Publications by authors named "Jiri Lenz"

Endometriosis is a chronic, estrogen-dependent, inflammatory disease characterized by the growth of endometriotic tissue outside the uterus. Among the wide spectrum of clinical manifestations of endometriosis, chronic pelvic pain, dysmenorrhea, dyspareunia and subfertility are the main symptoms that significantly reduce the quality of life of affected women. Despite the fact that endometriosis is considered a benign disease, it shares some features typical of malignant tumors.

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Carcinoma cuniculatum is a very rare subtype of well-differentiated squamous cell carcinoma affecting several anatomical locations, including the penis. In this paper, we describe a case report of penile carcinoma cuniculatum highlighting some unusual clinical features. The patient was 61-year-old with a cauliflower-like tumor of the glans penis of less than 1-year duration.

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Clear cell renal cell carcinoma (CCRCC) displays a variety of architectural patterns, which are often intermingled. However, a predominant or purely multicystic growth with diffuse intracystic hemorrhage leading to hemangioma-like histomorphology, is extremely rare in CCRCC. In this article, we describe a CCRCC exhibiting a pure hemangioma-like architecture and aggressive behavior.

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Sarcoidosis is a disease characterised primarily by lung tissue involvement. Extrapulmonary involvement, particularly in the genitourinary tract, is extremely rare, particularly when it comes to primary disease detection in this location. The gold standard in establishing a definitive diagnosis of sarcoidosis is a combination of the clinical picture, the results of imaging methods, and histopathological examination from the biopsy taken (thus ruling out other causes of granulomatous inflammation).

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Article Synopsis
  • Amyloidosis is a rare disorder caused by misfolded proteins, leading to abnormal deposits in tissues, including the lungs, where nodular pulmonary amyloidosis is particularly uncommon and often asymptomatic.* -
  • The only documented case of nodular pulmonary amyloidosis causing clinical symptoms, like spontaneous pneumothorax, involved an 81-year-old male with an AH-dominant type, highlighting its rarity and complexity.* -
  • Accurate identification of amyloid types is challenging but essential for understanding the underlying disease and determining appropriate diagnostic and treatment strategies, making it important in differential diagnoses of pulmonary conditions.*
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This study was conducted to investigate a comprehensive effect of 17α-ethinylestradiol (EE2) in zebrafish (Danio rerio) with the emphasis on endocrine disruption, oxidative stress and detoxification processes at different levels. Adult male triploid zebrafish were exposed to EE2 administered in feed at two concentrations - 10 and 1000 μg/kg for six weeks. The estrogenic potential of EE2 was evaluated using an analysis of vitellogenin, gene expression focused on reproductive disorders and gonad histological examination.

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Extraskeletal myxoid chondrosarcoma (EMC) is a rare sarcoma of uncertain lineage. Insulinoma-associated protein 1 (INSM1) has recently been described as a highly specific and sensitive immunohistochemical marker for EMC. The goal of this study was to evaluate the diagnostic significance of INSM1 immunohistochemistry in EMC.

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Background: There are currently insufficient data on the population of endometrial epithelial stem/progenitor cells in farm animals.

Objectives: With the aim of identifying a potential population of epithelial stem/progenitor cells in the porcine and bovine endometrium, this study immunohistochemically examined the expression patterns of the oestrogen and progesterone receptors, as well as that of the embryonal stem cell marker SOX2.

Methods: A total of 24 endometrial tissue samples obtained from cycling pigs (n = 12) and cows (n = 12) were included in our study.

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Delayed ejaculation belongs to the group of sexual disorders in men. The causes of delayed ejaculation or anejaculation are not exactly known. It is assumed that it can be caused by psychogenic or organic influences or their combinations.

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Article Synopsis
  • The study investigated how different doses of fluoxetine in food affect juvenile rainbow trout, focusing on their morphology, hematology, biochemistry, and oxidative stress.* -
  • Significant changes were observed in the fish's immune response, with an increased neutrophil/lymphocyte ratio and decreased lymphocyte count, alongside reduced detoxifying enzyme activity in the liver and kidney.* -
  • Histopathological analysis showed damage to the kidney's proximal tubules, confirming that fluoxetine has notable adverse effects on the health of rainbow trout.*
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Magnéli phase titanium suboxides (Magnéli TiO) are promising, novel materials with superior properties compared to TiO, they are substoichiometric titanium oxides with the chemical formula TiO (where n ≥ 1). In this study, for the first time, subchronic effects of dietary intake of Magnéli TiO were evaluated and compared with TiO particles of similar size, in concentrations 0.1% and 0.

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Background: Endometrial tissue plays an important role in the regulation of female fertility and there is evidence that endometrial pathology (including endometriosis) is closely related to endocrine disorders. On the other hand, various neuroendocrine changes can be significantly affected by psychosocial stress. In connection with these findings, we tested the relationship between neuroendocrine changes, sexual dysfunction, psychosocial/traumatic stress, and dissociative symptoms in women with endometriosis.

