The Hayman technique: a simple method to treat postpartum haemorrhage

Of the several uterine compression sutures described in more recent years to treat postpartum haemorrhage (PPH), the Hayman suture offers the potential advantages that can be applied faster and easier, avoiding the performance of a lower segment hysterotomy when PPH follows a vaginal delivery. Data on efficacy and safety are limited, and long-term follow-up information are lacking. We report our experience with the Hayman suture in 11 consecutive women with massive PPH. Of these, ten were successfully treated without further interventions. One woman ultimately required a hysterectomy. Postoperative course was uncomplicated in all the cases. The median follow-up time was 11 months (range 1-19). One woman conceived spontaneously 10 months after the procedure. Our results suggest that the Hayman suture is an effective and safe treatment for PPH.

Laparoscopic uterosacral ligaments plication for the treatment of uterine prolapse

OBJECTIVE

To present preliminary results of a simple, minimally interventional, uterus-sparing procedure for uterine prolapse repair.

METHODS

This prospective study was undertaken on women with symptomatic uterine prolapse >/=2nd stage, who declined hysterectomy at the time of prolapse surgery. A 10 mm laparoscope and three 5 mm ancillary trocars were used to perform the procedure. The uterosacral ligament was invested with a nonabsorbable suture. A total of three helical type sutures were placed full-thickness in the uterosacral ligament, beginning in the distal third of the ligament. The ends of the suture were tied with an extra-corporeal knot-tying technique on each side, thus shortening the ligaments. Finally, the round ligaments were plicated to restore the uterus to its correct anatomic position. No additional surgical procedure was performed concomitantly.

RESULTS

Ten patients underwent laparoscopic uterosacral ligaments plication for the treatment of symptomatic uterine prolapse. The median (range) patients age was 45.5 years (36-66). Five (50%) patients were premenopausal and 3 (60%) had not completed their family. The median operating time was 22.5 min (20-45). No intraoperative complications occurred. The median follow-up time was 21 months (range 15-33). The median postoperative difference in POP-Q point C was -3 cm (range 0 to -5). Eight (80%) patients were objectively cured at the last follow-up evaluation and all of them reported a complete resolution of their symptoms. Two women had prolapse recurrence and underwent vaginal hysterectomy 7 and 24 months after primary surgery, respectively.

CONCLUSION

Laparoscopic uterosacral ligaments plication is a minimally invasive and straightforward simple procedure that appears to be a safe and effective treatment option for women with uterovaginal prolapse who desire uterine preservation.

Prophylactic single-dose prulifloxacin for catheter-associated urinary tract infection after tension-free vaginal tape procedure

The purpose of the study was to evaluate whether antibiotic prophylaxis with a single dose of prulifloxacin after tension-free vaginal tape (TVT) procedure decreases catheter-associated urinary tract infections (UTIs). Patients undergoing TVT procedure receiving a single dose of prulifloxacin (600 mg) 10 h before catheter removal (n=54) were compared with historical controls who have had no treatment (n=60). All patients had an indwelling urethral catheter in situ for 24 h. Urine specimens for culture were collected preoperatively, before Foley removal, and 7 days postoperatively in both groups. Main outcome measures were significant bacteriuria and symptomatic UTI at catheter removal and 1 week postoperatively. No patient had a positive urine culture in the prulifloxacin group compared with 14 (23.3%) in the control group at catheter removal (P=0.0001). Ten out of 14 (71.4%) women with a positive catheter urine culture had a symptomatic UTI. One week after surgery no difference was found in the rate of significant bacteriuria between groups. Our data suggest that a prophylactic single dose of prulifloxacin could help to reduce the rate of symptomatic and asymptomatic UTIs after short-term urethral catheterization in women undergoing TVT procedure.

Left–right asymmetry in pelvic lymph nodes distribution: Is there a right-side prevalence?

OBJECTIVE

To assess whether pelvic lymph nodes have a left-right asymmetric distribution.

