Metanephric adenoma of kidney: a clinicopathologic study of eight cases / 中华病理学杂志
Chinese Journal of Pathology
; (12): 154-157, 2014.
Article
in Zh
| WPRIM
| ID: wpr-292338
Responsible library:
WPRO
ABSTRACT
<p><b>OBJECTIVE</b>To study the clinical and histopathologic features of metanephric adenoma (MA).</p><p><b>METHODS</b>Eight cases of recently diagnosed MA were retrieved from archival file. Immunohistochemical study was carried out. The clinical characteristics, pathologic parameters, differential diagnosis, treatment options and prognosis of MA were analyzed, with literature review.</p><p><b>RESULTS</b>The patients included 6 females and 2 males. The age of patients ranged from 12 to 70 years (mean=43.6 years). Eight cases were located in renal cortex and showed well-defined borders. Histologically, the tumor was composed of tubules lined by small basophilic cells and embedded in an edematous stroma. Papillary structures and psammoma bodies were focally seen. Immunohistochemical study showed that the tumor cells were positive for PAX2 and vimentin in all the 8 cases. WT-1 was positive in 2 cases, focal and weak in 5 cases, and negative in 1 case. CK-Pan was positive in 3 cases. CK7 staining was mostly negative, with focal and weak positivity only in 1 case. The proliferative index, as highlighted by Ki-67 staining, was less than 2% in 7 cases and focally around 5% in 1 case. The expressions of CK20, CD10, RCC, epithelial membrane antigen, CD56, synaptophysin and chromogranin A were negative. Follow-up information from 7 to 57 months was available in all patients; and none of them developed local recurrence or distant metastasis.</p><p><b>CONCLUSIONS</b>The diagnosis of MA relies primarily on thorough histologic examination and immunohistochemical study (vimentin and PAX2 positive, WT-1 focally and weakly positive in some cases, and low proliferative index). Correlation with clinical and radiologic findings would also be helpful.</p>
Full text:
1
Index:
WPRIM
Main subject:
Pathology
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General Surgery
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Vimentin
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Diagnostic Imaging
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Carcinoma, Renal Cell
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Biomarkers, Tumor
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Tomography, X-Ray Computed
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Adenoma
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Follow-Up Studies
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Wilms Tumor
Type of study:
Diagnostic_studies
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Observational_studies
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Prognostic_studies
Limits:
Adolescent
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Adult
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Aged
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Child
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Female
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Humans
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Male
Language:
Zh
Journal:
Chinese Journal of Pathology
Year:
2014
Type:
Article