Definition of micrometastasis in English:


nounplural noun micrometastases

  • 1Medicine
    A metastatic tumor that is too small to be identified in a scan.

    ‘studies suggest that up to 50 percent of patients with histologically normal lymph nodes have micrometastases detected by molecular techniques’
    • ‘The volume of a micrometastasis is small compared to the volume of a lymph node.’
    • ‘The micrometastases present consisted of only a few cells.’
    • ‘The presence of the primary tumour can exert an inhibitory influence on micrometastases.’
    • ‘The most common site for micrometastases after resection of a colorectal tumour is the liver.’
    • ‘Little can be done to modify the natural course of the disease once micrometastases are evident.’
    • ‘For the first time, it suggests that micrometastases do have biological significance.’
    • ‘The development of a sensitive and specific detection method for micrometastases is of paramount importance.’
    • ‘Micrometastases can easily be missed during the routine examination by pathologists.’
    • ‘Minuscule vehicles called "nanoprobes" can be used to detect the presence of micrometastases.’
    • ‘Delivering the killer drug only to micrometastases is a challenge.’
    1. 1.1The formation or occurrence of very small metastatic tumors that are too small to be identified in a scan.
      ‘most of the patients had no metastasis or only micrometastasis’
      • ‘If micrometastasis is identified, then a complete regional lymph node dissection is normally recommended.’
      • ‘This method has been shown to be much more sensitive for detecting micrometastasis.’
      • ‘In patients with malignant tumors various genetic markers are used to detect micrometastasis of lymph nodes.’
      • ‘The impact that improved detection of nodal micrometastasis has on the clinical course of these patients must continue to be evaluated.’
      • ‘Micrometastasis is the major cause of treatment failure in gastric cancer.’
      • ‘Lymph node micrometastasis cannot be detected via a usual pathologic examination.’
      • ‘Accurate diagnosis of micrometastasis is sometimes difficult in the limited time available during surgery.’
      • ‘Micrometastasis was observed in 20 patients.’
      • ‘Survival for patients with micrometastasis was significantly worse than that for patients without.’
      • ‘In micrometastasis, tumor cells penetrate the wall of lymph sinus or blood vessels.’



/ˌmīkrōˌməˈtastəsəs/ /ˌmaɪkroʊˌməˈtæstəsəs/


1960s from micro- + metastasis.