STUDY DESIGN

The oncologic databases of two gynecologic academic departments were used to identify consecutive patients undergoing pelvic systematic lymphadenectomy as part of the treatment for a variety of gynecologic malignancies. All procedures were carried out in a standardized fashion. Lymph node counts were retrieved from pathological reports.

RESULTS

Four hundred and twenty-eight women underwent pelvic lymphadenectomy during the study period. The median lymph node count was higher on the right side than on the left side [10 (0-33) versus 8 (0-29); P<0.0001]. A prevalence of right-sided nodes was found in 265 (61.9%) patients, while in 44 (10.3%) cases pelvic nodes were equally distributed on the two sides. The right-sided prevalence was significantly higher than the expected 50% in each type of malignancy and surgical technique subgroup. The right-sided prevalence was statistically significant even when the analysis was performed for different nodal groups [external iliac nodes: 5 (0-23) versus 4 (0-13), P=0.005; hypogastric and obturator nodes: 6 (0-17) versus 5 (0-19), P=0.04]. Moreover, nodal count was higher on the right than on the left in obese [10 (1-33) versus 8 (1-26), P=0.0002] and nonobese women [10 (0-32) versus 9 (0-29), P<0.0001].

CONCLUSION

Our findings suggest the existence of a left-right asymmetry in pelvic lymph nodes distribution, with right-sided prevalence.

Laparoscopic-assisted vaginal hysterectomy versus total laparoscopic hysterectomy for the management of endometrial cancer: a randomized clinical trial

STUDY OBJECTIVE

To compare laparoscopic-assisted vaginal hysterectomy (LAVH) and total laparoscopic hysterectomy (TLH) for the treatment of endometrial cancer.

DESIGN

Randomized, controlled trial.

DESIGN CLASSIFICATION

Randomized controlled trial (Canadian Task Force classification I).

SETTING

Two gynecologic oncologic units of university hospitals.

PATIENTS

Seventy-two women with endometrial cancer randomized to undergo either LAVH or TLH.

INTERVENTIONS

Total laparoscopic hysterectomy or laparoscopic-assisted vaginal hysterectomy, bilateral salpingo-oophorectomy, peritoneal washing, and systematic pelvic lymphadenectomy.

MEASUREMENTS AND MAIN RESULTS

Parameters of technical feasibility (operating time of hysterectomy phase, estimated blood loss, perioperative complications) were considered as major statistical endpoints. Thirty-seven women were allocated to the LAVH arm, and 35 were allocated to the TLH arm. Mean total operating time was significantly shorter in the TLH than in the LAVH group (184.0 +/- 46.0 vs 213.2 +/- 39.4 minutes, p = .003). The hysterectomy phase was longer in the LAVH than in the TLH group only in overweight (77.9 +/- 9.8 vs 68.1 +/- 9.3 min, p = .005) and obese patients (87.7+/- 13.1 vs. 62.1+/- 9.9 min, p < .0001). The median estimated blood loss during hysterectomy was similar between groups. Intraoperative complications occurred in three (8.1%) patients in the LAVH group and in one patient (2.8%) in the TLH group (p = .61). No difference was found in the postoperative complication rate between women undergoing LAVH and those who had TLH (24.3% vs 17.1%, p = .56). Within a median follow-up period of 10 months (range 3-17 months), 2 patients in the LAVH group developed recurrent disease. No port site metastasis and no vaginal cuff recurrence were detected in either group.

CONCLUSION

Both LAVH and TLH can be performed successfully to manage endometrial cancer, with similar surgical outcomes. Obese patients benefit more from TLH than from LAVH in terms of shorter operating time.

Laparoscopic management of endometrial cancer in nonobese and obese women: A consecutive series

STUDY OBJECTIVE

To assess the technical feasibility and surgical outcome of a 5 mm-ports technique in a consecutive series of women with endometrial cancer laparoscopically managed.

DESIGN

Prospective collaborative cohort study (Canadian Task Force classification II-2).

SETTING

Two gynecologic oncology units of university hospitals.

