title: DNA distribution pattern in colorectal carcinoma. A methodologic study comparing two different biopsy techniques.
abstract: DNA content was measured in 59 samples from 20 colorectal adenocarcinomas and 5 adenomas by single cell microspectrophotometry. Samples were obtained simultaneously by fine needle aspiration (FNA) and touch imprints of punch (IMP) biopsies. The results showed that specimens obtained by the two biopsy methods displayed similar DNA ploidy patterns in 46 of 59 samples (78%). The DNA patterns in six samples were aneuploid in IMP and nonaneuploid in FNA and vice versa in seven samples. When DNA patterns of the individual tumors were classified according to the most aggressive one, the two biopsy methods showed 88% concordance, with similar DNA patterns in 22 of 25 patients. The DNA patterns in three patients were classified as aneuploid in FNA specimens and nonaneuploid in IMP. The results indicate that imprints of punch tissue biopsies can be used for a reliable evaluation of the DNA pattern in colorectal tumors.
authors.affiliation: Department of Surgery, Huddinge University Hospital, Sweden.
authors.forename: M
authors.initials: M
authors.lastname: Koha
authors.forename: B
authors.initials: B
authors.lastname: Wikström
authors.forename: B
authors.initials: B
authors.lastname: Brismar
mesh_terms: D000230:Adenocarcinoma / Q000235:genetics*; D000236:Adenoma / Q000235:genetics*; D001706:Biopsy / Q000379:methods*; D015179:Colorectal Neoplasms / Q000235:genetics*; D004273:DNA, Neoplasm / Q000032:analysis*; D006801:Humans; D011003:Ploidies; D015203:Reproducibility of Results
chemical_list: D004273:DNA, Neoplasm