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Frontiers in Neurology 2021Gray matter pathology plays a central role in the progression of multiple sclerosis (MS). The occurrence of synaptic loss appears to be important but, to date, still...
Gray matter pathology plays a central role in the progression of multiple sclerosis (MS). The occurrence of synaptic loss appears to be important but, to date, still poorly investigated aspect of MS pathology. In this systematic review, we drew from the recent knowledge about synaptic loss in human post-mortem studies. We conducted a systematic search with PubMed to identify relevant publications. Publications available from15 June 2021 were taken into account. We selected human post-mortem studies that quantitatively assessed the synapse number in MS tissue. We identified 14 relevant publications out of which 9 reported synaptic loss in at least one investigated subregion. The most commonly used synaptic marker was synaptophysin; non-etheless, we found substantial differences in the methodology and the selection of reference tissue. Investigated regions included the cortex, the hippocampus, the cerebellum, the thalamus, and the spinal cord. Synaptic loss seems to take place throughout the entire central nervous system. However, the results are inconsistent, probably due to differences in the methodology. Moreover, synaptic loss appears to be a dynamic process, and thus the nature of this pathology might be captured using synaptic density measurements.
PubMed: 34912290
DOI: 10.3389/fneur.2021.782599 -
Diagnostic Cytopathology Jun 2023Solid-papillary carcinoma (SPC) of the breast is a rare variant of low-grade in situ and invasive carcinoma but there are only a few of the cytologic studies.
BACKGROUND
Solid-papillary carcinoma (SPC) of the breast is a rare variant of low-grade in situ and invasive carcinoma but there are only a few of the cytologic studies.
METHODS
We examined 44 cases of SPC of the breast to define the cytologic features. We also made a systemic review of reported cases of SPC and neuroendocrine tumor (NET) of the breast.
RESULTS
Both of our and the reviewed cases with SPC were very similar in the cytologic finding. It included hypercellularity, highly discohesive clusters, numerous isolated cells, small nuclei, finely granular chromatin of salt-and-pepper appearance, inconspicuous nucleoli, low nuclear-cytoplasmic ratio, and a plasmacytoid appearance. Moreover, SPC and NET had frequently all of these features in common. Capillary vessels structures and mucinous substance were not frequently seen in our and the reviewed cases with SPC. Rosette and pseudorosette were very rare in the cytologic specimen. The immunocytochemistry with our 9 cases with SPC indicated diffuse positivity for chromogranin A and/or synaptophysin.
CONCLUSION
Many cytologic features are frequently shared by SPC and NET of the breast. However, the vascular structure may not be a precise criterion for SPC. Rosette and pseudorosette are rarely helpful for the cytologic diagnosis.
Topics: Female; Humans; Breast; Breast Neoplasms; Carcinoma, Ductal, Breast; Carcinoma, Neuroendocrine; Carcinoma, Papillary; Neuroendocrine Tumors
PubMed: 36748676
DOI: 10.1002/dc.25112 -
Scientific Reports Sep 2020Small cell neuroendocrine carcinoma of the cervix (SCNECC) is a highly invasive cervical cancer. The immunohistochemical criteria is an important aspect for assistant... (Meta-Analysis)
Meta-Analysis
Small cell neuroendocrine carcinoma of the cervix (SCNECC) is a highly invasive cervical cancer. The immunohistochemical criteria is an important aspect for assistant diagnosis of SCNECC. However, which markers can be appropriate selection for diagnosing SCNECC were not determined. The aim was to systematically evaluate expression levels of four neuroendocrine markers (containing synaptophysin (Syn), neural cell adhesion molecules (CD56), neuron-specific enolase (NSE) and chromograninA (CgA)) and to find out the appropriate selection for diagnosing SCNECC. Four English and three Chinese libraries were retrieved between 1984 and 2020. 23 studies about NSE, 36 studies about Syn, 23 studies about CD56 and 36 studies about CgA (all studies containing 581 patients) were eligible for meta-analyses. The pooled positive expression percentages (95% CI; I) were as follows: 84.84% (79.41-90.27%; 76.7%) for Syn, 84.53% (79.43-89.96%; 37.5%) for CD56, 77.94% (69.13-86.76%; 83.5%) for NSE, and 72.90% (67.40-78.86%; 59.7%) for CgA. The positive proportions (95% CI; I) ranked top three of simultaneous expressions of two markers were 87.75% (82.03-93.87%, 33.3%) for Syn and CD56, 70.92% (50.50-87.68%, 82.7%) for Syn and NSE, 65.65% (53.33-76.98%, 73.5%) for Syn and CgA. This confirms that Syn and CD56 are reliable indicators for diagnosing SCNECC.
Topics: Biomarkers, Tumor; Carcinoma, Neuroendocrine; Carcinoma, Small Cell; Female; Humans; Neoplasm Proteins; Uterine Cervical Neoplasms
PubMed: 32917946
DOI: 10.1038/s41598-020-72055-x -
International Journal of Gynecological... Sep 2021Cellular fibromas represent ~10% of ovarian fibromas. Mitotically active cellular fibromas show mild nuclear atypia but ≥4 mitoses/10 high-power fields: the clinical...
Cellular fibromas represent ~10% of ovarian fibromas. Mitotically active cellular fibromas show mild nuclear atypia but ≥4 mitoses/10 high-power fields: the clinical course is usually uneventful but literature review is lacking. A 34-yr-old woman underwent left oophorectomy for a 9-cm ovarian mitotically active cellular fibroma at another hospital. The tumor was cellular (spindle cells in fascicular and storiform patterns) revealing mild atypia and 4 nonatypical mitoses/10 high-power fields without necrotic areas. After 16 yr, the tumor recurred as a 5-cm peritoneal nodule on the anterior sigmoid wall near the sigmoid-rectal junction. Frozen section revealed a spindle cell tumor invading the intestinal tunica muscularis propria: a gastrointestinal stromal tumor was favored as previous history was unavailable at that time. Intestinal resection was performed: no residual tumor was found. The patient was followed-up for 8 yr without further recurrences. The peritoneal nodule showed 2 mitoses/10 high-power fields and pericellular reticulin staining. The tumor was variably positive for vimentin/bcl-2/melan-A/CD56/ER/PR/α-inhibin/CD10/calretinin, focally positive for desmin, negative for pan-cytokeratin/actin/EMA/CD34/HMB45/CD117/CD99/S100/synaptophysin. The Ki67-index was ~9%. To our systematic literature review, 7 additional recurrent cases were reported. We describe a mitotically active cellular fibroma recurring after the longest interval of time. Extensive sampling of difficult cases should exclude malignant areas. Moderate nuclear atypia, tumor rupture, adhesions to pelvic/abdominal organs, infarction with extraovarian involvement, and incomplete excision may lead to relapse but there are conflicting data: prolonged follow-up can be suggested in these cases.
Topics: Adult; Biomarkers, Tumor; Diagnosis, Differential; Female; Fibroma; Humans; Inhibins; Keratins; Neoplasm Recurrence, Local; Ovarian Neoplasms; Ovary; Synaptophysin; Vimentin
PubMed: 33252401
DOI: 10.1097/PGP.0000000000000731