PATIENTS

A series of consecutive patients undergoing laparoscopic hysterectomy, bilateral salpingo-oophorectomy, and pelvic lymphadenectomy for the treatment of endometrial cancer.

INTERVENTIONS

A 10-mm zero-degree umbilical operative laparoscope and three 5-mm suprapubic trocars were used. The lymph nodes were removed with the use of a specimen bag through the umbilical port. Intraoperative and postoperative details and complications were prospectively collected.

MEASUREMENTS AND MAIN RESULTS

A total of 101 patients were enrolled. Twenty-two (21.8%) had a body mass index (BMI) of 30 kg/m2 or higher, and nine (8.9%) were severely obese (BMI > or =35 kg/m2). One hundred procedures (99%) were carried out entirely with only three 5-mm ancillary trocars. In one patient, a 5-mm trocar was replaced with a 10-mm trocar because of a lesion of the external iliac vein requiring the placement of vascular clips. One procedure needed to be converted to laparotomy. Intraoperative complications occurred in three patients (one bladder injury and one iliac vein injury, both managed laparoscopically, and one subcutaneous emphysema). Postoperative complications occurred in 10 (10%) patients. The only complication requiring a subsequent intervention was a symptomatic pelvic lymphocyst. No difference was found in surgical outcomes between obese women and those of ideal BMI.

CONCLUSION

The use of only 5-mm ancillary trocars for the laparoscopic treatment of endometrial cancer can further minimize surgical invasiveness without compromising surgical efficacy and safety in patients with high BMI as well as for women with ideal BMI.

Fetal thymic involution: a sonographic marker of the fetal inflammatory response syndrome

OBJECTIVE

The purpose of this study was to evaluate whether there is a relationship between the sonographic fetal thymus size and the presence of an intrauterine infection in patients with preterm labor.

STUDY DESIGN

Thirty-one women who had been admitted with preterm labor and intact membranes between 24 and 32 weeks of gestation were included. Fetal thymus perimeter was measured sonographically, and amniocentesis for the microbiologic assessment of the amniotic cavity was performed. Placentas and umbilical cords were examined for the presence of chorioamnionitis/funisitis.

RESULTS

The prevalence of preterm delivery and intra-amniotic infection was 51.6% (16/31 women) and 32.3% (10/31 women), respectively. In all cases with intrauterine infection and in 23.8% of cases without intrauterine infection, the fetal thymus perimeter was below the 5th percentile for gestational age (10/10 women vs 5/21 women; P < .01). Isolated histologic chorioamnionitis and funisitis were found in 22.6% and 25.8% of fetuses, respectively. The fetal thymus was below the 5th percentile for gestational age in 100%, 71.4%, and 12.5% of patients with histologic signs of funisitis and isolated chorioamnionitis and without histologic signs of infection, respectively.

CONCLUSION

Fetal thymus involution in preterm labor patients is strongly associated with funisitis, which is the histologic manifestation of the fetal inflammatory response syndrome.

Minimizing ancillary ports size in gynecologic laparoscopy: A randomized trial

STUDY OBJECTIVE

To evaluate the feasibility, safety, and effect on postoperative pain of laparoscopy for the management of adnexal masses by downsizing ancillary trocars from 5- to 3-mm.

DESIGN

Randomized, controlled trial (Canadian Task Force classification I).

SETTING

Gynecologic department of a university hospital

PATIENTS

A total of 102 women with an adnexal mass scheduled for gynecologic laparoscopic procedures were randomized to undergo laparoscopy using either conventional 5-mm ancillary trocars (n=52) or 3-mm instruments (n=50). Preoperative suspicion of malignancy, deep infiltrating endometriosis, and indications for hysterectomy or myomectomy were considered as exclusion criteria.

INTERVENTIONS

Laparoscopic procedures for the treatment of benign adnexal masses.

