Français Features and scintigraphic prognosis of bone metastases in cancer context in Cameroon: lessons learned from 15-year of radionuclide scan at Nuclear medicine department of the Yaounde General Hospital




Scintigraphic features, Scintigraphic prognosis, Bone metastases, Cancers, Cameroon


Objective: To take stock of fifteen years of radionuclide bone exploration in cancers in order to have scintigraphic features and prognosis of bone metastases in our setting.

Patients and Methods: It was a 15-year retrospective and descriptive study with 1278 patients who performed each a radionuclide bone scan for different types of cancers, from 2004 to 2019.  All 99mTc-MDP whole-body bone scans were realized on the same Siemens® gamma camera with a low energy high-resolution collimator. The data collected from files were analyzed using SPSS IBM® 21.0 software with a significant p-value <0.05.

Results: The age of our patients ranged from 15 to 92 years with a mean age of 55.9 years and a 1.34 sex ratio. The most represented age group was 50 to 70 years (39.36%). The most explored cancers in our study were prostate (49.68%), breast (31.77%) and cervix cancers (5.16%). The average duration since the diagnosis of the cancer was 25.7 months. Positive bone scans accounted for 40.77% and the presence of bone metastases revealed an unknown cancer in 9.79%. The preferential affected areas were the chest (79,27%), the spine (78,31%) and the pelvis (71,01%). In 26.49% of positive cases, there was no clinical sign of bone metastasis. According to the EOD and SWOG’s classification, the prognosis was poor in 70.06% and 66.22%. Prostate cancer was the most pejorative and the cervix cancer was the one with the best prognosis (p=0.0014).

Conclusions: The most explored cancers are prostate, breast and cervix cancers. The metastases are present in almost half of the cases, even in the absence of clinical signs. The axial bones, mainly in chest, spine and pelvis, are the preferential sites of metastatic lesions. Ten percent of cancers are revealed by bone metastases. In 2/3 of cases, the prognosis was pejorative. We therefore recommend that clinicians become more aware of the systematic search of bone extension as soon as the cancer is diagnosed, before the appearance of clinical signs.


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How to Cite

NWATSOCK, J. F. (2021). Français Features and scintigraphic prognosis of bone metastases in cancer context in Cameroon: lessons learned from 15-year of radionuclide scan at Nuclear medicine department of the Yaounde General Hospital. Journal Africain D Imagerie Médicale (J Afr Imag Méd) Journal Officiel De La Société De Radiologie d’Afrique Noire Francophone (SRANF), 13(1).

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