Biomedical subjects

T Houissa

Publications and source records attributed to T Houissa.

At least 19 recordsLinked to original sources

PubMed2003

[Nasal angiocentric T cell-natural killer cell lymphoma with pancreatic localisation in a child].

The nasal angiocentric T-cell-natural killer cell lymphoma is an aggressive tumor, exceptional in Tunisia, which is observed especially in Asia, Mexico and South America. We report the case of an 11-year-old boy, presenting with an exuberant and ulcerative tumor of the right nasal pit. Radiological investigation evidenced a right ethmoïdo-frontal tumor. Evolution was characterized by the installation of abdominal pain and fever, the evidenciation of a mass within the head of the pancreas that compressed the extra hepatic biliary duct and Wirsung's canal and was associated to hyperamylasemia. Biopsy under ultrasound revealed a histiocytic nature. Nasal biopsy found histiocytic and lymphocytic cells and led to a diagnosis of rhinoscleroma. The absence of improvement under antibiotic treatment and the development of fever with leuconeutropenia oriented towards the diagnosis of a non-Hodgkinian malignant lymphoma. Medullary biopsy and immunohistochimic study confirmed a T/NK cells lymphoma, with medullary invasion. The child died from acute respiratory distress syndrome. The authors insist on the rarity of this bipolar location, in particular in children, emphasize the difficulty of the diagnosis and review the literature.

Abdominal Pain↗

PubMed2000

[Ambulatory anesthesia in pediatric surgery].

Child is an ideal patient for day care surgery. So more than 60% of paediatric surgery could benefit by ambulatory surgery. Preoperative visit may select patients for ambulatory surgery. Medical exam may lead to choose pre operative screening. The ideal ambulatory anesthesia is locoregional technic or inhalatory one. Tracheal intubation don't contre indicate ambulatory surgery. Recovery of mental abilities following general anesthesia has not the same significance as in adult. Many studies confirm the safety of paediatric outpatients anesthesia.

Adult↗

PubMed1999

Urolithiasis in Tunisian children: a study of 120 cases based on stone composition.

The composition of urinary stones in children depends on socioeconomic conditions and hygiene, geographical area, and dietary habits. We analyzed urinary stones from 120 consecutive Tunisian children (81 males, 39 females) aged 5 months to 15 years. The stone was located in the upper urinary tract in 91 cases (76%). Stone analysis included both a morphological examination and an infrared analysis of the nucleus and the inner and peripheral layers. The main components of bladder calculi were whewellite (69%) and struvite (22%), whereas the main component of upper urinary tract calculi was whewellite (67%). The nucleus of bladder stones was composed of ammonium urate (45%), struvite (28%), cystine (10%), and carbapatite (7%). The nucleus of kidney and ureteral calculi was mainly composed of ammonium urate (38%), whewellite (24%), carbapatite (13%), or struvite (11%). Based on stone composition, urinary tract infection was involved in the nucleation or growth of a third of calculi. Endemic urolithiasis involving simultaneous nutritional, metabolic, and infectious factors, and defined by its nucleus composed of ammonium urate without struvite, represented 40% of cases. Exclusive metabolic factors - including genetic diseases such as primary hyperoxaluria, cystinuria, and hypercalciuria - were responsible for less than 25% of cases.

Adolescent↗

PubMed1997

[Urinary calculi in children: contribution of anamnesis, biological exploration and physical analysis of calculi to the etiological diagnosis].

BACKGROUND: It is always of importance to define the cause of urinary calculi disease in children to prevent recurrence and possible impairing of renal function. Nevertheless, etiology is not always easy to prove and must be deduced from both clinical and biological arguments. PATIENTS AND METHODS: The aim of this prospective study including 39 Tunisian children with urinary stones was to identify etiology and stone risk factors and detail the part of clinical and biological data and results of physical analysis of stones in determining the cause of the stone. RESULTS: In 31 cases among 39, clinical and biological data were not sufficient to identify clearly the stone etiology. When considering the structure and stone composition, the cause of the stone could be determined in 97.4% of the cases. An inherited disease was found responsible for the stone in 11 children, urinary tract infection in 13 cases, idiopathic hypercalciuria in nine cases and a nutritional deficiency disease in seven cases. In one case, polycystic kidney disease with metabolic risk factors could explain the stone process. No precise etiology was found in one case. Among infection stones, struvite stones could be related to urea-splitting bacteria while other calculi, containing whitlockite and protein matrix could be related to other micro-organisms. Earlier severe chronic diarrhoea episodes were noted in six among seven children presenting stones with a nucleus mainly composed of ammonium urate. CONCLUSION: Clinical data, biological data from both urine and blood of the patients and also the structure and composition of the stones are needed to identify the cause of urinary calculi. Such a procedure could provide the stone etiology in most cases.

Adolescent↗

PubMed1991