Pyogenic granuloma in a patient with psoriasis successfully treated by 5-aminolevulinic acid photodynamic therapy: A case report

  • Authors:
    • Juan Liu
    • Bing‑Rong Zhou
    • Fei Yi
    • Hong‑Jin Wu
    • Jia‑An Zhang
    • Dan Luo
  • View Affiliations

  • Published online on: November 27, 2015     https://doi.org/10.3892/etm.2015.2899
  • Pages: 345-347
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Abstract

Pyogenic granuloma (PG) is an acquired benign vascular tumor of unknown etiology. In the present case report, PG was detected in a 49-year-old Chinese male patient with chronic plaque psoriasis. The psoriasis lesions on the finger where the granuloma had developed had been scratched excessively, as declared by the patient. No retinoid therapeutic agents were used during treatment. The patient responded poorly to cryotherapy and surgical curettage. However, following one session of 5‑aminolevulinic acid photodynamic therapy (ALA‑PDT), signs of improvement were demonstrated 1 week after the treatment, and 1 month following treatment, there were no signs of reoccurrence. Although a report demonstrating treatment success in one patient may be inadequate to estimate the true efficiency of ALA‑PDT, dermatologists may consider ALA-PDT as an alternative therapy for stubborn PG.

Introduction

Pyogenic granuloma (PG), which is a rapidly growing benign vascular tumor of unknown etiology on the skin and/or subcutaneous tissue, most commonly presents as red or purple smooth papules on the fingers of patients. Furthermore, PGs bleed easily and commonly result after a minor trauma (1). No more than 20 PG cases have been detected in patients with psoriasis (2). Psoriasis is a chronic inflammatory skin disease with a complex etiology, involving various genetic risk factors and environmental triggers, and affecting 2–3% of the worldwide population (3). Piraccini et al have indicated that certain systemic inflammatory diseases, such as psoriasis, may induce granulation tissue, thus predisposing to the development of PGs (1). Histologically, PGs appear as hyperplastic clusters of capillaries, separated by thin fibrous bands arranged in a lobular configuration. Traditional therapeutic options are available, including: Cryotherapy, electrodessication, curettage or shave removal, surgical excision, various laser therapies, micro-embolization and sclerotherapy (4). However, some patients with PG exhibit poor responses to these therapies. In the present study, a patient with psoriasis presented with a single granuloma that bled easily; biopsy results were consistent with a PG that ultimately healed with only one session of 5-aminolevulinic acid photodynamic therapy (ALA-PDT).

Case report

A 49-year-old Chinese man suffering from chronic plaque psoriasis presented with an easily bleeding granuloma on the fifth digit of his left hand, following repeated attempts to remove the scales present on the psoriasis lesions. Written informed consent for individual details and accompanying images was obtained from the patient prior to publication of the present case report. The patient had a 12-year history of chronic plaque psoriasis, affecting the scalp, trunk, and limbs (Fig. 1A) and for several years was being treated with methotrexate; however, the results were unsatisfactory. A small granulation tissue developed on the fifth digit of the patient's left hand following repeated scratching. Clinical examination demonstrated a single fleshy, hemorrhagic papule (diameter, ~1.5 cm; height, 5 mm) and some erosion on the fifth digit of the patient's left hand (Fig. 1B). Fungal and bacterial cultures were negative. Routine laboratory tests, serum chemistry, hematology and urinalysis, and an antinuclear antibody profile demonstrated no abnormal findings.

