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Related Experiment Videos

Minocycline-related black thyroid.

R Hanzlick1, R Wilson

  • 1Medical Examiner's Office, Fulton County, Atlanta, Georgia.

The American Journal of Forensic Medicine and Pathology
|September 1, 1988
PubMed
Summary

Chronic minocycline antibiotic use can cause black thyroid pigmentation and other pigment changes. Forensic investigators should recognize these minocycline-related changes during death investigations.

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Area of Science:

  • Forensic Pathology
  • Toxicology
  • Histopathology

Background:

  • Minocycline antibiotics are widely prescribed for various conditions.
  • Black pigmentation of the thyroid gland is an observed side effect in patients on long-term minocycline therapy.
  • Pigmentary changes associated with minocycline can also affect skin, blood vessels, and bone.

Purpose of the Study:

  • To review the pigmentary changes in the thyroid gland associated with minocycline use.
  • To discuss the forensic significance of these minocycline-induced pigmentations.
  • To raise awareness among forensic death investigators regarding this potential finding.

Main Methods:

  • Literature review of studies reporting minocycline-associated pigmentations.
  • Analysis of case reports detailing thyroid pigmentation.
  • Discussion of the potential mechanisms and implications of pigment deposition.

Main Results:

  • Consistent observation of black pigmentation in the thyroid gland of patients with chronic minocycline exposure.
  • Documented instances of similar pigmentary changes in other tissues, including skin, sclera, and bone.
  • The pigment is thought to be a minocycline metabolite or a complex of the drug with melanin.

Conclusions:

  • Minocycline-induced thyroid pigmentation is a recognized phenomenon with potential forensic implications.
  • Awareness of this drug-induced change is crucial for accurate interpretation during forensic death investigations.
  • Distinguishing drug-induced pigmentation from other pathological findings is essential for correct diagnosis.

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