1,721,005 research outputs found
Covid-19 nephropathy: What could pathologist say?
Full text linkImplication for health policy/practice/research/medical education: The pathogenetic mechanism of renal involvement in coronavirus disease 19 (COVID-19) is still unclear. It is supposed to result from a combination of several contributing factors, such as state of dehydration, leading to pre-renal failure with acute tubular necrosis, toxic tubular damage, induced by cytokine storm or rhabdomyolysis, cytopathic action induced by the virus that invades ACE2- expressing kidney cells and drug-induced nephrotoxicity
A 75-year-old woman presenting with nasal vestibulitis
No full textA 75-year old woman presenting with nasal vestibuliti
The Rarity in the Rarity: Presentation of Three Cases of Cutaneous Carcinosarcoma with Clinical and Histopathological Insights
Full text linkfirst_page settings Order Article Reprints Open AccessCase Report The Rarity in the Rarity: Presentation of Three Cases of Cutaneous Carcinosarcoma with Clinical and Histopathological Insights by Gerardo Cazzato 1,* [ORCID] , Anna Colagrande 1 [ORCID] , Valentina Caputo 2 [ORCID] , Giuseppe Ingravallo 1 [ORCID] , Eliano Cascardi 1 [ORCID] , Francesco Fortarezza 3 [ORCID] , Emanuela Bonoldi 2 and Franco Rongioletti 4 [ORCID] 1 Section of Molecular Pathology, Department of Precision and Regenerative Medicine and Ionian Area (DiMePRe-J), University of Bari “Aldo Moro”, 70124 Bari, Italy 2 U.O. Anatomia Patologica, ASST Grande Ospedale Metropolitano Niguarda, 20162 Milan, Italy 3 Surgical Pathology and Cytopathology Unit, University Hospital of Padova, 35100 Padova, Italy 4 Dermatology Clinic, Vita-Salute San Raffaele University, 20132 Milan, Italy * Author to whom correspondence should be addressed. Dermatopathology 2024, 11(3), 209-217; https://doi.org/10.3390/dermatopathology11030022 Submission received: 31 May 2024 / Revised: 10 July 2024 / Accepted: 12 July 2024 / Published: 15 July 2024 Download keyboard_arrow_down Browse Figures Review Reports Versions Notes Abstract A cutaneous carcinosarcoma (cCS) is a rare and aggressive skin cancer characterized by both carcinomatous (epithelial) and sarcomatous (mesenchymal) components, making it a biphasic tumor. Despite its occurrence in various organs, a cCS is exceptionally rare in the skin, predominantly affecting older males. The etiology of a cCS is unclear, but it may originate from a single progenitor cell capable of dual differentiation or from a collision of carcinoma and sarcoma cells. Clinically, a cCS presents as a rapidly growing, painful, ulcerated nodule or plaque on sun-exposed skin, with a high risk of local invasion and metastasis. Histopathologically, a cCS includes various epithelial components, such as squamous cell carcinoma and basal cell carcinoma, along with undifferentiated sarcomatous components resembling atypical fibroxanthoma. The tumor may also exhibit heterologous differentiation like angiosarcomatous or rhabdomyosarcomatous features. We present three cases of a cCS, highlighting their clinical and histological characteristics and comparing them with previously reported cases. Understanding a cCS is complicated by its rarity and diverse presentation, emphasizing the need for further research to elucidate its pathogenesis and optimal management
Splenic abscesses as a first manifestation of Crohn's disease: A case report
Full text linkBackground Splenic nodules are uncommon entities that occur rarely in the general population. Although an infectious etiology (primarily bacteria, followed by mycobacteria) is usually found, noninfectious diseases, including malignancies and autoimmune disorders, can also be involved. For instance, in course of inflammatory bowel diseases (IBDs), in particular Crohn's Disease, aseptic splenic abscesses have been reported in patients with a long history of illness, or in those unresponsive to medical treatments, while are only anecdotally reported in the early phase of the disease. Hence, we presented the case of aseptic splenic nodules as a first manifestation of Crohn's Disease. Case presentation A 21-year-old woman with a silent medical history was admitted to the Emergency Department of our hospital complaining of fever of 38-39 degrees C (mainly in the evening) for the past 10 days and left flank abdominal pain, accompanied by sweating and fatigue. An abdominal computed tomography showed multiple splenic nodules of unknown origin. Because of the absence of clinical improvement after several antibiotic therapiesand a positron emission tomography (PET) with hypercaptation strictly localized to spleen, she underwent splenectomy, in suspicion of lymphoma. For persistence of symptoms after splenectomy, she underwent many instrumental examination, including a colonoscopy with bowel and intestinal biopsies that poses diagnosis of Crohn's disease. A second PET confirmed this diagnosis showing this time also the gastrointestinal involvement. Conclusion An unusual onset of Crohn's disease with multiple splenic nodules is reported. This case suggests that in light of splenic nodules of unknown etiology attention should be paid to all possible diagnoses of aseptic abscesses, including IBDs (primarily Crohn's Disease)
Exploring the pathologist's role in understanding COVID-19: from pneumonia to long-COVID lung sequelae
Full text link: The crucial role of pathologists in enhancing our understanding of SARS-CoV-2-related disease, from initial pneumonia manifestations to persistent long COVID lung symptoms, is the focus of this review. Pathological explorations have offered unprecedented insights into the early stages of severe COVID-19, shedding light on the interplay between the virus and subsequent complications, thereby shaping clinical approaches. Growing interest is directed to residual lung abnormalities of COVID-19 survivors. Although various radiological studies reported long-lasting pulmonary changes (e.g., ground glass opacities, reticulations, and bronchiectasis), the true incidence of pulmonary fibrosis and corresponding pathological findings in these patients remains largely unknown. There are a few high-impact and knowledgeable works on late complications in COVID-19 survivors, several coming from explant or autopsy cases, and rare cases from in vivo sampling. The study of biopsy samples has further deepened our knowledge of the aftermath of COVID-19 on lung tissue, uncovering alterations at the cellular level and shifts in vascular and epithelial dynamics. Despite the substantial progress made, future research is needed to devise a uniform strategy for interpreting lung biopsies, with a focus on leveraging advanced tools such as molecular and digital pathology techniques, along with artificial intelligence
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
The coexistence of membranous glomerulonephritis and its cause in the same biopsy: The two faces of IgG4-related kidney disease
Full text linkIgG4-related disease (IgG4-RD) is a systemic immune-mediated disease characterized by fibroinflammatory tumor-like masses that show the peculiar morphological features of storiform fibrosis, lymphoplasmacytic infiltrates rich in IgG4 positive plasma cells and obliterans phlebitis. The disease affects virtually any organ or apparatus and is often associated with increased serum IgG4 levels. Many previously described conditions (e.g. autoimmune pancreatitis, Mikulicz’s syndrome, Küttner’s tumor, and Riedel’s thyroiditis) are now classified to be part of IgG4-RD with the characteristic clinic, serologic and pathologic features. The kidney represents an important target-organ of the disease, mainly as tubulointerstitial nephritis (TIN). Nevertheless, some cases of glomerular disease, especially membranous glomerulonephritis (MNG), have been described in IgG4-related TIN. We report a case of IgG4-related kidney disease in which the two pathological patterns, TIN and MNG, were observed simultaneously in the same biopsy
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