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[112 cases of sporadic and genetically determined pheochromocytoma: a comparative pathologic study]
P Gosset1, M Lecomte-Houcke, A Duhamel
1Groupe d'Etude des Tumeurs Endocrines à Calcitonine (GETC), Faculté de Médecine de Lille.
Insights
Genetically determined pheochromocytomas (PH) present differently than sporadic PH, often being bilateral and more differentiated. Sporadic tumors show more aggressive features like invasion and necrosis.
Area of Science:
- Endocrinology
- Oncology
- Genetics
Background:
- Pheochromocytomas (PH) are tumors of the adrenal medulla.
- Understanding differences between genetically determined and sporadic PH is crucial for diagnosis and treatment.
- Genetic syndromes like MEN IIa, MEN IIb, Von Recklinghausen disease, and von Hippel-Lindau disease are associated with hereditary PH.
Purpose of the Study:
- To compare the clinical and pathological features of genetically determined pheochromocytomas (PH) with sporadic PH.
- To identify distinct characteristics that differentiate hereditary from sporadic forms of the disease.
Main Methods:
- Comparative analysis of 64 genetically determined PH cases (including various genetic syndromes) and 48 sporadic PH cases.
- Evaluation of tumor characteristics such as laterality, multiplicity, invasion, necrosis, differentiation patterns, and cellular morphology.
- Assessment of associated adrenal hyperplasia and immunodetection of PS100 and chromogranin.
Main Results:
- Genetically determined PH were more common in men, frequently bilateral and multicentric, and showed better differentiation (insular pattern, hyaline globules, polyhedric cells).
- Sporadic PH exhibited more frequent adrenal capsular invasion, necrosis, pseudocysts, and a less differentiated, diffuse pattern with small cells.
- Adrenal medullary hyperplasia was significantly linked to genetically determined PH, while adrenal cortical hyperplasia showed no specific association.
Conclusions:
- Significant differences exist in the presentation and histology between genetically determined and sporadic pheochromocytomas.
- These distinctions aid in differentiating hereditary from sporadic PH, potentially influencing management strategies.
- Immunodetection markers PS100 and chromogranin showed similar efficacy in both groups.
Abstract:
The aim of this study was to compare 64 genetically determined pheochromocytomas (PH) (49 MEN IIa, 3 MEN IIb, 6 Von Recklinghausen diseases, 1 von Hippel-Lindau disease, 5 familial pheochromocytomas) and 48 sporadic PH. Genetically determined PH were more often observed among men and more frequently bilateral and multicentric than sporadic PH. Sporadic tumors had more often adrenal capsular invasion, necrosis and pseudocysts. Genetically determined PH were more differentiated with an insular pattern, hyaline globules and a higher percentage of polyhedric cells. Sporadic tumors were less differentiated with more frequently a diffuse pattern and small cells. Adrenal medullar hyperplasia was significantly associated with genetically determined PH. Adrenal cortical hyperplasia was not associated with a particular type of PH. The PS100 and chromogranin immunodetection was equivalent in both groups.