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Cutaneous amyloidoma secondary to repeated insulin injections
  1. Ken Hiu-Kan Ip1,
  2. Karen Koch1,
  3. Duncan Lamont2
  1. 1 Dermatology Department, Waikato District Health Board, Hamilton, New Zealand
  2. 2 Anatomical Pathology Department, Waikato District Health Board, Hamilton, New Zealand
  1. Correspondence to Dr Ken Hiu-Kan Ip, Dermatology Department, Waikato District Health Board, Hamilton 1051, New Zealand;Ip.KenHK{at}gmail.com

http://dx.doi.org/10.1136/postgradmedj-2020-138428

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    A 71-year-old man with renal colic was referred to dermatology clinic after a CT urogram revealed an incidental area of subcutaneous tissue thickening in the left abdominal wall (figure 1A). His medical history included suboptimally controlled type II diabetes (HbA1c 73 mmol/mol). He had been self-injecting human insulin (Humulin 30/70) into his left lower abdomen for the past 10 years, without site rotation. Examination revealed an asymptomatic subcutaneous nodule (figure 1B). An incisional biopsy showed fibrotic adipose tissue …

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    Footnotes

    • Contributors KH-KI, KK and DL were involved in the clinical care of the patient and contributed equally to the preparation of the manuscript. All authors read and approved the final submitted version.

    • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

    • Competing interests None declared.

    • Patient consent for publication Written informed consent was obtained from the patient.

    • Provenance and peer review Not commissioned; externally peer reviewed.