Hand2 is a core transcription factor responsible for chromaffin cell differentiation. However, its potential utility in surgical pathology has not been studied. Thus, we aimed to investigate its expression in paragangliomas, other neuroendocrine neoplasms (NENs), and additional non-neuroendocrine tumors. We calibrated Hand2 immunohistochemistry on adrenal medulla cells and analyzed H-scores in 46 paragangliomas (PGs), 9 metastatic PGs, 21 cauda equina neuroendocrine tumors (CENETs), 48 neuroendocrine carcinomas (NECs), 8 olfactory neuroblastomas (ONBs), 110 well-differentiated NETs (WDNETs), 10 adrenal cortical carcinomas, 29 adrenal cortical adenomas, 8 melanomas, 41 different carcinomas, and 10 gastrointestinal stromal tumors (GISTs). Both tissue microarrays (TMAs) and whole sections (WSs) were studied. In 171 NENs, previously published data on Phox2B and GATA3 were correlated with Hand2. Hand2 was positive in 98.1% (54/55) PGs, but only rarely in WDNETs (9.6%, 10/104), CENETs (9.5%, 2/21), NECs (4.2%, 2/48), or ONBs (12.5%, 1/8). Any Hand2 positivity was 98.1% sensitive and 91.7% specific for the diagnosis of PG. The Hand2 H-score was significantly higher in primary PGs compared to Hand2-positive WDNETs (median 166.3 vs. 7.5; p < 0.0001). Metastatic PGs were positive in 88.9% (8/9). No Hand2 positivity was observed in any adrenal cortical neoplasm or other non-neuroendocrine tumors, with exception of 8/10 GISTs. Parasympathetic PGs showed a higher Hand2 H-score compared to sympathetic PGs (median H-scores 280 vs. 104, p < 0.0001). Hand2 positivity in NENs serves as a reliable marker of primary and metastatic PG, since other NENs only rarely exhibit limited Hand2 positivity.

• MeSH
• imunohistochemie MeSH
• lidé MeSH
• neuroendokrinní karcinom * patologie   MeSH
• neuroendokrinní nádory * patologie   MeSH
• paragangliom * diagnóza   patologie   MeSH
• transkripční faktory metabolismus   MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH

Pancreatic polypeptide cell hyperplasia (PPY-H) is a multiplication of the neuroendocrine cells producing pancreatic polypeptide (PPY). The development and role of PPY-H and its corresponding clinical and imaging findings still need to be fully elucidated. We present 12 cases of PPY-H accompanying pancreatic neuroendocrine neoplasias (NEN). PPY-H was analyzed with the help of immunohistochemistry and confocal microscopy; preoperative clinical data and imaging studies were evaluated retrospectively. We observed PPY-H emerging from pancreatic ducts, and in some cases, we observed simultaneous NKX6.1 positivity in ducts and PPY-H. Additional clinical-pathological correlations suggests that gastrointestinal symptoms (e.g., epigastric pain and cholestasis) could be more related to PPY-H than to NEN hormonal production. In particular cases, SSTR2 expression was strong in PPY-H and correlated with distinguishable accumulation of activity next to NEN on 99 mTc EDDA/Hynic-TOC SPECT/CT. In another case, 18F-FDG-PET/CT showed increased metabolic activity in the area of PPY-H surrounding NEN. Our data suggest that PPY-H originates in the lining of pancreatic ducts. Confirmation of SSTR2 in PPY-H, using immunohistochemistry, suggests the utility of 99 mTc EDDA/Hynic-TOC or 68Ga-DOTA radiotracers in clinical diagnostics; however, studies with larger cohort are needed.

• MeSH
• EDTA analogy a deriváty   MeSH
• hyperplazie MeSH
• lidé MeSH
• nádory slinivky břišní * patologie   MeSH
• neuroendokrinní nádory * patologie   MeSH
• nukleární lékařství * MeSH
• organotechneciové sloučeniny MeSH
• pankreatický polypeptid MeSH
• PET/CT MeSH
• retrospektivní studie MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH

