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1.
Folia Neuropathol ; 59(3): 322-326, 2021.
Article in English | MEDLINE | ID: covidwho-1478320

ABSTRACT

Metastasis to a meningioma is an uncommon phenomenon however reported in the literature. Meningiomas are common primary intracranial tumours which most frequently occur to be a recepient of metastases. A 66-year-old female presented with rapid development of visual acuity and visual field loss in the right eye with ipsilateral oculomotor nerve palsy. Magnetic resonance imaging (MRI) showed well-defined tumour intensely enhanced with contrast like a typical skull base meningioma. The neuropathological examination revealed two different morphological fragments of the tumour. In the cell-rich part of the tumour, immunopositivity for CK, chromogranin, and SY were detected. The less cellular portion of the tumour, immunopositivity to epithelial membrane antigen (EMA) and vimentin were detected. To our knowledge, we present the first rare metastasis of neuroendocrine carcinoma to the medial sphenoid meningioma that preceded the clinical symptoms of systemic neuroendocrine carcinoma.

2.
Folia Neuropathol ; 59(3): 219-231, 2021.
Article in English | MEDLINE | ID: covidwho-1463956

ABSTRACT

Coronavirus disease 2019 (COVID-19) poses a global challenge to healthcare and society in the early 21st century. We report neuropathological changes in 52 patients aged between 22 years and 88 years (median 58 years) who were infected with the CoV-2 coronavirus. Patients died under various circumstances and had various pre-existing diseases. The inclusion criteria for this study were: positive result for the nasopharyngeal swab for SARS-CoV-2 RNA, diagnosis of pneumonia of SARS-CoV-2 or nucleoproteins of SARS-CoV-2 in pulmonary tissue confirmed by immunohistochemical methods (IHC). Samples from all brain structures and lung specimens were taken for histopathological examinations. Brain and pulmonary samples were stained typically with histological and immunohistochemical methods and small tissue fragments were examined with the transmission electron microscope (TEM). The light and electron microscopy examination confirmed the numerous neuropathological changes in the brains of the patients infected with the CoV-2. Many of these changes were caused by pre-existing diseases of patients and/or by necessary treatment. However, vascular lesions and the inflammatory process seem to be characteristic of the CoV-2 infection. In all of the structures of 52 brains of patients, damage of the vessel walls and morphological feature of the damage to the blood-brain barrier were observed. Lymphocytic and microglial infiltrates, both perivascular and diffuse, were also observed. Hence, the brain changes due to COVID-19 infection, could be called COVID-19 cerebral angiopathy with diffuse inflammation.


Subject(s)
Brain/pathology , COVID-19/pathology , Adult , Aged , Aged, 80 and over , Female , Humans , Male , Middle Aged , SARS-CoV-2
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