quantify the influence of melanin content on magnetic susceptibility of cerebral melanoma metastases.Patients with non-hemorrhagic metastases were included based on the absence of susceptibility blooming artifacts. Susceptibility maps were calculated

Complication After Cryosurgery Treatment for Gingival Melanin Pigmentation: A Case Report

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Introduction: Gingival melanin pigmentation (GMP) is considered a physiologic or racial situation. Complaints of "black gums" are common, and demands for depigmentation are usually made for esthetic reasons. In this case report, a

Human malignant melanomas with varying degrees of melanin content in nude mice: MR imaging, histopathology, and electron paramagnetic resonance.

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The etiology of the paramagnetic relaxation enhancement seen in malignant melanoma on proton magnetic resonance (MR) images has been the subject of many recent investigations and has been ascribed to iron from associated hemorrhage or chelated metal ions, rather than directly due to melanin. The

Gingival melanin pigmentation and its treatment with the CO2 laser.

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OBJECTIVE There are only a few reports in the literature evaluating the effects of the carbon dioxide (CO2) laser on gingival melanin pigmentation (GMP). This study was performed to evaluate the effects of the CO2 laser at superpulse mode, applied for gingival depigmentation. METHODS GMP at the

Stereotactic radiosurgery for brain metastases from malignant melanoma and the impact of hemorrhagic metastases.

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BACKGROUND Stereotactic radiosurgery (SRS) is a common treatment modality among patients with brain metastases, particularly from malignant melanoma. Our objective was to investigate the difference in local control, toxicity, and survival among patients with hemorrhagic and solid melanoma brain

Effect of spleen-invigorating, Qi-replenishing and blood-arresting formula on zebrafish models with simvastatin-induced hemorrhage caused by spleen failing to control blood, in terms of theory of Traditional Chinese Medicine.

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To investigate the hemostasis effect of spleen-invigorating, Qi-replenishing and blood-arresting formula, on a zebrafish models with simvastatin-induced hemorrhage, and with symptom pattern caused by spleen failing to control blood, in terms of theory of Traditional Chinese Medicine

Treatment of Gingival Melanin Hyperpigmentation With Er;Cr:YSGG Laser: Short-Term Follow-Up of Patient.

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The increasing melanin hyperpigmentation of dark skinned individuals is related to the high activity of melanocytes. A healthy 36-year-old female patient complained about unaesthetic gingiva and she had been smoking for over 17 years and also smoking reactive the melanocytes. Gingival depigmentation

The Role of Melanin to Dissociate Oxygen from Water to Treat Retinopathy of Prematurity

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Retinopathy of prematurity (ROP) is a potentially blinding disorder thatcommonly afflicts premature infants who are born prior to 31weeks of gestation or with a bodyweight less than 1250 grams (about 2.75 pounds). Another risk factor is excessive oxygen in incubators,which can lead to

Foveal hemorrhage in an eye with foveal hypoplasia associated with albinism.

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Oculocutaneous albinism is a group of congenital disorders caused by alterations of melanin biosynthesis. We report our findings in a patient with oculocutaneous albinism who presented with foveal hypoplasia and a foveal hemorrhage. A 48-year-old man noted a dark spot in the middle of the visual

Indocyanine green angiography in the presence of subretinal or intraretinal haemorrhages: clinical and experimental investigations.

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OBJECTIVE The absorption and emission characteristics of indocyanine green are associated with better penetration through ocular pigments, including melanin and blood, in comparison with fluorescein. Therefore, it has been assumed that indocyanine green angiography (ICG-A) allows better delineation

Primary hemorrhagic intramedullary melanoma. Case report with emphasis on the difficult preoperative diagnosis.

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Primary melanoma of the central nervous system (CNS) is rare and primary spinal melanoma (PSM) is even more unusual. Preoperative diagnosis of melanocytic lesion as a PSM is difficult, because of the heterogeneous magnetic resonance (MR) signal intensity, due to hemorrhagic foci and melanin

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