Cauda equina neuroendocrine tumors (CENETs) are neoplasms of uncertain histogenesis with overlapping features between those of paragangliomas (PGs) and visceral neuroendocrine tumors (NETs). We have explored their biological relationship to both subsets of neuroendocrine neoplasms. The clinical and radiological features of a cohort of 23 CENETs were analyzed. A total of 21 cases were included in tissue microarrays, along with a control group of 38 PGs and 83 NETs. An extensive panel of antibodies was used to assess epithelial phenotype (cytokeratins, E-cadherin, EpCAM, Claudin-4, EMA, CD138), neuronal and neuroendocrine features (synaptophysin, chromogranin A, INSM1, neurofilaments, NeuN, internexin-α, calretinin), chromaffin differentiation (GATA3, Phox2b, tyrosine hydroxylase), and possible histogenesis (Sox2, T-brachyury, Oct3/4, Sox10). The cohort included 5 women (22%) and 18 men (78%). The average age at the time of surgery was 48.3 years (range from 21 to 80 years). The average diameter of the tumors was 39.27 mm, and invasion of surrounding structures was observed in 6/21 (29%) tumors. Follow-up was available in 16 patients (median 46.5 months). One tumor recurred after 19 months. No metastatic behavior and no endocrine activity were observed. Compared to control groups, CENETs lacked expression of epithelial adhesion molecules (EpCAM, CD138, E-cadherin, Claudin-4), and at the same time, they lacked features of chromaffin differentiation (GATA3, Phox2b, tyrosine hydroxylase). We observed no loss of SDHB. Cytokeratin expression was present in all CENETs. All the CENETs showed variable cytoplasmic expression of T-brachyury and limited nuclear expression of Sox2. These findings support the unique nature of the neoplasm with respect to NETs and PGs.

• MeSH
• adhezní molekula epiteliálních buněk MeSH
• cauda equina * metabolismus   patologie   chirurgie   MeSH
• claudin-4 MeSH
• lidé MeSH
• lokální recidiva nádoru patologie   MeSH
• nádory centrálního nervového systému * patologie   MeSH
• neuroendokrinní nádory * patologie   MeSH
• paragangliom * MeSH
• represorové proteiny MeSH
• transkripční faktory MeSH
• tyrosin-3-monooxygenasa MeSH
• Check Tag
• lidé MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH

• MeSH
• angiomyolipom diagnóza   klasifikace   patologie   MeSH
• dospělí MeSH
• karcinoid diagnóza   patologie   MeSH
• lidé MeSH
• mTOR inhibitory terapeutické užití   MeSH
• nádory ledvin diagnóza   klasifikace   MeSH
• nádory slinivky břišní diagnóza   klasifikace   MeSH
• neuroendokrinní nádory * diagnostické zobrazování   diagnóza   klasifikace   patologie   MeSH
• tuberózní skleróza * diagnóza   farmakoterapie   komplikace   patologie   MeSH
• Check Tag
• dospělí MeSH
• lidé MeSH
• ženské pohlaví MeSH
• Publikační typ
• kazuistiky MeSH

• MeSH
• gastrointestinální nádory diagnóza   farmakoterapie   klasifikace   MeSH
• karcinoid diagnóza   klasifikace   MeSH
• lidé MeSH
• nádory hrtanu diagnóza   farmakoterapie   komplikace   patologie   MeSH
• náhodný nález MeSH
• neuroendokrinní nádory * diagnóza   farmakoterapie   klasifikace   patologie   MeSH
• radioterapie metody   MeSH
• senioři MeSH
• tenké střevo * patologie   MeSH
• Check Tag
• lidé MeSH
• mužské pohlaví MeSH
• senioři MeSH
• Publikační typ
• kazuistiky MeSH

HoxB13 is a transcription factor involved in defining of posterior endodermal derivatives, including prostate and rectum. While it is used as a marker of prostatic adenocarcinoma, it has not been studied systematically in neuroendocrine neoplasms. Thus, we performed HoxB13 immunohistochemistry in tissue microarrays and the whole sections of 232 neuroendocrine neoplasms. These included 34 paragangliomas (PGs), 20 cauda equina neuroendocrine tumors (CENETs), 123 well-differentiated neuroendocrine tumors (WDNETs), and 55 neuroendocrine carcinomas (NECs). WDNETs were additionally analyzed with SATB2, and colorectal WDNETs with CDX2 and serotonin immunohistochemistry. In total, HoxB13 immunoreactivity was observed in 95% (19/20) CENETs, 10.6% (13/123) WDNETs, and 12.9% (7/54) NECs. No PGs were positive. Large intestine WDNETs expressed HoxB13 in 68.4% (13/19); five negative tumors originated in cecum and one in rectum. In rectum, 92.9% (13/14) WDNETs expressed HoxB13. HoxB13 was 92.9% sensitive and 100% specific, showing 100% positive predictive value for the rectal origin of WDNET. In NECs, HoxB13 was positive in 15.4% (2/13) GIT tumors and 80% (4/5) prostatic NECs, but in none of urinary bladder NECs (0/8). SATB2 was positive in 17.1% (21/123) WDNETs, including 78.9% (15/19) of colorectal WDNETs, 71.4% (5/7) appendiceal WDNETs, and 2.9% (1/34) small intestine WDNETs. All 4 SATB2-negative large bowel tumors originated in the cecum. When both markers combined, HoxB13+/SATB2+ immunoprofile was seen exclusively in rectal WDNETs (positive predictive value 100%), while HoxB13-/SATB2+ immunoprofile was highly suggestive of the appendiceal origin (positive predictive value 71.4%). Therefore, HoxB13 can be useful as an immunohistochemical marker of rectal WDNETs and prostatic NECs.

