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Antônio M Lucon

Publications and source records attributed to Antônio M Lucon.

5 recordsLinked to original sources
PubMed2006

Cigarette smoking is related to a decrease in semen volume in a population of fertile men.

OBJECTIVE: To evaluate the semen quality and hormonal levels in fertile men according to their level of cigarette smoking. SUBJECTS AND METHODS: We evaluated 889 fertile men who came for a vasectomy for sterilization purposes. The men included 522 non-smokers, 143 mild smokers (<10 cigarettes/day), 154 moderate smokers (11-20/day), and 70 heavy smokers (>20/day). We evaluated sperm concentration, motility, motion variables and hormonal levels in these men. RESULTS: There were no significant differences among the groups in sperm concentration or motility, or in levels of follicle-stimulating hormone, luteinizing hormone, or serum total testosterone. Also, sperm motion characteristics did not differ across the groups. Semen volume was the only semen variable which tended to decrease according to the number of cigarettes smoked. CONCLUSIONS: Cigarette smoking had no apparent effect on sperm concentration, motility or reproductive hormonal levels, but tended to reduce semen volume.

Analysis of Variance↗
PubMed2005

Sperm concentration and normal sperm morphology decrease and follicle-stimulating hormone level increases with age.

OBJECTIVE: To assess hormone levels, testicular volume, and semen characteristics of fertile men of various age groups. PATIENTS AND METHODS: The records of 889 men who sought a vasectomy between September 1999 and March 2003 were reviewed. Patients were divided into five groups by age; we evaluated semen volume, sperm concentration, motility, morphology and complex sperm motion variables. Follicle-stimulating hormone (FSH), luteinizing hormone (LH), testosterone levels and both testicular volumes were compared. RESULTS: There were no differences among the groups in the levels of LH, testosterone, or right and left testicular volumes. There were differences among the five groups in FSH levels, semen volume, sperm concentration and motility. Normal morphology according to the World Health Organisation criteria was significantly lower in patients aged > 45 years. From a linear regression analysis, semen volume, sperm concentration and motility decreased by 0.01 mL, 2.1%, and 0.27%, respectively, per year, and the FSH level increased by 0.27%. CONCLUSIONS: Sperm concentration and motility decrease and FSH levels increase with age. Normal sperm morphology decreases from 45 years old. Thus, the ageing effect should be considered when proposing standard values for semen characteristics in routine semen analysis.

Adult↗
PubMed2003

Induction of spermatogenesis in azoospermic men after varicocele repair.

BACKGROUND: The purpose of this study was to assess the treatment outcome after varicocele repair in azoospermic men and to correlate this outcome with the testicular histology patterns. METHODS: Medical records of 15 azoospermic men who underwent testis biopsy and microsurgical repair of clinical varicocele between July 1999 and November 2000 were reviewed. All patients had at least two semen analyses showing azoospermia taken before the surgery and two semen analyses post-operatively. Hypospermatogenesis was identified in four, maturation arrest in six, and germ cell aplasia in five men. RESULTS: Induction of spermatogenesis was achieved in seven men (47%). Of these, four had germ cell aplasia and three had maturation arrest. The improvement in sperm concentration and motility in patients with germ cell aplasia ranged from 1.8 to 7.9 x 10(6)/ml, and from 32 to 76% respectively. Of these seven patients with improvement in semen quality, five relapsed into azoospermia 6 months after the recovery of spermatogenesis (four germ cell aplasia and one maturation arrest). One patient with maturation arrest established a pregnancy. CONCLUSIONS: Azoospermic patients may have an improvement in semen quality following varicocelectomy. Semen samples should be cryopreserved after an initial improvement following varicocelectomy, as relapse to a state of azoospermia may occur.

Adult↗
PubMed2002

Treatment of Peyronie's disease by incomplete circumferential incision of the tunica albuginea and plaque with bovine pericardium graft.

OBJECTIVES: To study the surgical treatment of Peyronie's disease using a single incision in the tunica albuginea and fibrotic plaque and repair of the defect by bovine pericardium graft. METHODS: Between April 1999 and May 2001, 33 patients who had had symptoms of Peyronie's disease for more than 12 months and whose disease had been stable for more than 6 months underwent surgery. The reason for surgery was deformity of the penis that made sexual intercourse, even with erection, difficult or impossible. Two paraurethral incisions were made in Buck's fascia to separate the neurovascular bundle from the tunica albuginea. An incomplete circumferential incision, forked at the extremities, was made in the tunica albuginea and in the plaque at the point of maximal curvature, followed by a septal incision for the lengthening of the short side of the penis. A bovine pericardium graft was used to repair the defect in the tunica. All procedures were performed by a single surgeon (P.H.E.). The average follow-up time was 19.4 months (range 5 to 30). RESULTS: No rejection or retraction of the graft was observed. All patients maintained their state of preoperative erection, with the penis corrected in 87.9% of cases and with discrete curvature (less than 15 degrees ) in 12.1%. All recovered their ability to penetrate with no difficulty. In addition, an intraoperative average increase of 2.21 cm (range 1 to 4) occurred in the size of the penis. CONCLUSIONS: This procedure is effective for all types of penile deformity, regardless of the plaque characteristics.

Adult↗