A better overall survival (OS) for total (ipsilateral) retroperitoneal lipectomy than standard complete resection in patients with retroperitoneal liposarcoma: a comparative multi-institutional study.

Background: Complete resection (CR) serves as the standard of surgical treatment for retroperitoneal liposarcoma (RPLS). Unfortunately, even at referral centers, recurrence rates are high, and CR may not address multifocal diseases, which are a common phenomenon in RPLS. We sought to retrospectively compare the clinical outcomes of RPLS patients treated with total (ipsilateral) retroperitoneal lipectomy (TRL) and CR. Because TRL remove potentially multifocal tumors in the fat, patients may have a better prognosis than CR. Methods: Patients with primary/first-recurrent RPLS who had been treated at 5 referral centers were recruited from December 2014 to June 2018. Multivariable Cox regression analyses were conducted to determine the effects of demographic, operative, and clinicopathological variables on the following primary endpoints: local recurrence (LR), local recurrence-free survival (LRFS), and overall survival (OS). Results: A total of 134 patients were enrolled in this retrospective study, 53 of whom underwent TRL, and 81 of whom underwent CR. The 2 groups were comparable in terms of age, gender, presentation (primary vs. first-recurrent RPLS), number of tumors (unifocal vs. multifocal) at presentation, and Fédération Nationale des Centres de Lutte Contre le Cancer (FNCLCC) grade. The TRL group had higher levels of preoperative hemoglobin (Hb) (13 vs. 12.5 g/dL; P=0.008) and a lower amount of intraoperative blood loss (400 vs. 500 mL; P=0.034), but there were no significant differences in the length of hospital stay (23 vs. 22 d; P=0.47) or complications (32 vs. 30; P=0.82) between the 2 groups. In a subset of patients with multifocal tumors at initial presentation, OS was more prolonged in those treated with TRL than those treated with CR (P=0.0272). Based on the multivariable analysis, primary liposarcoma and a low FNCLCC grade were associated with decreased LR and improved OS. Conclusions: TRL is a safe procedure that positively affects the OS of patients with multifocal RPLS. This novel strategy deserves further investigation in prospective studies.

Matrix effects in analysis of ß-agonists with LC-MS/MS: influence of analyte concentration, sample source, and SPE type.

The synergistic influences of analyte concentration, sample source, and solid-phase extraction (SPE) type on matrix effects in the multiresidue analyses of eight ß-agonists with LC-ESI-MS/MS were evaluated. Porcine muscle and liver extracts and urine from diverse sources were purified by strong or mixed-mode cation exchange and molecularly imprinted polymer SPE cartridges, respectively. Three spiked concentrations (2, 10, and 20 ng/mL) of eight ß-agonists in the purified matrices and the different sample sources were analyzed. The results show that for most ß-agonists there are significant differences in matrix effects between analyte concentrations or sample sources (P < 0.05), whereas there is no significant difference in matrix effects between different SPE cartridges (P > 0.05). Results from main effects testing indicated that analyte concentration was the main effector.

[Symptomatic evaluation of late onset hypogonadism in healthy Chinese men].

OBJECTIVE: To investigate the correlation between the symptoms and serum levels of androgen in healthy Chinese men aged over 40 years, and to work out a new symptomatic inventory for screening late onset hypogonadism (LOH) in Chinese men. METHODS: An 18-item questionnaire was designed and 637 respondents were collected from Beijing, Shanghai, Xi'an and Chongqing. Serum total testosterone, calculated free testosterone, testosterone secretion index and free testosterone index were measured. An analysis of the correlation between symptoms and androgens was performed. RESULTS: The twelve-item symptoms were significantly correlated to 2 or more of the 4 androgens mentioned above, marking up a new symptomatic inventory for screening LOH, with a 70% sensitivity and 46% specificity. CONCLUSION: The new symptomatic inventory is acceptable for the screening purpose. The relatively low specificity may be related to the individual response to the decline of serum androgens and age-related changes of other hormones, such as GH-IGF-1 axis, DHEA, thyroid hormones, melatonin and leptin.

