Post-oesophagectomy anastomotic-bronchial fistula

ABSTRACT

Hong Kong Med J 2011;17:325-7 | Number 4, August 2011
CASE REPORT
Post-oesophagectomy anastomotic-bronchial fistula
Daniel KH Tong, Simon Law
Division of Esophageal and Upper Gastrointestinal Surgery, Department of Surgery, University of Hong Kong Medical Centre, Queen Mary Hospital, Pokfulam, Hong Kong
 
 
Anastomotic leakage after oesophagectomy is a dreaded complication. It has a wide range of presentations ranging from the patient being totally asymptomatic to septic with multi-organ failure. From the literature, in general, cervical anastomoses have a higher leakage rate than those that are intra-thoracic, but leaks from the latter confer greater morbidity. Cervical anastomotic leaks that are truly confined to the neck can be managed conservatively, but can extend into the mediastinum and result in more serious complications. Herein, we report on a patient with an oesophago-gastric anastomosis constructed in the neck but with extension into the mediastinum. Subsequently, the patient developed a fistulous erosion into the tracheobronchial tree, which was successfully managed endoscopically.
 
Key words: Anastomosis, surgical; Esophagectomy; Postoperative complications
 
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A case of young-onset dementia

ABSTRACT

Hong Kong Med J 2011;17:248-51 | Number 3, June 2011
CASE REPORT
A case of young-onset dementia
KW Liu, David LK Dai, K Wang, CY Cheung
Department of Medicine and Therapeutics, Prince of Wales Hospital, Shatin, Hong Kong
 
 
Dementia is a major worldwide public health concern in view of the global ageing phenomenon. Dementia usually occurs in old age. However, if the symptoms occur in young patients, the diagnosis can be challenging. Posterior cortical atrophy is a variant of the Alzheimer’s disease, which is described as a presenile disease affecting relatively late-middleaged patients. A combination of clinical, neuropsychological, and neuroimaging techniques may facilitate making a diagnosis of this particular patient group, as demonstrated in this report. Although there is no effective disease-modifying agent for treating these patients to date, there may be considerable pressure to arrive at a quick and accurate diagnosis from the perspective of employment and insurance.
 
Key words: Alzheimer disease; Atrophy; Dementia; Electroencephalography; Neuropsychological tests
 
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Hypertrophic pyloric stenosis in a newborn: a diagnostic dilemma

ABSTRACT

Hong Kong Med J 2011;17:245-7 | Number 3, June 2011
CASE REPORT
Hypertrophic pyloric stenosis in a newborn: a diagnostic dilemma
Shannon M Chan, Edwin KW Chan, Winnie CW Chu, ST Cheung, YH Tam, KH Lee
Division of Paediatric Surgery and Paediatric Urology, Department of Surgery, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong
 
 
Infants with hypertrophic pyloric stenosis typically present at 2 to 4 weeks of age with nonbilious projectile vomiting. Hypertrophic pyloric stenosis is exceedingly rare in newborn infants and is scarcely reported in literature. Also, the diagnostic criteria for ultrasonographic measurements in newborn infants have yet to be determined. This report is of a newborn infant with hypertrophic pyloric stenosis. The patient presented with high-volume non-bile- stained output from a nasogastric tube and a dilated gastric bubble on abdominal radiograph. Contrast study ruled out intestinal malrotation. Two ultrasound tests showed that the pyloric muscle thickness and pyloric canal length were within normal limits. Subsequent laparotomy showed a thickened pylorus and pyloromyotomy was performed. The patient showed marked improvement in feeding postoperatively. A high index of suspicion is required for newborn infants presenting with gastric outlet obstruction. Ultrasound and contrast studies provide additional information, but definitive diagnosis may only be available intra_operatively.
 
Key words: Hypertrophy; Infant, newborn; Pyloric stenosis; Ultrasonography, Doppler
 
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Giant myxoma causing right ventricular outflow tract obstruction

ABSTRACT

Hong Kong Med J 2011;17:242-4 | Number 3, June 2011
CASE REPORT
Giant myxoma causing right ventricular outflow tract obstruction
Flora HF Tsang, LC Cheng
Division of Cardiothoracic Surgery, Department of Surgery, The University of Hong Kong, Queen Mary Hospital, Pokfulam, Hong Kong
 
 
Atrial cardiac myxoma is the most common benign cardiac tumour. Atrial myxoma most commonly arises from the left atrium and, less frequently, from the right atrium or both ventricles. Cardiac myxoma arising from the tricuspid valve is rare. These tumours can present with right heart failure as a result of right ventricular outflow tract obstruction. A high index of suspicion and appropriate investigations are necessary for making the correct diagnosis. Fatal complications such as embolisation and obstruction of the outflow tract and other intracardiac structures make prompt surgical intervention necessary. We report on a patient with a rare type of giant myxoma arising from the tricuspid valve. He underwent successful operation with en-bloc removal of the tumour, while preserving the integrity of the tricuspid valve.
 
