Fine-needle aspiration cytology of thyroid nodules: experience at the Queen Elizabeth Hospital, Barbados (1998-2002).

Fine-needle aspiration cytology (FNAC) of the thyroid nodule has become part of accepted practice defining the role of surgery. This study assessed a 5-year period comparing cytologic with histopathologic diagnosis in 256 samples from 234 patients (203 women and 31 men). Inadequate cytologic samples were obtained in 21.1% of cases. The sensitivity and positive predictive values for the detection by FNAC of thyroid neoplasms was 21.1% and 30.8%, respectively, with a specificity and negative predictive value of 79.5% and 70.0%, respectively. The overall FNAC accuracy was 61.9%. It is anticipated that improvement in diagnosis will develop from specific cytopathological training in thyroid FNAC, consideration of the cytopathologist performing the aspiration biopsy, and the development of immunohistochemical and molecular techniques applied to the cytologic smears. The principal inherent difficulty with thyroid FNAC is the inability to confidently distinguish hyperplastic follicular adenomas from microinvasive follicular carcinomas.

The changing distribution of colorectal cancer in Barbados: 1985-2004.

PURPOSE: Recent reports have suggested a shift to the right in older female patients of colon cancer. This is believed to be representative of more accessible national endoscopic screening programs. METHODS: We report the demographic shift in colorectal cancer based on an analysis of resection specimens during four five-year time periods from 1985 to 2004 at the University Hospital, Barbados. Differences in population-based colorectal cancer incidence, age, gender, site, stage, and presentation (emergency vs. elective) are analyzed. RESULTS: A total of 1,014 specimens obtained from 993 patients were analyzed, showing a progressive population-based increase in colorectal cancer in Barbados during this 20-year time period. There was an increase in right-sided tumors (P < 0.0001) without a concomitant decline in left-sided tumors. There was a significant increase in Dukes A cancers (P < 0.0001) without gender predilection. During the time period, there was a significant reduction in right-sided tumors presenting as emergencies (P < 0.005) without an effect of stage or gender. CONCLUSIONS: There has been a steady increase in both right-sided and left-sided colonic cancers without gender predilection. The increase in early-stage tumors and reduction in emergency presentations during the latter part of the study suggests value in instituting a formal national colonoscopic screening program to assess its prospective effect on these parameters.

Synchronous mucinous adenocarcinoma of the rectosigmoid seeding onto a pre-existing anal fistula.

Carcinoma within a long-standing fistula-in-ano is rare and may be defined by specific neoplastic involvement of the fistulous track in the absence of rectal mucosal carcinoma. The presence of a carcinoma of mucinous histology occurring synchronously in the perianal region and the colon is exceptionally rare. We present a case with a review of the literature concerning its aetiopathogenesis and treatment. A 72-year-old man with a 2 months history of dark red rectal bleeding and mucus per rectum with alternating constipation and diarrhoea, was observed. Clinical examination and a barium enema showed a perianal fistula and an annular stenosing lesion of the rectosigmoid. Preoperative CT scan confirmed the colonic lesion. Colonic resection and wide fistula excision were performed. Histology showed an adenocarcinoma with a clear resection margins. The fistula also showed a similar histology. Chemoradiation (5-Fluorouracil (425 mg/m2) and Leucovorin (20 mg/m2) with 4500 cGy external beam radiotherapy was utilized. Subsequent clinical follow-up and CT examination of the patient has not revealed recurrent disease at 14 months.

Direct detection of leptospiral material in human postmortem samples.

