[Performance of users in tropical areas with the BI-RADS classification of breast lesions for predicting malignancy]. / Fiabilité des utilisateurs de la classification BI-RADS en milieu tropical pour la prédiction de la malignité des lésions mammaires.

OBJECTIVES: To evaluate the diagnostic performance of radiologists in Cameroon using the BI-RADS classification to interpret mammograms and ultrasound scans together for the prediction of malignant breast lesions. METHODS: This cross-sectional study took place at the Women's and Children's Hospital in Yaounde from July 2009 to April 2010 and included 211 women with breast lesions identified on mammograms during a breast screening campaign and subsequently assessed with ultrasonography and histology. The BI-RADS classifications of these lesions were compared to the corresponding histology results to evaluate the accuracy of predictions of malignancy from the mammograms and ultrasound scans interpreted with the BI-RADS system. The rate of malignancy in each ACR-classified category was also compared to the standard ACR categories as stipulated in the ACR classification. RESULTS: In all, 339 women aged from 16 to 78 years were screened, and lesions requiring biopsies were identified for 211. The age group included most often was the 41-50 year-old group (n = 98, 46.4%). Overall, 135 (64%) women had benign lesions and 76 (36%) malignant. Invasive carcinoma was found in 49 (65%) of the malignant lesions, in situ intraductal carcinoma in 23 (30%), and sarcoma in 4 (5%). Based on the BI-RADS classification, 124 (58.7%) breast lesions were classified as ACR2, 15 (7.1%) as ACR3, 44 (20.8%) as ACR4, and 28 (13.3%) as ACR5. Comparison of the BI-RADS classification and the histological findings showed that 19% of ACR2-classified lesions were malignant, 13% of those classified ACR3, 66% ACR4, and 75% ACR5. The global accuracy in the prediction of malignancy the BI-RADS classification was 77.3%. CONCLUSION: The accuracy of the radiologists using the BI-RADS classification in our hospital was good at 77.3%, although shortcomings in the evaluation and interpretation of some lesions resulted in a relatively high prevalence of malignant lesions in categories ACR2 and ACR3.

Les lymphangiomes : etude retrospective de 12 cas a Yaounde (Cameroun)

Objectif : Rechercher les donnees preliminaires sur les lymphangiomes au Cameroun; leurs topographies ainsi que leurs formes histologiques dans le but d'ameliorer le diagnostic et les modalitestherapeutiques de ces lesions. Materiel et methode : Il s'agit d'une etude retrospective; observationnelle et descriptive.Les patients ayant presente des lymphangiomes documentes par un rapport anatomopathologique ont ete recrutes consecutivement dans tous les laboratoires d'anatomie pathologique du Cameroun sur une periode de 06 ans; de 2004 a 2009. Les coupes histologiques colorees a l' hematoxyline-eosine ont ete revues pour confirmation diagnostique de differents types. Resultats : Douze cas ont ete recrutes. La moitie de ces cas provenait des malades originaires de la region de l'ouest du Cameroun. Le lymphangiome touchait le plus souvent l'enfant age de 1 a 5 ans avec predominance du type hygrome kystique. Les localisations les plus courantes etaient axillaires; cervicales et viscerales. Conclusion : Le lymphangiome constitueun desdiagnostics differentiels important de toute masse survenant chez les patients; en particulier chez les enfants ages de 1 a 5 ans.L'anatomie pathologique est d'une aide dans le diagnostic et la typisation