Key words: Heart valve diseases; Myxoma; Tricuspid valve; Ventricular outflow obstruction
 
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Common association of haemolytic uraemic syndrome with invasive Streptococcus pneumoniae infection in five Chinese paediatric patients

ABSTRACT

Hong Kong Med J 2011;17:237-40 | Number 3, June 2011
CASE REPORT
Common association of haemolytic uraemic syndrome with invasive Streptococcus pneumoniae infection in five Chinese paediatric patients
CC So, YY Leung, SF Yip, SY Chan, Clarence CK Lam, Godfrey CF Chan, Stella Chim, LC Chan
Department of Pathology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong
 
 
Haemolytic uraemic syndrome is an important cause of acute renal impairment in childhood. We review the incidence, and clinical and laboratory features of haemolytic uraemic syndrome in a Chinese population. Five patients were identified from 2006 to 2008. All patients were young children with associated invasive Streptococcus pneumoniae pulmonary infection. Serotypes 3, 14, and 19A were confirmed in four patients. The classical post-diarrhoeal form associated with Escherichia coli (O157:H7) infection was not seen. One patient died of acute respiratory failure. Streptococcus pneumoniae infection, as an associated condition in haemolytic uraemic syndrome, is important and relatively common in Chinese patients, especially among children. The acute clinical picture is similar to that reported in the western literature, except for an uncommon association with meningitis. The medium-term renal outcome of the Chinese population appears to be more favourable than the Caucasians. Widespread vaccination against Streptococcus pneumoniae may have resulted in changes in bacterial epidemiology and clinicians should be continuously aware of this severe disease. The use of washed blood components for transfusion in the acute stage requires further study.
 
Key words: Hemolytic-uremic syndrome; Pneumococcal infections; Serotyping; Streptococcus pneumoniae; Vaccination
 
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Persistent hypocalcaemia in a Chinese girl due to a novel de-novo activating mutation of the calcium-sensing receptor gene

ABSTRACT

Hong Kong Med J 2011;17:157-60 | Number 2, April 2011
CASE REPORT
Persistent hypocalcaemia in a Chinese girl due to a novel de-novo activating mutation of the calcium-sensing receptor gene
WC Wong, CW Lam, SF Tong, CT Tong
Department of Paediatrics and Adolescent Medicine, Alice Ho Miu Ling Nethersole Hospital, Tai Po, Hong Kong
 
 
A significant proportion of patients formerly diagnosed with idiopathic hypoparathyroidism actually have activating mutation of the calcium-sensing receptor (CaSR) gene. Awareness of the possibility of activating mutation of CaSR gene in patients with sporadic idiopathic hypoparathyroidism is important because of its relevance to clinical management. This report is of a novel activating mutation of the CaSR gene identified in a 10-year-old Chinese girl who was initially diagnosed as having idiopathic hypoparathyroidism at 6 years of age after presenting with seizures. Her serum calcium level was difficult to maintain near the lower limit of normal despite treatment with high-dose calcitriol. Treatment with calcitriol produced significantly elevated urinary calcium-to-creatinine ratio. Direct sequencing of the CaSR gene showed a novel heterozygous mutation (p.Q735P (c.2204A>C)). Molecular genetic analysis of her parents demonstrated that both parents did not harbour the child's mutation, indicating that her mutation had arisen de novo.
 
Key words: Hypocalcemia; Hypoparathyroidism; Mutation, missense; Receptors, calcium-sensing
 
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Cerebral venous thrombosis secondary to ovarian hyperstimulation syndrome

ABSTRACT

Hong Kong Med J 2011;17:155-6 | Number 2, April 2011
CASE REPORT
Cerebral venous thrombosis secondary to ovarian hyperstimulation syndrome
BL Man, Andrew CF Hui
Department of Medicine and Therapeutics, Prince of Wales Hospital, Shatin, Hong Kong (now at Department of Medicine and Geriatrics, Tuen Mun Hospital, Hong Kong)
 
 
We report a case of a woman who underwent in-vitro fertilisation embryo transfer treatment for infertility and developed an acute stroke (left hemiparesis and headache). The stroke was caused by cerebral venous thrombosis due to ovarian hyperstimulation syndrome. We review the current background about this uncommon disorder.
 