Leptospiral culture, direct immunofluorescence, and the polymerase chain reaction (PCR) were used to detect leptospiral material in postmortem specimens collected from eight patients who died of leptospirosis. Diagnosis of leptospiral infection was based on clinical summary (premortem) and confirmed by serological analysis and/or culture of leptospires. Leptospiral culture was the least sensitive technique, yielding two isolates (3%) from 65 samples. Both isolates were from the aqueous humour and cerebrospinal fluid of the same patient. Direct immunofluorescence was of intermediate sensitivity for detection of leptospires, confirming the presence of leptospires in 11% (2 of 18) of tissue samples from three patients. PCR analysis was the most sensitive technique for detection of leptospiral material in tissue samples, being positive in 20% (11 of 56) of samples from eight patients. Both samples (cerebellum and liver) positive by immunofluorescence were also positive by PCR. The sensitivity of the PCR assay was 1-10 leptospires ml(-1) sample, and the assay was specific for Leptospira pathogenic species. Multi-system involvement was indicated based on successful amplification of leptospiral DNA from more than one tissue sample, which corroborated with the clinical and pathologic findings. The results suggest that in acute and/or fatal leptospirosis, the pathogenesis of the pathologic features are related to the presence of the organisms in the tissues. In conclusion, PCR combined with serology appears to be a useful tool for diagnosis of leptospirosis and may be invaluable in epidemiological studies.

Analysis of Cervico-vaginal (Papanicolaou) smears, in girls 18 years and under

The study was conducted retrospectively at the Queen Elizabeth Hospital and a private laboratory in Barbados to determine the types of epithelial abnormalities in cervico-vaginal Papanicolaou (Pap)-stained smears, and their clinical implications in Barbadian girls, 18 years and under, during the five-year period January 1995 to December 1999. Two hundred and sixty-five Pap smears from 236 patients were examined and the gynaecological history, initial and repeat Pap smear diagnoses, and histology reports of these patients were analyzed. Of the 236 first-visit smears, 94 (39.8 percent) were abnormal with 36 (15.3 percent) displaying cytological features of squamous intra-epithelial lesions (SIL), (33 low grade and 3 high grade). A diagnosis of atypical squamous cells of undetermined significance (ASCUS) was reported in the remaining 58 (24.5 percent) abnormal smears, of which 35 (60.3 percent) were suspected to be related to human papillomavirus (HPV) infection. Twenty-two (23.4 percent) of these 94 patients, who had abnormal smears of either ASCUS or low grade squamous intra-epithelial lesions (LSIL) were re-evaluated within six to twelve months of the initial abnormal Pap smear diagnosis. Eight of these 22 patients (36.4 percent) had histological diagnosis of LSIL inclusive of cervical intra-epithelial neoplasia grade 1 (CIN 1) and condylomata. High-risk HPV DNA types were detected in two of these eight patients (25 percent). The study confirms that sexually active teenage girls are at risk of developing SIL and high-risk HPV infection. Screening of sexually active teenage girls by Pap smears followed by other appropriate investigative procedures is recommended. (AU)

The significance of atypical squamous cells of undetermined significance in Barbados - Poster abstract

OBJECTIVE: To evaluate the significance of a Papanicolaou (Pap) cervico-vaginal smear diagnosis of atypical squamous cells of undertermined significance (ASCUS) using cytohistologic correlation and to determine the ASCUS squamous intraepithelial lesions (SIL) ratios of five cytopathology laboratories. DESIGN AND METHODS: A combined retrospective and prospective study was undertaken to evalute the histologic diagnoses of the biopsies from patients who attended the colposcopy clinic at the Queen Elizabeth Hospital with the Pap smear cytologic diagnosis of ASCUS during the period, January 1 - April 15, 1998. The laboratory from which the Pap reports were issued was recorded. RESULTS: During this three and a half month period three hundred and sixty-four (364) patients with abnormal smears diagnosed at five different cytology laboratories were investigated. One hundred and fifty (42.1 percent) patients has a Pap smear diagnosis of ASCUS, followed by 161 (46.5 percent) SIL, 130 (35.8 percent) wit low grade intraepithelial lesions (LSIL) and 31 (10.7 percent) high grade intraepithelial lesions (HSIL). Three cases with ASCUS were subsequently excluded from the study because of insufficient data. The histologic diagnosis of the remaining 147 biopsies from patients with the Pap smear diagnosis of ASCUS were LSIL 49 (33.6 percent), HSIL 9 (6.2 percent), atypia/metaplasia 66 (45.2 percent) and inflammation/normal 23 (15.1 percent). The overall ASCUS/SIL ratio was 0.90 and the individual laboratory ratios ranged from 0.25 to 1.70 with a mean of 0.84 ñ 0.63. CONCLUSION: The histologic diagnosis of a cervical cytologic smear assessed as ASCUS may vary from normal to HSIL. Just under 40 percent are likely to be SIL with LSIL predominant. The ASCUS/SIL ratios of Barbadian cytopathology laboratories are less than the ASCUS/SIL ratio (2.0-3.0) suggested by the 1992 NCI Workshop at Bethesda. Hence a diagnosis of ASCUS in Barbados requires careful follow-up.(AU)

