Christchurch chromosome


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Christ·church chro·mo·some

an obsolete term describing an abnormal small acrocentric chromosome (no. 21 or 22) with complete or almost complete deletion of the short arm; found in cultured leukocytes in some cases of chronic lymphocytic leukemia, also in some unaffected relatives of patients.
A small, acrocentric chromosomal fragment on either chromosome 21 or 22, in which the short arm is missing or partially deleted, found in a New Zealand family, associated with lymphoproliferative disorders—e.g., CLL
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