Key words: Cerebral infarction; Chorionic gonadotropin; Ovarian hyperstimulation syndrome; Ovulation induction
 
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Intracranial aneurysms in twins: case report and review of the literature

ABSTRACT

Hong Kong Med J 2011;17:151-4 | Number 2, April 2011
CASE REPORT
Intracranial aneurysms in twins: case report and review of the literature
HK Leung, Y Lam, KM Cheng, CM Chan, YL Cheung
Department of Neurosurgery, Queen Elizabeth Hospital, Kowloon, Hong Kong
 
 
Intracranial aneurysm in twins is a rare clinical disease entity. Only 15 cases have been described in the literature. We report on a pair of identical twins with intracranial aneurysms. One presented with subarachnoid haemorrhage; digital subtraction angiography showed a left posterior communicating artery aneurysm, which was treated by coiling. The patient's twin sister was called for screening, whereupon digital subtraction angiography revealed a right ophthalmic internal carotid artery aneurysm that was treated conservatively.
 
Key words: Diseases in twins; Intracranial aneurysm; Subarachnoid hemorrhage; Twins, monozygotic
 
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Deep brain stimulation in a Chinese Tourette's syndrome patient

ABSTRACT

Hong Kong Med J 2011;17:147-50 | Number 2, April 2011
CASE REPORT
Deep brain stimulation in a Chinese Tourette's syndrome patient
Michael WY Lee, Mandy M Au-Yeung, KN Hung, CK Wong
Department of Neurosurgery, Pamela Youde Nethersole Eastern Hospital, Chai Wan, Hong Kong
 
 
A 31-year-old Chinese man with intractable severe, lifelong Tourette's syndrome characterised by forceful self-injurious motor tics and socially embarrassing vocal tics was treated with bilateral deep brain stimulation. Electrodes were implanted into the thalamic targets at the centromedian-parafascicular complex according to Hassler's nomenclature. A dramatic reduction of tics resulted. At 18 months postoperatively, there was an 81% improvement in his total tics count and a 58% improvement in his Yale Global Tic Severity Scale. His modified Rush video scale decreased from 13 to 8 and visual analogue scale from 10 to 3. These data show that bilateral deep brain stimulation of the thalamus can have a favourable immediate effect on severe tics in a selected group of adult patients suffering from intractable Tourette's syndrome and postoperatively the beneficial effects persisted for at least 18 months.
 
Key words: Deep brain stimulation; Electric stimulation therapy; Midline thalamic nuclei; Tic disorders; Tourette syndrome
 
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Refractory bulbar and respiratory dysfunction in a young Chinese woman with seronegative, muscle-specific tyrosine kinase antibody-positive myasthenia gravis: response to cyclophosphamide and rituximab treatment

ABSTRACT

Hong Kong Med J 2011;17:77-9 | Number 1, February 2011
CASE REPORT
Refractory bulbar and respiratory dysfunction in a young Chinese woman with seronegative, muscle-specific tyrosine kinase antibody-positive myasthenia gravis: response to cyclophosphamide and rituximab treatment
Alexander YL Lau, Anne YY Chan, Vincent CT Mok
Division of Neurology, Department of Medicine and Therapeutics, Prince of Wales Hospital, Shatin, Hong Kong
 
 
The use of cyclophosphamide and rituximab for patients with refractory myasthenia gravis has shown promising results. We report on a 31-year-old Chinese woman with acetylcholine receptor antibody-negative and muscle-specific tyrosine kinase antibody-positive generalised myasthenia gravis who had refractory bulbar dysfunction and respiratory failure despite immunosuppressive therapy and thymectomy, and partial and sustained responses to cyclophosphamide and rituximab treatment, respectively. Myasthenia crisis was diagnosed when she presented in the third trimester of pregnancy with dysphagia, bilateral ptosis, prominent fatigability, and respiratory failure. She required prolonged intensive care and non-invasive ventilatory support despite several courses of intravenous immunoglobulins and plasmapheresis. Pulse cyclophosphamide 500 mg/m2 was given monthly for 4 consecutive months with a partial response. Rituximab 500 mg weekly was subsequently given for 4 weeks with a dramatic and sustained response. She remained symptom-free and assumed full maternal care at 1 year. To the authors’ knowledge, this is the first report of a Chinese patient with refractory myasthenia gravis who responded to cyclophosphamide and rituximab.
 
Key words: Cyclophosphamide; Muscular atrophy; Myasthenia gravis; Receptor proteintyrosine kinases
 
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