MEASUREMENTS AND MAIN RESULTS

Both groups were similar in patient age, body mass index, history of abdominal surgery, and type of procedures. Intraoperative complications occurred in no patient (0%) in the 3-mm group and in two patients (3.8%) in the 5-mm group (p=.49). Conversion from 3- to 5-mm instrumentation was necessary in one procedure. No difference was found in the operative time between the 3-mm and the 5-mm groups (54 min [range 15-175 min] vs 50 min [range 20-150 min], p=.89). The severity of incisional pain was evaluated with a 100-mm visual analog scale at 1, 3, and 24 hours after surgery. Postoperative pain was significantly lower in the 3-mm than in the 5-mm group 1 hour after laparoscopy (20 [range 0-60] vs 32.5 [range 0-80], p=.04). The proportion of women requiring analgesia before discharge, the timing of analgesic requirement, and the total amount of medication in the first 24 hours after surgery were similar in the two groups.

CONCLUSION

Three-millimeter ancillary trocars can safely replace traditional-size equipment for the management of adnexal masses without a negative impact on the surgeon's ability to perform gynecologic laparoscopy and are associated with less immediate postoperative pain.

Tension-free vaginal tape for the treatment of urodynamic stress incontinence with intrinsic sphincteric deficiency

The purpose of this study was to evaluate the outcome of tension-free vaginal tape (TVT) procedure in women with urodynamic stress incontinence diagnosed as having intrinsic sphincteric deficiency (ISD). The combination of a maximal urethral closure pressure < 20 cm H2O and a Valsalva leak point pressure < 60 cm H2O was considered as diagnostic of ISD. Subjects with detrusor overactivity on preoperative urodynamics were excluded. A total of 35 patients with both low closure pressure and leak point pressure were enrolled. Bladder perforation occurred in three (8.6%) cases. Postoperative urinary voiding difficulties occurred in nine (25.7%) women. Two patients underwent surgical detension of the tape, with complete resolution of urinary retention and no relapse of incontinence. Women with postoperative voiding dysfunction had a significantly lower detrusorial pressure at the peak flow on preoperative urodynamics compared to those who voided efficiently after TVT. The mean (range) follow-up time was 12.5 months (3-36). The objective cure rate for stress incontinence was 91.4%. Two of the three (66%) patients in whom the TVT procedure failed had a fixed urethra. De novo urge incontinence was found in five (14.3%) patients.

Impact of tension-free vaginal tape on sexual function: results of a prospective study

The purpose of this study was to prospectively assess the impact of a TVT insertion for the treatment of stress urinary incontinence (SUI) on coital incontinence and overall sexual life. Sexually active women with pure SUI and without concomitant pelvic organ prolapse scheduled for TVT procedure completed a sexual function questionnaire at baseline and 6 months after surgery. Fifty-three patients were enrolled. Preoperatively 23 (43.4%) women experienced urine leakage during intercourse, 21 (91%) during penetration and 2 (9%) on orgasm. The objective cure rate for SUI was 98%. Coital incontinence was cured in 20 of 23 patients (87%). Thirty-three (62.2%) women reported no change in sexual function after surgery and 18 (34%) reported an improvement. Of the latter, 17 (94%) were of those cured from coital incontinence. No significant difference in the incidence of dyspareunia was found postoperatively. Two patients (3.8%) reported intercourse to be worse following surgery, one because of a vaginal erosion and one cited de novo anorgasmia as the main reason.

Immunohistochemical detection of fibroblast growth factor receptors in normal endocrine cells and related tumors of the digestive system