• MeSH
• homeodoménové proteiny MeSH
• kolorektální nádory * MeSH
• lidé MeSH
• nádorové biomarkery MeSH
• nádory močového měchýře * MeSH
• nádory rekta * diagnóza   patologie   MeSH
• neuroendokrinní karcinom * diagnóza   MeSH
• neuroendokrinní nádory * diagnóza   patologie   MeSH
• transkripční faktory MeSH
• Check Tag
• lidé MeSH
• mužské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH

Úvod: V našem příspěvku chceme připomenout vzácnou diagnózu. Kazuistika: 54letý pacient, obézní hypertonik a kuřák, byl 12 let ošetřován pro intermitentní bolesti břicha. První gastroskopii pro krvácející vřed absolvoval v r. 2010. V dalších letech následovaly opakované gastroskopie s proměnlivým postižením jícnu až duodena. Kapslová enteroskopie diagnostiku dále neposunula. Pacient několikrát podstoupil koloskopii a MR enterografii, jednoznačně patologický nález nepřinesly. V květnu 2022 byl přijat na naše oddělení pro bolesti břicha, zvracení. Tentokrát na gastroskopii byly patrné mnohočetné drobné ulcerace duodena a jejuna s koaguly, která činila mechanickou překážku. Pro podezření na gastrinom byl doplněn chromogranin A, který byl vysoký. Somatostatinový octreoscan byl však negativní. Až 68Ga-DOTATOC PET (pozititronová emisní tomografie s radiofarmakem DOTA, značeným galiem68) nalezl ložisko v podjaterní krajině, které ale nemělo žádný korelát na CT. Diagnózu jsme uzavřeli jako gastrinom s Zollinger-Ellisonovým syndromem. Endoskopicky se podařilo nalézt asi 1cm tumor duodena. Pacient v říjnu 2022 podstoupil excizi stěny duodena. Patolog potvrdil naši diagnózu gastrinomu. Závěr: Touto kazuistikou chceme připomenout, že i neuroendokrinní tumory musíme zařadit do našich diferenciálně diagnostických úvah. Současně chceme upozornit, že dle ESMO doporučení bychom měli k diagnostice preferenčně využívat 68Ga-DOTATOC PET/CT místo scintigrafického vyšetření (111In-Octreoscanu).

Introduction: In our text, we want to highlight a rare diagnosis. Case report: A 54-year-old obese, hypertensive male smoker had been investigated for intermittent abdominal pain for 12 years. The first gastroscopy for a bleeding ulcer was conducted in 2010. In the subsequent years, repeated gastroscopies revealed variable involvement from the esophagus to the duodenum. Capsule enteroscopy did not provide further specification of the diagnosis. The patient underwent colonoscopy and MRI enterography multiple times, with no unequivocal pathological findings. In May 2022, he was admitted to our department for abdominal pain and vomiting. This time, gastroscopy revealed multiple small ulcers in the duodenum and jejunum with clots causing a mechanical obstruction. Chromogranin A was elevated, raising suspicion of gastrinoma. However, somatostatin receptor-based imaging (Octreoscan) was negative. Only the 68Ga-DOTATOC PET (positron emission tomography with the radiopharmaceutical DOTA, labeled with gallium-68) identified a lesion in the subhepatic region, which had no correlation on CT. We concluded the diagnosis as gastrinoma with the Zollinger–Ellison syndrome. Endoscopically, a 1cm tumor was found in the duodenum. In October 2022, the patient underwent an excision of the duodenal wall, and the pathology assessment confirmed our diagnosis of gastrinoma. Conclusion: With this case report, we want to emphasize the importance of taking into account neuroendocrine tumors in our differential diagnostic considerations. At the same time, we want to highlight that, according to ESMO recommendations, we should preferentially use 68Ga-DOTATOC PET/CT for the diagnosis instead of scintigraphic examination (111In-Octreoscan).

• MeSH
• bolesti břicha etiologie   MeSH
• chromogranin A analýza   MeSH
• gastrinom * chirurgie   diagnostické zobrazování   patologie   MeSH
• gastriny analýza   MeSH
• inhibitory protonové pumpy terapeutické užití   MeSH
• lidé středního věku MeSH
• lidé MeSH
• nádory duodena * chirurgie   diagnostické zobrazování   patologie   MeSH
• neuroendokrinní nádory chirurgie   diagnostické zobrazování   klasifikace   patologie   MeSH
• PET/CT metody   MeSH
• Zollingerův-Ellisonův syndrom diagnóza   etiologie   patologie   MeSH
• Check Tag
• lidé středního věku MeSH
• lidé MeSH
• Publikační typ
• kazuistiky MeSH