Cotyledonous leiomyoma, a rare variant of uterine leiomyoma: case report

A postmenopausal woman admitted to Bayview Hospital for total abdominal hysterectomy for uterine leiomyoma had unusual frond-like vascular excrescences on the anterior wall. These were biopsied, a subtotal hysterectomy was subsequently performed and cotyledonous leiomyoma, a rare and unusual form of uterine leiomyoma, was diagnosed. The macroscopic and microscopic features were presented.(AU)

An analysis of cervico-vaginal (Papanicolaou) smears in girls 18 years and under

During the two year period, January 1995 to December 1996 124 cervico-vaginal smears from 109 girls 18 years old and younger were examined. The gynaecological history, cytology reports, histological and cytological follow-up reports were analyzed to determine the demographics, common infections, epithelial abnormalities and follow-up management in this age group. The mean age was 17.4 with a range of 15-18 years. Twenty-five percent were gravid and 4.5 percent multigravida. The teen delivery/termination ratio was 0.73:1. The most common specific infection was yeast and, suspected infection, HPV .39 percent had normal smears, 14.7 percent inflammatory epithelial changes, 36 percent atypical squamous cells of undetermined significance (ASCUS), 8.3 percent low grade squamous intra-epithelial lesions (LGSIL) and 1.0 percent high grade intra-epithelial lesions (HGSIL). The ASCUS/SIL ratio was 3.9. Only 40 percent of patients with cytologic diagnosis of SIL and 28 percent with ASCUS had follow-up by repeat smear and/or colposcopy, endocervical curettage and guided cervicals biopsy. Five (45 percent) of the followed up patients had LGSIL inclusive of CIN 1 and condyloma. These results indicate that sexually active girls are risk of developing SIL and those with a diagnosis of ASCUS should be adequately followed up.(AU)

Endometrial carcinoma, the Barbadian experience: a 10 year analysis

Endometrial cancer is one of the most common malignancies seen in postmenopausal females. It is classically described in nulliparous women, who may be overweight, diabetic, hypertensive or have had a late onset of the menopause. In order to examine whether these risk factors applied in Barbadian women, a retrospective study was undertaken of 137 cases of endometrial malignancy diagnosed in Barbados over a 11 year period, January, 1985 to December 1995. The average age of patients at clinical presentation was 67 years. The population incidence was 13 per 100,000 women. Of the patients, 14 percent were nulliparous, and 40 percent were grandmultiparas (ie, 80 Kg or more). 78 percent of the patients were found to have had an onset of menopause at 50 years or older, with the average age at menopause of 52 years. 34 percent of the patients had diabetes mellitus, while 58 percent had systemic hypertension. Histopathology examination showed that there were 86.7 percent adenocarcinomas, 9.5 mixed Mullerian tumors, 5.1 percent undifferential tumors and 0.7 percent sarcomas. The study shows that the basic demographic characteristics were in keeping with published data. However, there is a higher incidence of grandmultiparas and a later age of presentation than in the published literature.(AU)

Detection and identification of human papilloma viruses present in cervico-vaginal lavages by PCR and direct sequence analysis of the PCR product - abstract

Human papilloma virus (HPV) DNA was detected in cercico-vaginal lavages from two groups of women by PCR with the CPI/1IG consenus primer pair. The first group comprised 40 women from a colposcopy clinic with cervical cytology/histology indicative of HPV infection; these were matched with a control group of 45 women who had no history of cervical HPV infection. HPV DNA was detected in 21 (52 percent) of samples from women suspected of HPV and in 21 (47 percent) of those with no history of HPV infection. Direct sequence analysis of the purified PCR product revealed a range of HPV types within the two groups. HPV type 18 was identified in four of the 21 PCR positive women for te Colposcopy Clinic and in one woman in the control group. Type 16 was found in two women only, both the Colposcopy Clinic. Mainly low or intermediate-risk HPV types were identified in the control group. The study revealed that there is a moderately high prevalence of a variety of types of HPA DNA in women with no cytological or histological evidence of HPV infection. (AU)

