The highest Fuhrman and WHO/ISUP grade influences the Ki-67 labeling index of those of grades 1 and 2 in clear cell renal cell carcinoma

Immunohistochemical expression of cytochrome P4A11 (CYP4A11), carbonic anhydrase 9 (CAIX) and Ki67 in renal cell carcinoma; diagnostic relevance and relations to clinicopathological parameters

BACKGROUND

Cytochrome P4A11 (CYP4A11) is a member of cytochrome p450 family, which is involved in arachidonic acid metabolism that participates in promoting malignant cell proliferation, progression, and angiogenetic capacity. Carbonic Anhydrase 9 (CAIX) is a transmembrane protein that plays an integral part in regulating hypoxia which affects cancer cell metabolism, proliferation and promotes metastasis. The aim of this study was to evaluate the immunohistochemical expression of CYP4A11, CAIX and ki67 in RCC subtypes in relation to clinicopathological parameters and to evaluate the diagnostic significance of CYP4A11 and CAIX in differentiating renal cell carcinoma (RCC) subtypes.

MATERIALS AND METHODS

one hundred primary RCC cases, collected from Pathology Department, Faculty of Medicine, Tanta University and from private laboratories, were evaluated for immunohistochemical expression of CYP4A11, CAIX and ki67.

RESULTS

CYP4A11 was expressed in 59% of RCC; with 91.7% sensitivity and 90% specificity in differentiating clear cell and non-clear cell subtypes. CAIX was expressed in 50% of RCC; with 95% sensitivity, 80% specificity. High expression of CYP4A11 was statistically positively associated with higher tumor grade, high expression of CAIX was statistically positively associated with lower tumor grade and absence of necrosis and high ki67 labeling index was significantly associated with clear cell subtype, larger tumor sizes, higher tumor grade, advanced tumor stage, fat invasion and vascular invasion.

CONCLUSIONS

CYP4A11 and CAIX can be used as diagnostic markers to differentiate clear cell RCC from other subtypes. CYP4A11 is more diagnostically accurate and specific than CAIX. High expression of CYP4A11, low CAIX expression and high ki67 labeling index were related to features of aggressive tumor behavior.

Dynamic contrast-enhanced ultrasound characteristics of renal tumors: VueBox™ quantitative analysis

BACKGROUND

VueBoxtrademark has been used for contrast analysis in DCE-US-based quantitative research.

OBJECTIVE

Aim of this study was to use the enhancement-mode and VueBoxtrademark parameters to further evaluate the differential diagnostic value of DCE-US for renal tumors.

METHODS

24 patients with renal tumors, including 7 benign and 17 malignant, were retrospectively analyzed.The DCE-US enhancement-mode and VueBoxtrademark parameters correlated with the histological analyses of tumors were obtained and analyzed.

RESULTS

The benign and malignant renal tumors showed significant differences in enhancement degree (P = 0.017) and presence of a pseudocapsule (P = 0.009) and in the VueBoxtrademark parameters FT (P = 0.045) and RT (P = 0.039). Receiver operating characteristic analysis for differential diagnosis of benign and malignant renal tumors showed that AUC for a combination of enhancement degree and presence of a pseudocapsule was greater (AUC = 0.815) than the values for either parameter of enhancement mode alone. Similarly, the AUC for a combination of RT and FT was greater (AUC = 0.798) than the values for RT or FT alone. A comprehensive index obtaining by combining the enhancement-mode and VueBoxtrademark parameters showed the largest AUC (AUC = 0.916) with relatively high accuracy (87.50%), sensitivity (76.50%), and specificity (85.70%).

CONCLUSIONS

DCE-US with enhancement mode and quantitative analysis can facilitate preoperative differential diagnosis of benign and malignant renal tumors.

Giant androgen-producing adrenocortical carcinoma with atrial flutter: A case report and review of the literature

BACKGROUND

Adrenocortical carcinoma (ACC), the second most aggressive malignant tumor, lacks epidemiological data worldwide; therefore, every new case can improve the understanding of the pathology and treatment of this malignancy.

CASE SUMMARY

We present the case of a 66-year-old Caucasian woman with a giant androgen-producing ACC (21 cm × 17 cm × 12 cm; 2100 g), without metastases, which unusually presented with an acute onset of atrial flutter and congestive heart failure. The cardiac complications observed in our case support the hypothesis that androgen excess in women is a cardiovascular risk factor. Androgen excess in women can be a rare cause of reversible dilated cardiomyopathy, therefore a comprehensive approach to the patient is essential to improve the recognition of androgen-secreting ACC. The atrial flutter was remitted after initiation of drug treatment during admission. The severe heart failure was totally remitted at 6 mo after radical open surgery to remove the giant ACC.

CONCLUSION

Radical open surgery to remove a giant androgen-producing ACC was the first-line treatment to cure the excess of androgen, which determined the total remission of cardiac complications at 6 mo after surgery in the women of this case report.