Several non hematological solid tumors have been shown to
be associated with a specific pattern of chromosomal abnormality. This is especially
true for cases with childhood tumors such as Retinoblastoma, Wilm's tumor.
A long list of chromosomal aberrations in association with malignancy is now available.
Many of those aberrations are "private" i.e. they do not occur,
frequently, in association with the specific tumor phenotype. However,
cytogenetic study is still a sensitive tool for the diagnosis and follow up of
some non hematological malignancies.
Indications
To determine the nature of tumor especially in non-differentiated tumors.
To predict the prognosis .
To monitor cases for karyotype evolution .
To detect recurrences after chemotherapy.
Analytic time:
Cases requiring short term culture : usually 5-8 days
Cases requiring long term culture : 2-4 wks depending on the
rate of spontaneous growth of cultured cells.