Endocrine tumors (ETs) of the digestive system produce several growth factors including acidic and basic fibroblast growth factors (aFGF and bFGF, respectively), which are thought to be involved in the growth of tumor cells and in the proliferation of tumor stromal cells. Their actions depend on binding to four specific receptors--FGFR1, FGFR2, FGFR3, and FGFR4--whose distribution in normal endocrine cells and related tumors of the gastroenteropancreatic (GEP) system has previously been examined. Formalin-fixed, paraffin-embedded normal tissues and 60 well-characterized GEP endocrine tumors were immunostained using specific antibodies directed against various GEP hormones, aFGF, FGFR1, FGFR2, FGFR3, and FGFR4. Acidic FGF immunoreactivity (IR) was found in gut EC cells; FGFR1 immunoreactivity in rare duodenal endocrine cells and in pancreatic A cells; FGFR2 immunoreactivity in gastric and duodenal G cells, pancreatic B cells, and rectal EC cells; FGFR3 immunoreactivity in duodenal G cells; and FGFR4 immunoreactivity in rectal L cells and in pancreatic B, PP, and A cells. Immunoreactivity for at least one of the four FGFRs was found in all tumors, independently of FGFR expression in the putative cell of origin. EC cell tumors, which were all positive for aFGF, were found to express at least three different FGFRs. FGFRs also were localized in the stromal cells of all the tumors examined. The tumor stroma was more abundant in EC cell tumors than in other types of neoplasms. The results suggest that aFGF-FGFR interaction may be involved in the modulation of normal endocrine cell functions and in the regulation of tumor growth and stromal proliferation of EC cell carcinoids.

[Diagnostic criteria and classification of gastro-intestinal pancreatic endocrine tumors]

In this presentation the gastrointestinal pancreatic endocrine tumors (ETs) are subdivided into well differentiated ETs and poorly differentiated ETs. Well differentiated ETs are subclassified into ETs with benign behavior, ETs with uncertain behavior and well differentiated endocrine carcinomas. The criteria allowing a distinction among these main types of neoplasms are listed according to the site of origin of the ETs. In addition, the main functional types of ETs of the pancreas, stomach, duodenum, jejunum, ileum, appendix and large bowel are briefly described.

Localization of inhibin/activin subunits in normal pituitary and in pituitary adenomas

The localization of inhibin/activin (I/A) subunits was investigated in human normal adenohypophysial cells and in 87 pituitary adenomas of different types, using immunohistochemistry. Monoclonal antibodies directed against alpha, beta A and beta B subunits of I/A were employed. In normal pituitary, alpha subunit of inhibin was detected only in FSH-positive gonadotrophs, while beta A subunit of I/A was expressed in FSH-positive gonadotrophs, GH-cells and in a few PRL-cells. beta B subunit was found in FSH-positive gonadotrophs, TSH-cells and a few LH-positive gonadotrophs. The three subunits of I/A were detected in the majority of nonfunctioning tumors, while functioning adenomas showed a significantly lower expression. This study shows that alpha, beta A and beta B subunits of I/A are expressed by specific adenohypophysial cell types and that they are characteristically present in nonfunctioning adenomas. These results suggest that inhibins and activins may play a role in the local regulation of pituitary hormonal secretion both in normal adenohypophysial cells and in pituitary adenomas.

Mixed mucus-secreting and oncocytic carcinoma of the thyroid: pathologic, histochemical, immunohistochemical, and ultrastructural study of a case

We report a carcinoma that is, to the best of our knowledge, the first case of a mixed mucus-secreting and oncocytic carcinoma of the thyroid. We also describe the histochemical, immunohistochemical, and ultrastructural features of this tumor. A 59-year-old man complaining of severe bone pain and weight loss underwent clinical and radiologic investigations. The studies revealed a nodule in the left thyroid lobe that was "cold" by (131)I scintiscan and multiple lytic lesions of the skeleton that showed increased uptake by (99m)Tc-Sestamibi scintiscan. Left hemithyroidectomy was performed and the surgical specimen contained a well-circumscribed nodule of 3 cm in the greatest diameter. Light microscopy showed an oncocytic carcinoma with an area of glandular and papillary proliferation of mucin-producing cells. A double histochemical approach (Alcian blue-periodic acid-Schiff and Alcian blue-high-iron diamine) combined with ultrastructural investigation confirmed the presence of true mucus, ruling out the presence of breakdown products of thyroglobulin. Ultrastructural and immunohistochemical studies, together with clinical findings, excluded a possible metastatic origin of the mucin-producing component.