Epidemiology of Helicobacter pylori infection in Barbados

The epidemiology of Helicobacter pylori infection in Barbadian patients and controls was studied. H. pylori was isolated from biopsies from 50/100 (50 percent) adult patients undergoing endoscopy for investigation of upper gastrointestinal tract symptoms. Urease was detected in biopsies from 54 patients and gastritis was detected by histology in 71 patients. Serology was performed using a commercial ELISA method. Using an IgG concentration of 10 U/ml as a threshold, antibodies were detected in 78 percent of 100 patients undergoing endoscopy, 72 percent of 230 blood donors and 22 percent of 50 children. The mean antibody concentration was significantly higher in patients (92 U/ml) than in blood donors (49 U/ml) or in children (9.5 U/ml). Culture-positive patients (120 U/ml) had higher IgG concentration than culture-negative patients (64 U/ml). Using isolation of H. pylori or a positive biopsy urease test as a measure of true prevalence of infection, the sensitivity of serology was 96 percent, the specificity 42 percent positive predictive value 67 percent and negative predictive value 90 percent. Seroprevalence increased with age, to a peak of more than 90 percent in blood donors aged 50 - 59 years and in patients aged over 60 years. The epidemiology of H. pylori in Barbados is similar to that in developed countries, where few children was infected, but resembles other developing countries in the high seroprevalence observed in middle-aged adults.

Epidemiology of Helicobacter pylori infection in Barbados

The epidemiology of Helicobacter pylori infection in Barbadian patients and controls was studied. H. pylori was isolated from biopsies from 50/100 (50 percent) adult patients undergoing endoscopy for investigation of upper gastrointestinal tract symptoms. Urease was detected in biopsies from 54 patients and gastritis was detected by histology in 71 patients. Serology was performed using a commercial ELISA method. Using an IgG concentration of 10 U/ml as a threshold, antibodies were detected in 78 percent of 100 patients undergoing endoscopy, 72 percent of 230 blood donors and 22 percent of 50 children. The mean antibody concentration was significantly higher in patients (92 U/ml) than in blood donors (49 U/ml) or in children (9.5 U/ml). Culture-positive patients (120 U/ml) had higher IgG concentration than culture-negative patients (64 U/ml). Using isolation of H. pylori or a positive biopsy urease test as a measure of true prevalence of infection, the sensitivity of serology was 96 percent, the specificity 42 percent positive predictive value 67 percent and negative predictive value 90 percent. Seroprevalence increased with age, to a peak of more than 90 percent in blood donors aged 50 - 59 years and in patients aged over 60 years. The epidemiology of H. pylori in Barbados is similar to that in developed countries, where few children was infected, but resembles other developing countries in the high seroprevalence observed in middle-aged adults. (AU)

Appendicitis complicating pregnancy

Abdominal pain is a common symptom in pregnancy. Its etiology is diverse and diagnosis often poses a problem. Inflammatory disorders of extra-uterine origin such as appendicitis should always be considered as a possible cause. Three cases of appendicitis complicating pregnancy managed at the Queen Elizabeth Hospital, Barbados during the year 1993 are documented. Two presented in the antenatal period and the third postpartum. The clinical manifestations and the difficulties encountered in diagnosis are emphasised. (AU)