[Clinicopathological study on nodal molecular staging of non-small-cell lung cancer].

OBJECTIVE: To investigate the practicability of detecting the micrometastasis in lymph nodes of no-small-cell lung cancer (NSCLC) by means of reverse transcriptase-polymerase chain reaction (RT-PCR). METHODS: Regional lymph node samples were collected during operation from 25 patients with NSCLC randomly selected. The lymph node sample from each patient was divided into 2 groups: lymph nodes of hilum of lung and of mediastinum. Every lymph node was divided into two parts of the same size. One half part of the lymph node was examined by hematoxylin eosin (H&E) staining. If HE staining discovered metastasis, further examination was not needed. If HE staining failed to discover metastasis, then all the remaining lymph node samples of each patient were mixed together to undergo RT-PCR for cytokeratin 19 (CK(19)), a tissue marker of epithelium and epithelial tumors. RESULTS: (1) 195 lymph nodes from 25 patients with NSCLC were examined by H&E staining. 30 lymph nodes in 9 patients showed gross nodal metastasis and none showed micrometastatic tumor cells. (2) Of the 39 groups of mixed regional lymph node samples which were diagnosed to be devoid of metastases by H&E staining, 11 groups were found to have positive reactions to CK(19) mRNA. (3) Six of the sixteen patients staged as PN(0) had hilum lymph nodal micrometastasis, while 5 of nine patients with stage PN(1) had mediastinal lymph nodal micrometastasis (chi(2) = 54.063, P = 0.0043). CONCLUSION: (1) H&E staining can accurately detect gross nodal metastasis in the lymph nodes of the patients with NSCLC, but is unfit for detecting lymph nodal micrometastasis. (2) RT-PCR can facilitate the detection of occult micrometastatic tumor cells in the lymph nodes of NSCLC, and its assessment of nodal micrometastasis can provide a refinement of molecular stage for partial patients with stage I to II.

[Clinical pathological study on nodal micrometastases of non-small-cell lung cancer].

OBJECTIVE: To investigate the practicability of detecting the micrometastases in lymph nodes of no-small-cell lung cancer (NSCLC) by means of the immunohistochemical (IHC) staining. METHODS: The lymph node samples were taken from the patients with NSCLC during the operations. Firstly, each resulting tissue block was processed for routine paraffin embedding. Then the 6 approximately 10 serial sections were chosen, each 5 microm thick, from every paraffin block of the lymph node. Finally, the first and the second last sections of each lymph node were stained by hematoxylin eosin (HE), and the other serial sections were used for the IHC staining examination with the monoclonal antibody against cytokeratin 19. RESULTS: The paraffin embedded sections of 195 regional lymph nodes from 25 patients with NSCLC were examined by HE staining. Thirty lymph nodes in 9 patients revealed gross nodal metastases, and none of lymph node in 25 patients showed micrometastatic tumor cells. Frozen tissue sections from 135 regional lymph nodes that were staged as free of metastases by HE staining were screened by IHC staining. Thirty-one lymph nodes in 9 patients showed micrometastatic tumor cells. Five of sixteen patients staged as PN(0) had hilum lymph nodal micrometastases, versus four of nine patients with stage PN(1) had mediastinal lymph nodal micrometastases. There was a significant difference between two groups (chi(2)=52.900, P=0.0193). CONCLUSIONS: Conventional HE staining can accurately detect gross nodal metastases in the lymph nodes of patients with NSCLC, but is unfit for detecting lymph nodal micrometastases. IHC staining analysis can significantly facilitate the detection of occult micrometastatic tumor cells in lymph nodes of NSCLC, and its assessment of nodal micrometastases can provide a refinement of TNM stage for partial patients with stage I to II NSCLC.