Detection of gonadotropin-releasing hormone receptor in normal human pituitary cells and pituitary adenomas using immunohistochemistry

Gonadotropin-releasing hormone (GnRH), which is a well-known regulator of gonadotroph function, has recently been considered to be a paracrine factor involved in the control of somatotroph, lactotroph, and corticotroph cells. GnRH action is initiated by binding to a specific cell surface receptor, the gonadotropin-releasing hormone receptor (GnRHR), which is expressed by follicle-stimulating hormone/luteinizing hormone (FSH/LH) cells. Using in situ hybridization techniques, GnRHR messenger ribonucleic acid (mRNA) has recently been detected in normal human anterior pituitary gland and in various pituitary adenomas, including FSH/LH-cell, growth hormone (GH)-cell, adrenocorticotropic hormone (ACTH)-cell, and null-cell adenomas. However, immunohistochemical studies indicating the specific cell distribution of GnRHR in normal pituitary cells have never been reported. The aim of the present investigation was to evaluate the immunohistochemical expression of GnRHR in different types of normal pituitary cells and related tumors. Using double-label immunohistochemical techniques on formalin-fixed and paraffin-embedded tissues and specific antibodies directed against pituitary hormones and GnRHR, we found GnRHR immunoreactivity not only in FSH/LH cells, but also in GH- and thyroid-stimulating hormone (TSH) cells. GnRHR was detected in FSH/LH-cell, GH-cell, mixed GH- and prolactin (PRL)-cell, and alpha-subunit (alpha-SU)/null-cell adenomas. The findings of this study suggest that the interaction between GnRH and GnRHR may play a role in paracrine/autocrine regulation of different types of normal pituitary cells and pituitary adenomas.

Mixed endocrine-exocrine tumors of the gastrointestinal tract

Mixed endocrine-exocrine tumors of the gastrointestinal tract are rare neoplasms, which have been reported in the literature mainly as case reports and have been designated with a various and rather confusing terminology. In this review, on the basis of personally studied cases and of the analysis of cases reported in the literature, we have tried to identify types of mixed endocrine-exocrine tumors showing different clinicopathologic and biological characteristics. We have also tried to group the different clinicopathologic entities in prognostic classes which include: benign, low-grade, intermediate grade, and high-grade malignant mixed endocrine-exocrine tumors. The criteria for identifying the various types of mixed endocrine-exocrine tumors are extensively discussed.

Mixed endocrine-exocrine tumors of the gastrointestinal tract

Mixed endocrine-exocrine tumors of the gastrointestinal tract are rare neoplasms, which have been reported in the literature mainly as case reports and have been designated with a various and rather confusing terminology. In this review, on the basis of personally studied cases and of the analysis of cases reported in the literature, we have tried to identify types of mixed endocrine-exocrine tumors showing different clinicopathologic and biological characteristics. We have also tried to group the different clinicopathologic entities in prognostic classes which include: benign, low-grade, intermediate grade, and high-grade malignant mixed endocrine-exocrine tumors. The criteria for identifying the various types of mixed endocrine-exocrine tumors are extensively discussed.

Immunohistochemical localization of alpha- and betaA-subunits of inhibin/activin in human normal endocrine cells and related tumors of the digestive system

Activin A and inhibin A, first isolated from the ovary, are dimeric proteins able to modulate pituitary FSH secretion. Inhibin A is a heterodimer composed of one alpha-subunit and one betaA-subunit (alpha-betaA), while activin A is a homodimer of the betaA-subunit (betaA-betaA). Their identification in several tissues has suggested that they have numerous physiological functions, acting as either paracrine or autocrine factors. The aim of this study was to evaluate the expression of activin A and inhibin A in normal endocrine cells and in 70 endocrine tumours from different sites in the gastro-entero-pancreatic system, using specific monoclonal antibodies directed against the alpha- and betaA-subunits of inhibin/activin. Immunoreactivity for the betaA-subunit, but not for the alpha-subunit, was observed in normal G, EC, and GIP cells of the antrum and duodenum, and in pancreatic A cells. BetaA-subunit expression was observed in G cell and A cell tumours, and in a few insulinomas and ileal EC cell carcinoids. The alpha-subunit was found in rare cells in 7 of the 70 tumours and was colocalized with the betaA-subunit in only 1 tumor. Specific types of endocrine cells from the gut and pancreas appear to produce only activin A, a possible paracrine or autocrine modulator. Activin A is mainly produced by tumours derived from endocrine cells that normally express it.

