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Biomedical subjects

N T Ong

Publications and source records attributed to N T Ong.

7 recordsLinked to original sources
PubMed2000

Focal nodular hyperplasia: an unusual liver mass in a paediatric patient.

We report an unusual case of focal nodular hyperplasia (FNH) occurring in a 19-month-old female without a typical central fibrous scar. Ultrasound demonstrated a solid, hypoechoic, highly vascular mass situated in the left lobe of the liver. Computed tomography showed a solid mass with no evidence of a central fibrous scar. A hepatic angiogram demonstrated enlarged right and left hepatic arteries supplying the vascular tumour, with early venous drainage into the inferior vena cava; a feature which has not been previously described. Surgical resection was carried out and a solid, nodular tumour measuring 9 x 4 x 4 cm was removed. The diagnosis of FNH was made histologically. The characteristic imaging findings of FNH will be discussed and a review of the literature of FNH in children will be presented.

Angiography↗
PubMed1991

Long-term continence in patients with high and intermediate anorectal anomalies treated by sacroperineal (Stephens) rectoplasty.

Thirty-seven patients treated at the Royal Children's Hospital, Melbourne, by Stephens (sacroperineal or sacroabdominoperineal) rectoplasty were reviewed after 5 to 32 years. Continence was assessed using the Kelly, Templeton, Kiesewetter, and Wingspread criteria. Although approximately 20% of the patients were shown to have unsatisfactory control with each clinical scoring system, the remainder have a socially acceptable level of fecal control. Several patient groups had more favorable results than others: (1) females; (2) patients who did not have an abdominal component to their rectoplasty; and (3) patients reviewed more than 10 years after surgery. Twenty-eight patients reached their final level of continence in the first few years and nine improved gradually throughout childhood.

Anal Canal↗
PubMed1990

The leadpoint in intussusception.

Fifty-six patients with a pathological lesion at the leadpoint of their intussusception were encountered at the Royal Children's Hospital, Melbourne, over a 16-year period. The most common lesions were Meckel's diverticula, followed by small bowel polyps, lymphosarcomas, and duplication cysts. Age at presentation was the only factor discriminating these patients from patients with idiopathic intussusception. Unlike previous studies, duration of symptoms was not useful in identifying a pathological leadpoint. Hydrostatic reduction was successful in reducing the leadpoint in three of 21 attempts. Neither morbidity nor mortality was encountered in a policy of initial enema reduction of intussusception, regardless of age.

Adolescent↗
PubMed1990

Progression of intussusception.

The position of the apex in intussusception indirectly reflects the length of the intussusceptum in the majority of cases in which the intussusception begins in the region of the terminal ileum. The relationship of the apex to the duration of symptoms and the ease of enema reduction suggests that progression of intussusception occurs rapidly after the onset of symptoms and is normally complete by the time the patient presents to hospital. Further increase in length of the intussusception is probably limited by progressive edema of the intussusceptum and by the length of small bowel mesentery available to it. The position of the apex per se is not a contraindication to attempted enema reduction, although once the apex has reached the rectosigmoid region successful enema reduction is less likely.

Barium Sulfate↗
PubMed1988

Breast cancer--the need for early diagnosis.

A retrospective study was undertaken of 265 women with breast cancer treated at the Department of Surgery, Toa Payoh Hospital, Singapore, during 8 years from 1977 to 1985. The average patient was aged 51.0 years, with a tumour 4.9 cm in diameter, staged at T2aN1bMO (Stage II). In comparison with an earlier series from the same Unit, an increase in the number of younger patients was noted, although overall a larger proportion of 'early' cases (TNM Stage I) was found. In contrast to recent western series, breast cancer in Singapore is diagnosed at a later stage and generally unsuitable for conservative treatment by lumpectomy and radiotherapy. The standard treatment was modified radical mastectomy, or simple mastectomy with axillary clearance, followed by Radiotherapy if ipsilateral axillary lymphnodes were histologically involved.

Age Factors↗