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Biomedical subjects

C M Tiu

Publications and source records attributed to C M Tiu.

At least 55 records · Page 3Linked to original sources
PubMed1991

Hepatic microabscesses caused by Escherichia coli--US and CT appearance.

Hepatic microabscesses have been described in immunosuppressed patients. However, there has been no previous report concerning hepatic microabscesses caused by Escherichia coli (E. coli). Recently, we experienced a 75-year-old male patient who had suffered from fever and upper abdominal pain for 4 days. His laboratory tests revealed an increased erythrocyte sedimentation rate (55 mm/hr), the white cell count was 7500/cumm with 82% segmented leukocytes, minimally elevated serum alkaline phosphatase and serum glutamic-pyruvic transaminase. Ultrasonography (US) showed multiple tiny hypo- or nearly anechoic lesions (3-8mm) diffusely scattered in both hepatic lobes. Some lesions were too small to be demonstrated and only distal acoustic enhancement posterior to the lesions could be noted. Contrast-enhanced computed tomography (CT) scan subsequently demonstrated the tiny hypodense and cystic lesions and confirmed the US diagnosis of microabscesses. Cultures of blood and liver aspirates showed E. coli. Although US and CT appearance of hepatic microabscesses caused by E. coli may be characteristic, it is not specific. Differential diagnosis should include multiple biliary hamartomas, and definite diagnosis should be made by needle aspiration.

Aged↗
PubMed1991

Central venous silastic catheters in newborns and children: localization by sonography and radiology.

Central venous catheters are commonly used in neonatal and pediatric intensive care. Sonographic catheter localization is a technique without any known detrimental side effect. The positioning of silastic central venous catheters in two different diameters used in critical newborns and children was examined by sonography in this study. The sonographic findings were compared with the corresponding radiographic results. Even the very thin catheters could be easily detected due to their strong echoes. Results of forty catheter positions, including malpositions, demonstrate accuracy and practicability of this technique. Sonography may become an alternative examination to reduce the frequency of control radiography.

Catheterization, Central Venous↗
PubMed1991

[CA125 in non-Hodgkin's lymphoma].

CA125 is an antigenic determinant recognized by monoclonal antibody CA125 raised against a serous ovarian cancer cell line. Elevation of this antigen has been reported in over 80% of women with epithelial ovarian cancer and many other diseases including both malignant and non-malignant ones. However, in non-Hodgkin's lymphoma (NHL) only a few reports have focused on this topic thus interesting us. In order to exploit its possible role in this field, a total of 61 eligible patients with a diagnosis of NHL were studied. Serum CA125 was measured by radioimmunoassay (RIA) prior to any operative procedures or chemotherapy. Serum CA125 above 35 U/ml was seen in 47.7% of nodal NHL (n = 44) and 70.6% of extranodal NHL (n = 17) with an overall positive rate at 54.1%. The elevation of serum CA125 correlates well with the presence of peritoneal involvement and therefore, with disease extent to some degree. No correlation between it and the histological type or with the B symptom was the rule. Avidin-biotin peroxidase stain by anti-CA125 MoAb was applied to identify the tissue content of this antigen in 15 cases of whom 11 had CA125 well above 35 U/ml. None of the 15 cases examined showed positive result. In conclusion, serum CA125 is probably no more than an indicator of peritoneal stimulation released by tumor invasion rather than a tumor product. The possible role in disease follow-up remains to be elucidated.

Adult↗
PubMed1991

[Sonographic appearances of mesenteric cysts--report of 2 cases].

Mesenteric cyst is defined as a cystic mass located in the mesentery, and has rarely been reported. Before the clinical use of ultrasound (US), the imaging diagnosis of the abdominal mass depended on plain X-ray films and contrast examinations to delineate the space occupying lesion. The later use of US enables us to readily identify mass character. For example, whether it is cystic or solid, with or without septum, or whether there is sediment in the cyst. US examination is the method of choice in evaluating abdominal masses. Two cases of pediatric mesenteric cysts were brought to our hospital on account of complication. US of the first patient revealed a huge cystic mass with sediment and septae in central abdomen. Mild hydronephrotic change of the right kidney was found. The pathology showed nonepithelial lining multiloculated cyst surrounded by a thick, fibrotic granulomatous wall with suppurative cell infiltration and some calcifications. The histopathological diagnosis was an infected pseudocyst. The other patient had a cyst which twisted the jejunum and resulted in intestinal obstruction. US found dilated intestinal loops and a septate cystic mass in epigastrium. The pathology showed a multiloculated cyst with mesothelial lining, representing a mesothelial cyst. Both patients were treated surgically and had an uneventful recovery. In this article we described and explained the findings on US, discussed the differential diagnoses and compared different imaging modalities.

