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Open research questions in Adrenal and Paraganglionic Tumors

45 unresolved questions extracted from the limitations and future-work sections of 229 Adrenal and Paraganglionic Tumors papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • The difficulty in predicting metastatic potential in pheochromocytoma. The need for preoperative alpha-adrenergic blockade to prevent intraoperative hypertensive crisis. The challenge of managing metastatic disease.

    Sporadic metastatic pheochromocytoma: A case report highlighting diagnostic and clinical considerations and brief literature review · 2026 · DOI

  • The rarity of CoGNET makes it challenging to study. The lack of comprehensive studies on CoGNET limits the understanding of its clinicopathological features. The diagnosis of CoGNET requires histopathological examination and IHC staining.

    Clinical and pathological features and treatment of nine cases of gastrointestinal composite gangliocytoma/neuroma and neuroendocrine tumor · 2026 · DOI

  • Major hemodynamic instability during tumor manipulation. Risk of cardiovascular collapse after venous clamping. Need for optimal medical preparation and rigorous intraoperative monitoring.

    PERIOPERATIVE MANAGEMENT OF PHEOCHROMOCYTOMA: A REPORT OF 5 CASES · 2026 · DOI

  • The study had a limited number of patients with PGL. The study did not investigate the underlying genetic variants of the tumors.

    Differences in management and outcomes between pheochromocytomas and sympathetic paragangliomas · 2026 · DOI

  • There is a limited number of studies directly comparing the differences in management and outcomes between PCC and PGL. The underlying genetic variants of the tumors and their impact on the presentation, management, and outcomes are not well understood.

    Differences in management and outcomes between pheochromocytomas and sympathetic paragangliomas · 2026 · DOI

  • The lack of typical tumor-related symptoms can lead to misdiagnosis of pheochromocytoma. The relationship between pheochromocytoma and cardiovascular and cerebrovascular events is not well understood.

    Pheochromocytoma complicated with acute myocardial infarction and cerebral infarction: a case report · 2026 · DOI

  • Nevertheless, the lack of correspondence between the robust SSTs expression in PPGL and the limited clini- cal evaluation of SSAs remains unclear.

    Functional profiling of somatostatin receptors identifies somatostatin receptor subtype 2 as a vulnerability in Succinate Dehydrogenase SDHB-deficient pheochromocytomas and paragangliomas · 2026 · DOI

  • This case report describes the diagnosis and treatment process of a patient with PHEO complicated by cardiac and cerebral infarction. With complete and thorough clinical data, it illustrates four successive dynamic adjustments to the antithrombotic regimen in accordance with clinical progression, providing an operable practical reference for the treatment of such complex cardiovascular and cerebrovascular complications. At the same time, this case systematically illustrates the vicious cycle mechanism of heart-brain interaction related to PHEO, which has rarely been systematically described in previous literature. However, these results are based on a single patient and have limited extrapolation. Furthermore, the patient and family declined coronary angiography, and coronary CTA has limited accuracy in evaluating plaque morphology in mild stenotic lesions. As a result, type 1 myocardial infarction cannot be completely excluded, which represents another limitation of this study. In addition, biochemical validation was not sufficient to complete plasma free metanephrine and normetanephrine testing. The patient’s family refused surgical treatment, so the long-term prognosis of cardiovascular and cerebrovascular events after tumor resection could not be evaluated.

    Pheochromocytoma complicated with acute myocardial infarction and cerebral infarction: a case report · 2026 · DOI

  • The study is limited to a single case of two monochorionic monoamniotic twin brothers. The study does not provide a large sample size or long-term follow-up.

    EL Tumor germinal pineal en gemelos monocoriónicos monoamnióticos adultos en UMAE 25, Monterrey Nuevo León. Reporte de caso y revisión bibliográfica. · 2026 · DOI

  • There is a lack of literature on germinal pineal tumors in adult patients. There is a need for a multidisciplinary approach for diagnosis and treatment.

    EL Tumor germinal pineal en gemelos monocoriónicos monoamnióticos adultos en UMAE 25, Monterrey Nuevo León. Reporte de caso y revisión bibliográfica. · 2026 · DOI

  • The size limit for robotic adrenalectomy is less clearly defined. There is a need for more research on the use of robotic adrenalectomy for large adrenal tumors.

    Robot-Assisted Adrenalectomy for a Giant Adrenal Myelolipoma: One of the Largest Tumors Removed by a Minimally Invasive Approach · 2026 · DOI

  • The mechanisms underlying ACC progression into a metastatic and lethal disease remain poorly understood. The evolutionary dynamics underpinning metastatic progression have remained unresolved.

