[Cholelithiasis and homozygote drepanocytosis in children in Dakar (Senegal)].
BACKGROUND
Cholelithiasis is a well recognized complication of sickle-cell anemia (SCA) because of chronic hemolysis. It is usually asymptomatic but may result in acute cholecystitis or cholangitis. The aim of this study was to assess prevalence of cholelithiasis and its associated factors among Senegalese children and adolescents with SCA.


METHODS
We analyzed the follow-up records and results of systematic clinical, biological and ultrasonographic examinations in 106 patients with SCA aged 11 months to 22 years (median: 10 years, 6 months), followed up in the Albert-Royer Children's Hospital (Dakar).


RESULTS
Cholelithiasis was detected in 9.4% of the patients. Gender, ethnic group, geographic origin and socioeconomic conditions did not have any association with cholelithiasis frequency. The youngest patient with cholelithiasis was 7 years old, and prevalence of cholelithiasis increased with age. The mean age at the beginning of SCA follow-up was higher among patients with cholelithiasis. They were more frequently transfused and tended to present more frequent pain crises and other complications of SCA. We found no spontaneous clinical manifestations attributed to cholelithiasis. Nevertheless, provoked right upper quadrant pain was more frequently observed in patients with cholelithiasis. Fetal hemoglobin, steady-state hemoglobin, reticulocytes count, serum bilirubin, alkaline phosphatase and transaminase levels were not significantly different in these patients, compared to the others. However, those with cholelithiasis had significantly higher mean red cell volume.


CONCLUSIONS
Prevalence of cholelithiasis appears relatively low in Senegalese patients with SCA, probably owing to the tolerance of the Senegal haplotype. Advanced age and severe chronic hemolysis are etiologic factors in evidence. We recommend systematic abdominal ultrasound at least once a year for patients older than 5 years, or when right upper quadrant pain is observed. Cholecystectomy should be performed in cases of cholelithiasis in order to prevent complications.
Diagne
I
I
Chaire de pédiatrie, Université Cheikh Anta Diop de Dakar (UCAD), Hôpital d'enfants Albert-Royer, Sénégal.
Badiane
M
M
Moreira
C
C
Signate-Sy
H
H
Ndiaye
O
O
Lopez-Sall
P
P
Preira-Sylla
G
G
Camara
B
B
Diouf
S
S
Diack-Mbaye
A
A
Fall
M
M
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000755:Anemia, Sickle Cell / Q000150:complications* / Q000175:diagnosis / Q000235:genetics; D002648:Child; D002675:Child, Preschool; D002763:Cholecystectomy; D002769:Cholelithiasis / Q000453:epidemiology* / Q000209:etiology / Q000601:surgery; D003430:Cross-Sectional Studies; D005260:Female; D006720:Homozygote; D006801:Humans; D007223:Infant; D008297:Male; D012675:Senegal / Q000453:epidemiology; D012737:Sex Factors