major salivary gland tumors are uncommon and the exact nature of these tumors is not obvious. this study was carried out to compare the histological results of intraoperative frozen sections against those of permanent reports for major salivary glands masses. one hundred thirty-nine patients with major salivary gland masses who were candidates for surgery underwent an intraoperative frozen sect...

Primary central nervous system lymphoma (PCNSL) is a rare cancer that confined to the brain, spinal cord, leptomeninges and eyes. The origin of this type of lymphoma is often type B lymphocytes, and because the central nervous system (CNS) has no lymph nodes or lymphatic vessels, the cause of PCNSL is still uncertain (1). But its source appears to be from lymphocytes located in the CNS (2). Thi...

ancient schwannomas rarely found in the central nervous system and ancient change in an intracranial schwannoma (intracranial portion of the trigeminal nerve) is extremely rare. a seventy-year man presented with headache of 3 months duration and one episode of generalized tonic-clonic seizures. imaging findings were suggestive of left temporal high grade lesion. during surgery there was well ca...

background: nodular hidradenoma or clear cell hidradenoma is a rare adnexal tumor arising from the eccrine glands. case report: a 60-year old female presented to the surgical out-patient clinic with complaints of breast lump of one year duration. fine needle aspirate (fna) of the lump yielded fluidly aspirate mixed with hemorrhage. on giemsa-stained smears, a possibility of benign cystic lesion...

Glioblastoma multiforme (GBM) is a malignant adult brain tumor that visualized as an enhancing lesion on post-contrast magnetic resonance imaging (MRI). In this study, we present rare case of non-enhancing GBM required histopathological examination for definitive diagnosis. Our findings emphasize the critical role biopsy in diagnosis and treatment GBMs, particularly cases lesions MRI.

Typically, the diagnosis of a tumor is done through surgical sampling, which is more precise with existing methods. The difference is that this is an aggressive, time consuming and expensive way. In the statistical method, due to the complexity of the brain tissues and the similarity between the cancerous cells and the natural tissues, even a radiologist or an expert physician may also be in er...

In recent years, brain tumors become the leading cause of death in the world. Detection and rapid classification of this tumor are very important and may indicate the likely diagnosis and treatment strategy. In this paper, we propose deep learning techniques based on the combinations of pre-trained VGG-16 CNNs to classify three types of brain tumors (i.e., meningioma, glioma, and pituitary tumo...

abstract background: asterocytoma is the most common primary human brain tumor which has the most lethal hazard among tumors in human central nervous system. heat shock proteins play an active role in cancer cells pathways through their effects on tumor cell proliferation, tumor differentiation, malignancy, metastasis, and cell death. hsp 70 is a 70 kd protein that its expression change has bee...

Abstract Glioma is the most prevalent type of primary brain tumor, and glioblastoma multiforme (GBM) highest deadly central nervous system (CNS) affecting a significant number patients each year, with median overall survival approximately 14.6 months after diagnosis. Despite intensive treatment, nearly all GBM experience recurrence, 5-year rate about 5%. The protective BBB high tumor heterogene...

abstract background cerebral neoplasm arises from brain, spinal cord and meningeal cells. not only malignant cerebral neoplasm also benign tumor could lead to death due to mass effect on vital structures. access to these tumors is difficult, and mri and ct scan could be helpful in determining anatomical location of tumors and distinction of malignant from benign. objective for better and earlie...