Phox2B is a transcription factor responsible for chromaffin cell phenotype. Although it is used routinely for diagnosis of neuroblastoma, previous reports concerning its utility in the diagnosis of neuroendocrine neoplasms have been conflicting. We assessed Phox2b immunoreactivity in different neuroendocrine neoplasms. Tissue microarrays or whole sections of 36 paragangliomas (PGs), 91 well-differentiated neuroendocrine tumours of different organs (WDNETs), 31 neuroendocrine carcinomas (NECs), and 6 olfactory neuroblastomas (ONBs) were stained with Phox2B antibody (EP312) and GATA3. The percentage of positive cells and intensity was analysed using H-score. Phox2B immunoreactivity was seen in 97.2% (35/36) PGs, 11% (10/91) WDNETs, 9.7% (3/31) NECs, and 16.7% (1/6) ONBs. PGs were significantly more often positive (p < 0.001, χ2) than other neuroendocrine tumours, showing highest H-score (mean 144.9, SD ± 75.1) and percentage of positive cells (median 81.3%, IQR 62.5-92.5%). Compared to Phox2B-positive WDNETs, PGs showed significantly higher H-score (median 145 vs 7.5, p < 0.001) and percentage of positive cells (median 82.5% vs 4.5%, p < 0.001). Phox2B positivity was 97.2% sensitive and 89% specific for the diagnosis of PG. GATA3 was 100% sensitive and 88% specific for the diagnosis of PG. When combined, any Phox2B/GATA3 coexpression was 97.1% sensitive and 99.1% specific for the diagnosis of paraganglioma. Widespread Phox2B immunoreactivity is a highly characteristic feature of PGs and it can be used as an additional marker in differential diagnosis of neuroendocrine tumours.

• MeSH
• imunohistochemie MeSH
• lidé MeSH
• nádorové biomarkery analýza   MeSH
• neuroendokrinní karcinom * MeSH
• neuroendokrinní nádory * diagnóza   patologie   MeSH
• paragangliom * diagnóza   MeSH
• transkripční faktory analýza   MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH

BACKGROUND: Neuroendocrine neoplasms (NENs) are rare tumours with variable clinical behaviour. Their natural history is ideally best approached in large, multicentre and multinational registries with long-term patients' follow-up. The European Neuroendocrine Tumour Society registry aims to obtain information regarding NEN outcomes and prognostic factors in a European frame. PATIENTS AND METHODS: We collected data from 7 national NEN registries (Belgium, Czech Republic, Germany, Greece, Poland, Spain, Switzerland), representing 10,102 patients. Anonymised/pseudonymised data were collected in a secured server. Descriptive statistical methods were applied, as well as Kaplan-Meier survival curves and multivariable analyses for prognostic factors of overall survival (OS). RESULTS: median age of the study population was 60 years (range: 18-102), 48% were female. Common primary tumour sites were pancreas (27%) and small intestine (21%). Stage 4 disease was found in 47% of patients, while 26/10/16% had stage 1/2/3 disease, respectively. Grading (n = 6952) was G1/2/3 in 48/37/15% of the patients, respectively. Surgery was the main treatment, provided to 71% of patients, followed by somatostatin analogues (32%), chemotherapy (20%), Peptide receptor Radionuclide Therapy (PRRT) (9%) and targeted therapies (8%). OS at 5 years was 74%, influenced by grade, stage and tissue of origin in multivariate analysis. A Ki67 cut-off value set at 55% within the G3 group allowed to separate 2 groups with a meaningful different OS. CONCLUSION: We report the first analysis of the European Neuroendocrine Tumour Society registry, comprising 10,102 patients with NEN from 7 European countries. This large cohort study describes prognostic factors for the survival of NENs throughout Europe, including primary tumour site, grade, stage and treatment.

• MeSH
• dospělí MeSH
• kohortové studie MeSH
• lidé středního věku MeSH
• lidé MeSH
• mladiství MeSH
• mladý dospělý MeSH
• nádory slinivky břišní * patologie   MeSH
• neuroendokrinní nádory * patologie   MeSH
• prognóza MeSH
• registrace * MeSH
• retrospektivní studie MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• somatostatin MeSH
• Check Tag
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• mladiství MeSH
• mladý dospělý MeSH
• mužské pohlaví MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH

• MeSH
• dlouhodobá péče MeSH
• karcinoid * diagnóza   farmakoterapie   patologie   MeSH
• lidé MeSH
• management nemoci MeSH
• neuroendokrinní nádory diagnóza   patologie   terapie   MeSH
• počítačová rentgenová tomografie metody   MeSH
• senioři MeSH
• somatostatin analogy a deriváty   aplikace a dávkování   terapeutické užití   MeSH
• výsledek terapie MeSH
• Check Tag
• lidé MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• kazuistiky MeSH