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Recent findings indicate that men with premature ejaculation report more frequent sexual problems associated with increased anxiety and interpersonal difficulties. Bearing this in mind, the neuroendocrine changes were examined in men with premature ejaculation and compared to other indicators of stressful experiences to see whether there can be any correlation which could indicate how these factors may contribute to the aetiology of premature ejaculation. Our study comprised 60 male outpatients diagnosed as having secondary premature ejaculation.

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Sexual dysfunctions in men are complex disorders that consist of organic and psychogenic components. The most common sexual dysfunction is erectile dysfunction. It is the inability to achieve or maintain an erection for satisfactory sexual performance.

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One of the most common sexual dysfunctional diseases in adult males is premature ejaculation. So far, there is no evidence of how premature ejaculation is associated with psychosocial stress. We tested the relationship between neuroendocrine changes in patients with premature ejaculation and indicators of stress experience as a new psychosomatic hypothesis where psychosocial stress may significantly contribute to the aetiology of premature ejaculation.

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Primary urethral adenocarcinomas are very rare neoplasms accounting for <10% of all urethral carcinomas. Site of their origin is unclear, but they seem to arise from Skene's paraurethral glands, which is the female homologue of the male prostate. The aim of this article is to report the first case of Skene's gland adenocarcinoma in which a molecular genetic profiling was performed.

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Aim: Endometriosis is an inflammatory condition that shares a number of similarities with malignant diseases, such as an abnormal morphology, migration along the nerve bundles and metastatic spread to lymph nodes and distant organs. Endometriotic lesions are associated with oestrogen and progesterone imbalance which seems to play a key role in the pathogenesis of endometriosis. The aim of this study was to compare the status of both oestrogen and progesterone receptors in tissue of deep infiltrating endometriosis, lymph node endometriosis and atypical ovarian endometriosis using immunohistochemical methods, as well as to investigate the relationship between endometriosis and protein p53.

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Nodular fasciitis (NF) is a benign self-limiting soft tissue lesion that has long been considered a reactive process. Recently, however, the USP6 gene rearrangement has been discovered, and the neoplastic nature of this tumor was suggested. Since then, many fusion partners of the USP6 gene have been reported, with the MYH9 gene as the most common.

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Aim: The aim of this paper is to describe an unique case of deep infiltrating endometriosis of the rectum in non-pregnant woman with unusual clinical and pathological presentation resulting in spontaneous perforation.

Materials And Methods: A female (20 years of age) with a two year history of chronic recurrent abdominal pain of unknown etiology treated by a psychiatrist underwent diagnostic laparoscopy which revealed many peritoneal implants of endometriosis involving the right ovarian fossa, the vesico-uterine pouch and sacrouterine ligament; the bowel wall showed no structural abnormalities. Peritonectomy of the broad and uterosacral ligaments was used and eight days after the operation, the patient developed crampy abdominal pain and enterorrhagia necessitating laparoscopic revision; pelvic haematoma and rectosigmoiditis were found.

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Case Report: We describe an unusual case of pelvic lymph node endometriosis with an aberrant immunophenotype mimicking metastasis of adenocarcinoma. A 37-year-old patient with a history of invasive cervical adenocarcinoma stage pT1a2 is presented. Due to insufficient loop electrosurgical excision procedure (LEEP) conization, total laparoscopic hysterectomy with pelvic lymphadenectomy was indicated.

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Article Synopsis
  • Pancreatic ductal adenocarcinoma is an aggressive cancer with poor prognosis, highlighting the need for new diagnostic and prognostic biomarkers.
  • This study analyzed microRNA expression in 74 tumor tissues, 18 chronic pancreatitis tissues, and 9 normal tissues, finding significant differences in levels of certain microRNAs.
  • The results suggest that specific microRNAs may serve as potential biomarkers for diagnosis and prognosis, as their levels correlate with disease progression and patient survival outcomes.
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Objectives: This study aimed to determine anterior gradient 2 (AGR2) expression in biopsies from pancreatic ductal adenocarcinomas (PDACs) and to evaluate AGR2 as a potential independent prognostic factor.

Methods: Tissue sample sections from a cohort of 135 consecutive surgically resectable PDACs were subjected to semiquantitative immunohistochemical analysis of AGR2 and mucin 4 (MUC4) expression.

Results: Anterior gradient 2 was over-expressed in PDAC compared with normal ductal cells.

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Background And Aims: Nestin is considered to be a marker of stem/progenitor cells in different tissues. Nestin expression was also described in various tumors. In pancreatic ductal adenocarcinoma (PDAC), its role in cancer cell migration, invasion, and metastases has been suggested.

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Aim: To perform a comparative analysis of clinicopathological correlations of cyclooxygenase-2 (COX-2) expression in pancreatic cancer, examined by monoclonal and polyclonal antibodies.

Methods: The COX-2 expression in 85 resection specimens of pancreatic ductal adenocarcinoma was immunohistochemically examined using both monoclonal and polyclonal antibodies. The final immunoscores were obtained by multiplying the percentage of positive cells with the numeric score reflecting the staining intensity.

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