|Year : 2021 | Volume
| Issue : 1 | Page : 70-71
Linear streaky hypopigmentation
Pooja Arora, Sinu Rose Mathachan
Department of Dermatology, Venereology and Leprosy, Dr. Ram Manohar Lohia and Post Graduate Institute of Medical Education and Research, New Delhi, India
|Date of Submission||07-Dec-2019|
|Date of Decision||09-Mar-2020|
|Date of Acceptance||11-Aug-2020|
|Date of Web Publication||07-Apr-2021|
Postgraduate student Sinu Rose Mathachan
Department of Dermatology, Venereology and Leprosy, Dr. Ram Manohar Lohia and Post Graduate Institute of Medical Education and Research, New Delhi
Source of Support: None, Conflict of Interest: None
Intralesional steroids are associated with several local cutaneous adverse effects. Linear streaky hypopigmentation is a rarely reported side effect that mimics vitiligo. We report a case of linear streaky hypopigmentation following intralesional triamcinolone acetonide and highlight the importance of preventing such side effects by avoiding excess and deeper injections of steroids.
Keywords: Hypopigmentation, intralesional, linear, steroid
|How to cite this article:|
Arora P, Mathachan SR. Linear streaky hypopigmentation. Pigment Int 2021;8:70-1
A 12-year-old child presented with asymptomatic hypopigmented lesions over her left hand extending onto forearms of six months duration. Patient had ganglion cyst over left wrist and had received two intralesional injections of triamcinolone acetonide (40 mg/ml) 4 months prior to appearance of lesions. There was no personal or family history of vitiligo. On examination, there was a hypopigmented atrophic patch over left wrist of size 5 × 3 cm along with a 10 cm long linear white streak radiating towards elbow [Figure 1]. Muscle bulk and joint movements were normal. Based on the clinical presentation and the temporal association with steroid injections, a diagnosis of post-steroid peri lymphatic hypopigmentation was made and the patient was started on tacrolimus 0.1% ointment to be applied twice daily. The parents were counselled regarding the condition, the possibility to repigmentation and were also advised to avoid further injections.
|Figure 1 White atrophic patch over the wrist with linear streaky hypopigmentation.|
Click here to view
Triamcinolone acetonide is commonly used for several dermatologic and non-dermatologic conditions like ganglion cyst and arthritis. Perilesional hypopigmentation, depigmentation, cutaneous atrophy, alopecia, infection, ulceration and localized dystrophic calcification are commonly observed local side effects. Linear hypopigmentation following steroid injection is a rarely seen side effect and could be mistaken as vitiligo. Aetiology of steroid-induced hypopigmentation is unclear and it has been found that corticosteroid inhibits prostaglandin or cytokine production in various epidermal cells, thereby altering the melanocyte function however, the number of melanocytes remains the same. Additionally higher tendency to aggregate, higher potency, larger size, and density of triamcinolone as well as the unbound state of drug while injecting excess amounts where the protein binding capacity exceeds, aggravates hypopigmentation. Further, being a potent lipophilic macromolecule, triamcinolone is extruded via the lymphatics explaining the peri lymphatic spread. Hence while injecting intralesional steroids caution should be taken not to inject excess amount of drug and to avoid injections to deep dermis and subcutaneous tissues so that local adverse effects can be prevented to a certain extent. Repigmentation usually takes several months and there is no specific treatment for the condition. Calcineurin inhibitors act by promoting the melanocyte migration and tyrosinase activation in the affected area and may prove helpful in promoting repigmentation. Fractional carbon dioxide laser has also been tried as a treatment modality.
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Conflicts of interest
There are no conflicts of interest.
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