Chromosome Analysis - POC / Peripheral Blood

Chromosome analysis of peripheral blood examines chromosomes in white blood cells to produce a karyotype showing number and structure. Results report normal patterns (e.g., 46,XX or 46,XY) or abnormalities such as extra/missing chromosomes (aneuploidy), translocations, deletions, duplications, or mosaicism. It's used to diagnose genetic conditions, infertility or certain cancers; small DNA changes may require higher-resolution tests.

Peripheral blood karyotyping is a laboratory test that analyzes chromosomes from white blood cells to detect numerical and structural chromosomal abnormalities. Blood lymphocytes are cultured, arrested in metaphase, stained, and photographed to create a karyogram showing chromosome number and structure. It helps diagnose genetic disorders, unexplained developmental delays, infertility or recurrent miscarriage, and some cancers, guiding prognosis and clinical management.

POC karyotyping analyzes chromosomes from products of conception (placental or fetal tissue) after miscarriage or stillbirth to detect chromosomal causes of pregnancy loss. Methods include conventional karyotype, chromosomal microarray, or targeted PCR. Results can confirm aneuploidy, guide recurrence-risk counseling and future testing. Limitations include culture failure and maternal-cell contamination; fresh fetal tissue and careful sampling improve accuracy.

The most common trisomy found in products of conception (POC) from miscarriages is trisomy 16, which is typically lethal early in pregnancy and a frequent cause of first‑trimester loss. Trisomy 21 (Down syndrome) is the most common viable trisomy at birth; other trisomies such as 22 and 15 also occur in POC but less often than 16.

Chromosome analysis costs vary widely by test type, lab and country. Basic karyotyping typically ranges from about $100–$1,000; higher-resolution tests (chromosomal microarray or FISH) commonly cost $400–$2,000 or more. In lower-cost markets prices may be lower, with local labs offering modest fees. Public health services or insurance often cover clinically indicated testing—check with your local lab or insurer.

A peripheral blood test for leukemia examines circulating blood to screen for abnormal cells and cell counts. It includes a complete blood count (CBC) and a peripheral smear to evaluate white cell, red cell, and platelet numbers and cell appearance; presence of immature white cells (blasts) or markedly altered counts can suggest leukemia. Abnormal findings prompt further tests, often a bone marrow biopsy, for definitive diagnosis.