Histology and ultramorphology of the mesenteric sacs in the Neotropical termite Neocapritermes opacus (Blattaria, Termitidae, Termitinae)

Publication date: Available online 17 February 2020Source: Zoologischer AnzeigerAuthor(s): Iago Bueno da Silva, Sandra Daruiche Buganeme, Ana Maria Costa-LeonardoAbstractNeocapritermes opacus is a Neotropical termite, which feeds on a variety of food sources, including highly decayed wood and humus. Similar to many Termitidae, this species contains a mixed segment in the intestine, an anatomic distinct region composed of both mesenteric and proctodeal tissues. In Neocapritermes spp., a pair of intestinal protrusions referred to as mesenteric sacs are associated with the mixed segment. In the present study, with the aid of histological and scanning microscopy techniques, we provide a detailed anatomical and histological analyses of the mesenteric sacs in N. opacus workers. The results showed that the paired sacs are contiguous with the mesenteric component of the mixed segment and open into the ectoperitrophic space. The wall of the sacs is an epithelium composed of two types of cells (regenerative and principal) and musculature. The regenerative cells are located at the epithelium base and organized in regenerative crypts, while the principal cells are columnar and enfold the lumen of the sacs. Brush border was observed in the principal cell apex, aligned closely to rod-like bacteria. Secretory activity was observed in the principal cells and vesicles cast from them toward the sacs lumen, probably result of an apocrine activity. The sac epithelium was of mesenteric affiliatio...
Source: A Journal of Comparative Zoology - Category: Zoology Source Type: research

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Purpose of review The present review describes the current role of metabolic imaging techniques such as multiparametric MRI (mpMRI), magnetic resonance spectroscopic imaging (MRSI), hyperpolarized MRSI, and positron emission tomography (PET) in the diagnosis of primary prostate cancer, surveillance of low-grade disease, detection of metastases, and evaluation of biochemical recurrence after therapy. Recent findings The natural history of prostate cancer ranges from indolent disease that is optimally monitored by active surveillance, to highly aggressive disease that can be lethal. Current diagnostic methods remain imp...
Source: Current Opinion in Oncology - Category: Cancer & Oncology Tags: GENITOURINARY SYSTEM: Edited by Arif Hussain Source Type: research
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Source: Nuclear Medicine Communications - Category: Nuclear Medicine Tags: Original Articles Source Type: research
Aim The mylohyoid muscle is often believed to exhibit high physiologic fluoro-deoxy-glucose (FDG) uptake. Aim of this study was to use PET/MR for adequately assessing the normal FDG distribution in floor of the mouth (FOM) muscles and neighboring major salivary glands. Materials and methods Patients scanned with a simultaneous PET/MRI system for initial staging or follow-up of head and neck tumors, with no malignant lesions in salivary glands or in FOM, were included. Volumes-of-interest (VOIs) were positioned separately for bilateral mylohyoid, digastric, genioglossus, and geniohyoid muscles, based on T2-weighted and...
Source: Nuclear Medicine Communications - Category: Nuclear Medicine Tags: Original Articles Source Type: research
Conclusions L-SURmax showed the most powerful predictive performance than the other PET parameters in predicting occult lymph node metastasis. The combination of three independent risk factors (carcinoembryonic antigen, cytokeratin 19 fragment, and L-SURmax) can effectively predict occult lymph node metastasis in clinical N0 non–small cell lung cancer patients.
Source: Nuclear Medicine Communications - Category: Nuclear Medicine Tags: Original Articles Source Type: research
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Source: Nuclear Medicine Communications - Category: Nuclear Medicine Tags: Original Articles Source Type: research
Conclusion Semi-quantitative F-18 FDG PET parameters (SUVmax, MTV and T/L) were found to be significantly correlated with Fuhrman grade in patients with RCC and are important markers for differentiation between low- and high-grade tumors. Furthermore, forced diuresis had no incremental value in characterization of primary RCC lesions.
Source: Nuclear Medicine Communications - Category: Nuclear Medicine Tags: Original Articles Source Type: research
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Source: Nuclear Medicine Communications - Category: Nuclear Medicine Tags: Letter to the Editor Source Type: research
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Source: The Tohoku Journal of Experimental Medicine - Category: Research Authors: Tags: Tohoku J Exp Med Source Type: research
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Source: Applied Radiation and Isotopes - Category: Radiology Authors: Tags: Appl Radiat Isot Source Type: research
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Source: RSC - Phys. Chem. Chem. Phys. latest articles - Category: Chemistry Authors: Source Type: research
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