Pseudo‐drumsticks in granulocytes of a male with a Yqh+ polymorphism

Charleen M. Moore, Ronald S. Weinger

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


An individual with normal male habitus, body proportions, and secondary sexual characteristics was admitted to the hospital with head trauma. A routine blood smear demonstrated that 36% of the granulocytes had “drumsticks.” Chromosomal analysis revealed a 46, XYqh+ karyotype. The extremely large Y chromosome was located by quinacrine fluorescence in the “drumstick” of the polymorphonuclear granulocytes. The presence of a large Y chromosome may thus produce pseudo‐drumsticks. Fluorescent staining can distinguish between true drumsticks bearing the inactive X of normal females and the pseudo‐drumsticks in a normal male produced by a large Y chromosome.

Original languageEnglish (US)
Pages (from-to)411-414
Number of pages4
JournalAmerican Journal of Hematology
Issue number4
StatePublished - Jun 1980


  • Yqh+
  • chromosome polymorphism
  • drumstick

ASJC Scopus subject areas

  • Hematology


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