Objective To investig the value of neck lymph dissection in re-operation for differentiated thyroid carcinoma (DTC) and direct the choice of re-operative pattern.Method Re-operation was performed in 122 cases with DTC,of which neck lymph dissection was performed in 88 cases and the clinical data were retrospectively analyzed.Of 88 cases,partial thyroidectomy was performed in 38 cases in the first operation,one lobe plus isthmus excision 16 cases,thyroiddectorny was perfomed in 2 cases,neck lymph nodes biopsy in 32 cases.Results 11 patients suffered from thyroid micro carcinoma.The metastasis rate of neck lymph node were 65.91% (58/88) and residual carcinoma rate was 31.59%(12/38). Conclusions Neck lymph dissection had definite curable effect on re-operation for DTC.Neck lymph dissection should be performed when tumor had involved capsule,enlarged lymph node was palpated in the neck and thyroid micro carcinoma was confirmed.Re-operation was necessary for recurrent thyroid carcinoma.Attention must be paid to the fullresection of recurrent lesions and preserving laryngeal nerve and parathyroid in re-operation.

Objective To study the diagnosis and treatment of primary aldosteronism. Method 507 cases of primary aldosteronism were reviewed. Result Serum potassium was lower in aldosterone producing adenoma (APA) as compared to idiopathic hypersteronism (IHA) (2.35?0.53) mmol/L vs ( 2.94 ? 0.55 ) mmol/L.Aldosterone in serum and 24h urine were higher in APA than in IHA ( 1 027.67 ? 531.84 )pmol/L and (69.25?43.77) mmol/L vs (781.14?310.24)pmol/L and (37.12?9.99) mmol/L.The diagnosis rate on B ultrasonography was 83.9% and on CT 93.1%.The postural stimulation test was more sensitive in IHA and on imaging procedures both the adenals were increased in size or with small nodule.In aldosterone producing adrenocortical carcinoma (APC),there were pronounce increase of cortisol and dehydroisoandrosterone and the tumor size was usually greater than 5cm.APA and APC should be treated surgically but the prognosis was only favorable for APA not for APC.IHA should be treated medically. Conclusion Serum and urine aldosterone were significantly higher in APA and serum potassium lower than in IHA.Postural stimulation test,B ultrasonography and CT were helpful to the diagnosis of APA.In patients with a single APA especially complicated by adrenal atrophy,partial adnalectomy of the affectd side is indicated whereas total adrenalectomy of the affected side is mandatory if the APA is multiple or there is adrenal hyperplasia.

OBJECTIVETo select and identify ssDNA aptamers specific to Streptococcus mutans strains with different cariogenicity isolated from clinical specimens.

METHODSSubtractive SELEX technology targeting the whole intact cells was used to screen for ssDNA aptamers specific to the clinical isolates Streptococcus mutans strains with different cariogenicity. Radioactive isotope, flow cytometry, gene cloning and sequencing, MEME online software and RNA structure analysis software were employed to analyze the first and secondary structures of the aptamers and identify the screened aptamers.

RESULTSDetection by radioactive isotope showed sufficient pool enrichment after 9 rounds of subtractive SELEX. Flow cytometry showed that the selected aptamers H1, H16, H4, L1, L10 and H19 were capable of binding specifically with highly cariogenic Streptococcus mutans strains but not with strains with a low cariogenicity. The aptamer H19 had the strongest binding capacity to highly cariogenic Streptococcus mutans strains, with a dissociation constant of 69.45∓38.53 nmol/L.

CONCLUSIONWe have obtained the ssDNA aptamers specific to the clinical isolates of highly cariogenic Streptococcus mutans strains.

Aptamers, Nucleotide ; genetics ; Cloning, Molecular ; DNA Primers ; Dental Caries ; microbiology ; Gene Library ; Humans ; Nucleic Acid Conformation ; SELEX Aptamer Technique ; Species Specificity ; Streptococcus mutans ; classification ; genetics ; isolation & purification