High expression of growth factors and growth factor receptors in ovarian metastases from ileal carcinoids: an immunohistochemical study of 2 cases

OBJECTIVE AND DESIGN

Ovarian metastatic carcinoids are rare neoplasms that show prominent fibrosis of tumor stroma and are often associated with peritoneal carcinomatosis. We studied formalin-fixed and paraffin-embedded tumor specimens of 2 cases of ovarian metastases from ileal enterochromaffin cell carcinoids immunohistochemically to evaluate whether acidic fibroblast growth factor (aFGF), transforming growth factor-alpha (TGFalpha), and their respective receptors (fibroblast growth factor receptor-4 [FGFR4] and epidermal growth factor receptor [EGFR]) may play a role in the pathogenesis of stromal fibroblast reaction and in the mechanism of tumor dissemination.

RESULTS

In both cases, the majority of tumor cells expressed immunoreactivity for aFGF, FGFR4, and TGFalpha. Immunoreactivity for FGFR4 was detected in stromal cells of both cases, while EGFR-positive stromal cells were found in only 1 case. Immunoreactivity for FGFR4 was also found in peritoneal mesothelial cells.

CONCLUSIONS

The coexpression of aFGF and FGFR4 in neoplastic enterochromaffin cells suggests that aFGF may act as an autocrine factor stimulating tumor cell growth. In addition, aFGF and TGFalpha may stimulate, in a paracrine fashion, the proliferation of FGFR4- and EGFR-immunoreactive stromal fibroblasts. Finally, interaction of aFGF-immunoreactive enterochromaffin cells with FGFR4-bearing mesothelial cells may play a role in the mechanism of serosal implant and spread of tumor cells.

Uptake of In-111 pentetreotide by normally functioning nodular goiters

After the intravenous administration of a radiolabeled somatostatin analogue (octreotide), normal thyroid and neoplastic and nonneoplastic thyroid lesions can be visualized. The authors present the cases of two patients who underwent somatostatin receptor scintigraphy (SSRS) using In-111 pentetreotide: one for the study of suspected paraneoplastic ACTH hypersecretion, and the other for a restaging of breast carcinoma with neuroendocrine features. In both patients, SSRS revealed increased uptake in the thyroid, corresponding to "cold" nodules on Tc-99m pertechnetate imaging. Cytologic and histologic examinations showed the typical features of thyroid goiters without lymphocytic infiltration.

Immunohistochemical localization of acidic fibroblast growth factor in normal human enterochromaffin cells and related gastrointestinal tumours

Acidic fibroblast growth factor (aFGF) is a member of the structurally related heparin-binding growth factor family. The best studied members of this family are aFGF and basic FGF (bFGF), which are potent mitogens and differentiation factors for mesoderm-derived cells, including fibroblasts. This study was designed to verify the immunohistochemical expression of aFGF in normal human endocrine cells of the gut and in related endocrine tumours. We examined normal gastrointestinal mucosa from seven different subjects and 41 gut endocrine tumours from different sites, including stomach, duodenum, and small and large intestine, using an aFGF polyclonal antibody with no cross-reactivity for bFGF. We localized aFGF in a fraction of serotonin-producing enterochromaffin (EC) cells of the normal gut, while it was absent in gastrin (G), CCK, secretion (S), somatostatin (D) and glicentin (L) cells. aFGF immunoreactivity was also expressed in serotonin producing EC cell tumours, but not in other functional types of gut endocrine neoplasms investigated, including gastric ECL cell, duodenal somatostatin and gastrin cell, and rectal L cell tumours. A positive correlation was found between expression of aFGF and the amount of tumour fibrous stroma, suggesting that aFGF may be involved in proliferation and activity of stromal fibroblasts.