    Genomic Catastrophe Defines the Evolutionary Trajectory of Adrenocortical Carcinoma · 2026 · DOI

  • The cohort used in this investigation only included advanced ACC. Due to the small number of patients the applicability to all ACC tumours is limited. Furthermore, as all patients underwent surgery for their relapse, a selection of patients with a less aggressive disease process may have occurred. To mitigate these issues, we verified many of our findings using other published reports on ACC. Moreover, as ACC represents a rare disease and removal and proper storage of high-quality fresh frozen metastatic tissue is even rarer, we believe that this report adds to the current knowledge of these tumours, despite its inherent biases.

    Genomic Catastrophe Defines the Evolutionary Trajectory of Adrenocortical Carcinoma · 2026 · DOI

  • Differentiating between benign and malignant adrenal tumors is crucial due to their significantly different prognoses. The diagnostic value of measuring CT values on non-contrast CT has been established, but approximately one-third of adrenal incidentalomas still have HU values >10.

    Habitat-radiomics combining multichannel 2.5D deep learning for differentiating adrenal adenomas from metastases using automatic segmentation: a multicenter study · 2026 · DOI

  • Current prognostic assessment has limited accuracy due to intertumoral heterogeneity. Molecular markers such as TP53 and CTNNB1 have limited predictive power. The role of anoikis in adrenocortical carcinoma is unclear.

    An anoikis-based risk model predicts outcomes and is associated with the immune microenvironment in adrenocortical carcinoma · 2026 · DOI

  • The lack of systematic characterization of CoGNET's full spectrum of clinicopathological features. The limited understanding of CoGNET's long-term prognosis. The need for comprehensive studies on CoGNET.

    Clinical and pathological features and treatment of nine cases of gastrointestinal composite gangliocytoma/neuroma and neuroendocrine tumor · 2026 · DOI

  • The increased cost and longer operative times are significant considerations. The steep learning curve and lack of tactile feedback can pose challenges for less experienced surgeons. Robotic adrenalectomy is not without limitations, particularly in resource-limited settings.

    Robotic Adrenalectomy for Large Virilizing Adrenal Mass: a Case Report and Literature Review · 2026 · DOI

  • Future research should focus on the long-term outcomes of patients who undergo robotic adrenalectomy. The use of robotic surgery for adrenal tumors should be compared to traditional open surgery and laparoscopic adrenalectomy.

    Robotic Adrenalectomy for Large Virilizing Adrenal Mass: a Case Report and Literature Review · 2026 · DOI

  • The association of nonmetastatic PPGLs with thromboembolic manifestations is rare and not well understood. The role of severe infectious etiologies in the development of consumptive coagulopathy in patients with paraganglioma is not well established.

    Retroperitoneal paraganglioma complicated by consumptive coagulopathy and severe Clostridioides difficile infection · 2026 · DOI

  • There is a lack of research on the clinical outcomes and prognostic factors after adrenalectomy for adrenal metastasis from HCC. Prior studies have focused on the treatment of HCC, but have not specifically addressed the management of adrenal metastases.

    Clinical outcomes and prognostic factors after adrenalectomy for adrenal metastasis from hepatocellular carcinoma · 2026 · DOI

  • Several limitations of this study merit discussion. Fourth, the lack of standardization in staging protocols, imaging modalities, and systemic therapy regimens across the prolonged 17-year inclusion period may have introduced heterogeneity in recur- rence detection.

    Clinical outcomes and prognostic factors after adrenalectomy for adrenal metastasis from hepatocellular carcinoma · 2026 · DOI

  • The incidence rate of paraganglioma in the urogenital system is very low, especially in the spermatic cord. There is a need to increase awareness of paraganglioma as a potential diagnosis in cases of inguinoscrotal masses.

    Paraganglioma of the Spermatic Cord: A Case Report and Literature Review of an Uncommon Entity · 2026 · DOI

  • There is a lack of understanding of Carney complex in children. There is a need for more research on the genetic causes of Cushing's syndrome in children.

    Cushing’s syndrome and early growth hormone hypersecretion in a child with Carney complex: a case report · 2026 · DOI

  • Given the extremely limited number of reported cases, current evidence is insufficient to either support or refute the efficacy of mitotane for SAC, and more multicenter large-sample studies are urgently needed.

    Sarcomatoid adrenocortical carcinoma with aggressive disease course: a rare case report and literature review · 2026 · DOI

  • Étude de la prévalence et de l'incidence du phéochromocytome ectopique. Évaluation de l'efficacité de la prise en charge des instabilités hémodynamiques peropératoires dans la réduction de la morbi-mortalité associée au phéochromocytome occulte.

    Prise en Charge Anesthésique et Chirurgicale d'un Phéochromocytome Ectopique de Découverte Fortuite : Un Cas Clinique Mauritanien · 2026 · DOI

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45 open questions have been extracted from the limitations and future-work passages of 229 Adrenal and Paraganglionic Tumors papers in our library. Each one below links back to the study that raised it, so you can read the original claim in context.

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