Abdomen↗
PubMed1991

New therapy for hydrocarbon pneumonitis--nasal prongs continuous positive airway pressure (NPCPAP).

Respiratory failure and conscious disturbance developed in a 18-month-old girl following ingestion of an unknown quantity of spot remover solution, a petroleum distillate product. Rapid deterioration was noted within 2 hours after ingestion. The patient became stable in condition and dramatically improved through intensive care with respiratory support by using nasal prongs continuous positive airway pressure (NPCPAP). To our knowledge, this may be the first case being successfully managed with this technique.

Female↗
PubMed1990

[Duplex Doppler ultrasound of internal jugular vein ectasia. Case report].

A seven-year-old boy, who complained of painless swelling mass over the right neck on exertion, was diagnosed as right internal jugular vein ectasis by the duplex Doppler ultrasound. The caliber of the right internal jugular vein was prominently dilated when Valsalva maneuver was done, the duplex Doppler ultrasound showed an essentially flat wave from that indicated the swelling mass to be a venous structure. The clinical manifestation, etiology, pathological findings and diagnostic methods of the internal jugular vein ectasia were reviewed with emphasis on the advantages of duplex Doppler ultrasound in confirming the diagnosis.

Child↗
PubMed1990

Ultrasonographic demonstration of duplication cyst of the ileum.

The enteric duplication cyst is a term applied to an anomaly of the gut which presents as a cystic structure with a mucosal lining predominantly similar to that of the adjacent alimentary tract. It may be either due to an embryologic error in normal canalization or errors in the embryologic connection between the developing gut and neural tube, as a part of the split notochord syndrome. The preoperative diagnosis of a duplication cyst is difficult to make on the basis of conventional radiologic study including barium swallowing gastrointestinal series. With the wide application of ultrasound in the detection and evaluation of pediatric abdominal masses, an intra-abdominal cystic lesion may be encountered and the differential diagnoses may be difficult or impossible. We hereby report a case of duplication cyst of the ileum in which we believe its sonographic appearance is of certain value or even diagnostic in this pathology.

Child↗
PubMed1990

[Simple testicular cyst].

High-resolution sonograms of scrotum in two hundred and ninety six patients were reviewed. Twenty six patients were found to have simple testicular cyst(s). The specific features of cyst, which included sharp clear margin, anechoic content, posterior wall enhancement and no adjacent echogenic mass, could be found in all lesions. Four cases had bilateral testicular involvement. Solitary cystic lesion was found in 14 tests. The size ranged from 2.0 mm to 1.2 cm. Clustered cystic lesions were found in six testes. The size ranged from 4.0 mm to 2.5 cm. More than one focal lesion were found in 10 testes. Twenty four of these thirty testes had tunica albuginea cyst(s) or cyst(s) abutting on testicular margins. Four patients had follow-up sonograms with the period ranging from three months to two years. No remarkable change of all lesions were noted. The sonographic pictures and its patterns were presented. The pathogenesis and the literature were briefly reviewed.

Adolescent↗
PubMed1989

[Epidermoid carcinoma of the kidney].

Epidermoid carcinoma of the kidney is a rare malignant tumor, characterized by high invasiveness, poor prognosis, and the association of renal stone and renal infection. Very little reports about its sonographic appearance were mentioned in the literature. We present a case of epidermoid carcinoma of the kidney. Its ultrasonography showed a heterogeneous renal mass with perirenal and pararenal invasion, destruction of the renal pelvis, and preservation of enlarged reniform outline. Although this tumor should be differentiated with renal cell carcinoma, transitional cell carcinoma, renal metastatic tumor, renal lymphoma, renal infarction, focal bacterial nephritis, and xanthogranulomatous pyelonephritis etc., we think we should put epidermoid carcinoma of kidney into consideration when a renal tumor mass presents with perirenal and pararenal invasion, destruction of the renal pelvis, and preservation of enlarged reniform outline in sonography, and hypovascularity in angiographic study.

Adult↗
PubMed1987

High-resolution real-time ultrasound in Peyronie's disease.

Sonography is not considered to be a radiation hazard; it is noninvasive and can be widely used for examining external genitalia. We examined six cases of Peyronie's disease of the penis by high-resolution real-time ultrasound. The sonographic findings include a thick echogenic plaque with echogenicity similar to or higher than the tunica albuginea; a calcified plaque in thickened tunica albuginea; and are occasionally associated with calcification in the corpora cavernosa. Sonography may clearly localize the abnormal thickened area of collagen deposition and calcification. Repeated sonography after intracavernosal papaverine injection may further confirm the correlation of the plaque and the abnormally curved erectile penis. Doppler ultrasound may be used for further evaluation of the vascular condition if impotence coexists.

Adult↗