Clinical and laboratory features of adult T-cell leukaemia lymphoma in Barbados

We describe the clinical and pathological features of 23 Afro-Caribbean patients with adult T-cell leukaemia/lymphoma admitted to the Queen Elizabeth Hospital, Barbados over a 5 year period. There were 9 males and 14 females, with a median age of 38 years (range 14-84). Twelve had acute leukaemia, 10 lymphoma (including 4 with solitary extra nodal lesions) and 1 smouldering subtype. Two patients had a past history of tropical spastic paraparesis/HTLV I associated myelopathy (TSP/HAM). The prognosis was poor, with only 3 complete responses to chemotherapy (CHOP) lasting from 9 to 36 months. We conclude that ATLL in Barbados is similar to the disease in other Caribbean islands and Japan, except that in Barbados the age of onset is over a decade younger than in Japan.(AU)

Clinical and laboratory features of adult T-cell leukemia lymphoma in Barbados

We describe the clinical and pathological features of 23 Afro-Caribbean patients with adult T-cell leukemia/lymphoma admitted to the Queen Elizabeth Hospital, Barbados over a 5 year period. There were 9 males and 14 females, with a median age of 38 years (range 14-84). Twelve had acute leukemia, 10 lymphoma (including 4 with solitary extra nodal lesions) and 1 smouldering subtype. Two patients had a past history of tropical spastic paraparesis/HTLV I associated myelopathy (TSM/HAM). The prognosis was poor, with only 3 complete responses to chemotherapy (CHOP) lasting from 9 to 36 months. We conclude that ATLL in Barbados is similar to the disease in the other Caribbean islands and Japan, except that in Barbados the age of onset is over a decade younger than in Japan.(AU)

Congenital solitary non-parasitic cyst of the liver

Although non-parasitic cysts of the liver have often been described in adults, solitary non-parasitic cysts are rare in infants. We report a 17-month-old child with a large hepatic cyst

Congenital solitary non-parasitic cyst of the liver

Although non-parasitic cysts of the liver have often been described in adults, solitary non-parasitic cysts are rare in infants. We report a 17-month-old child with a large hepatic cyst(AU)

Human T-lymphotropic virus type I DNA in spinal cord of tropical spastic paraparesis with concomitant human T-lymphotropic virus type I negative Hodgkin's disease

We studied a 58 year old black women from Barbados who simultaneously developed myelopathy and lymphoma with human T-lymphotropic virus type I (HTLV-I) antibodies in serum and cerebrospinal fluid and died 3 years after onset. Neuropathological examination showed typical tropical spastic paraparesis (TSP). The polymerase chain reaction (PCR) demonstrated defective proviral genome retaining the HTLV-I pX and env regions in thoracic spinal cord, the level most severely affected. Defective HTLV-I in the nervous system retaining the pX region may be relevant to pathogenesis because circulating CD8+ cytotoxic lymphocytes specific for HTLV-I pX occur in HTLV-I myelopathy. This patient's lymph node biopsy specimen was consistent with Hodgkin's disease (HD), nodular sclerosis subtype, of B-cell origin. The PCR in the paraffin-embedded lymph node involved by HD failed to amplify HTLV-I proviral sequences. Complete HTLV-I proviral amplification was obtained in paraffin-embedded lymph node form positive controls (adults T-cells leukemia). To our knowledge the association of TSP and HD has not been reported previously. Despite claims the HD may be associated with HTLV-I, we demonstrated absence of HTLV-I infected T-cell in the lymphoid infiltrate of HD in this case, positive HTLV-I serology notwithstanding.(AU)

Identification of a unique group of human papillomavirus type 16 sequence variants among clinical isolates from Barbados

The naturally occurring sequence variation of human papillomavirus type 16 (HPV-16) was analysed by direct sequence analysis of the PCR products of the long control region (LCR), the E5 and E7 open reading frames (OFRs), a segment of the L2 ORF overlapping the early viral poly(A) signal and a small segment of the L1 ORF or clinical isolates from Barbados and The Netherlands. Despite the widely different geographical and ethnic origin of the two groups of specimens, sequence analysis revealed relatively few mutational differences. Analysis of the LCR and the E5 ORF appeared to be the minimum requirement for the correct positioning of these variants in the HPV-16 phylogenetic tree. Most of the Barbadian variants appeared to be located at a unique position in the HPV-16 phylogenetic tree, at the internal branch close to the point where the European and Asian branches diverge. In contrast, most of the Dutch samples were located on the European branch. (AU)