A biopsy of ~0.5 cm3 skin bleeding granuloma was obtained from the fifth digit of the patient's left hand for histologic evaluation. Serial sections (4 mm) were mounted onto silane-coated slides and stained using hematoxylin-eosin (KeyGen Biotech. Co. Ltd., Nanjing, China). In addition, microscopic evaluation (Olympus BH2 microscope; Olympus Corp., Tokyo, Japan) was performed and digital images of the slides were captured. Histopathological examination detected a lobulated proliferation of capillary vessels circumscribed in edematous stroma, and a dense mixed perivascular cellular infiltrate confirmed the clinical diagnosis of pyogenic granuloma (PG) (Fig. 1C). Cryotherapy was performed twice, however the outcomes were unsatisfactory. Subsequent surgical curettage was performed; however, PG recurred and progressed rapidly 1 week later. Following this, topical ALA-PDT was performed. ALA lotion (20%; Shanghai Fudan Zhangjiang Bio-Pharmaceutical Co. Ltd., Shanghai, China) was applied onto the area of granulation and occluded with saran wrap for ~3 h. The left fifth digit was then irradiated with narrow band LED (633±10 nm; LED-IB; Wuhan Yage Optic and Electronic Technique Co. Ltd., Hubei, China) at a light intensity of 90 mW/cm2 for ~30 min. The patient received one session of ALA-PDT treatment and was followed-up weekly for 1 month. One week following the ALA-PDT treatment, the erosions had dried up, and the PG lesion was encrusted (Fig. 1D). No signs of recurrence were demonstrated 1 month after treatment (Fig. 1E). The patient did not receive any further treatment during the 1-month follow-up.

Discussion

A previous study demonstrated that therapeutic agents, local mechanical trauma, peripheral nerve injury and inflammatory systemic diseases are the most frequent causes of PG (1). Furthermore, PG has previously been described as a side-effect of systemic retinoids, such as isotretinoin and etretinate (5,6). However, as no retinoid drugs were used to treat the patient with psoriasis in the present case report, retinoids may not be considered the cause.

The development of PG may reflect the underlying effects of angiogenic factors, such as vascular endothelial growth factor (VEGF), which was overexpressed in psoriasis lesions (7). Activated T cells, inflammatory cells, and keratinocytes in psoriasis lesions (7) are capable of inducing VEGF secretion. The association between the incidence of psoriasis and the serum concentrations of VEGF has previously been confirmed (8). VEGF is recognized as an indicator of disease severity (9), and the VEGF/VEGF receptor signaling system has previously been investigated as a potential therapeutic strategy for the treatment of psoriasis (10). Therefore, the hypersecretion of VEGF in psoriasis lesions may provide conditions that promote the development of PG. Previous studies have demonstrated that PG may develop during the treatment of psoriasis (2,11). Frictional PG was initially identified in 2001 (12), outlining that trauma may increase the probability of foreign bodies penetrating wounds in skin tissue, with the subsequent inflammatory reaction leading to the formation of PG (12). The authors of the present case report hypothesize that VEGF was overexpressed in the psoriasis lesions of the patient and foreign bodies were introduced into the wound upon scratching, which subsequently induced an inflammatory reaction and the development of PG.

Various therapeutic strategies have been employed to treat patients with PG. Lee et al (13), demonstrated that surgical excision offered the lowest recurrence rates (2.94%) among the surgical management options for PG, whereas cryotherapy exhibited the lowest overall recurrence rate (1.62%). However, the present patient responded poorly to these two first-line treatment options for PG. ALA-PDT employs molecular oxygen, which is a photosensitizing agent, and visible light in order to produce reactive oxygen species that destroy tumor and tumor vasculature cells. ALA-PDT has been widely used to treat skin cancer, acne, warts and various other diseases in the field of dermatology and venereology (14). Furthermore, PDT has previously been used to treat vascular lesions such as port-wine stains and Kaposi's sarcoma (15,16). Lee et al (17) demonstrated that PDT with 5-ALA intralesional injection may be an effective alternative therapeutic technique for the treatment of PG. Previous studies have demonstrated that endothelial cells generate protoporphyrin IX from photosensitizers and PDT has the ability to destroy vascular endothelial cells both in vitro and in vivo (18,19). In addition, VEGF expression was downregulated following ALA-PDT treatment in mice (20). These previous studies may provide evidence regarding the underlying mechanisms of ALA-PDT when used to treat vascular tumors such as PG, as described in the present case. To the best of our knowledge, the present study is the first to report a case of PG that has been successfully treated by topical ALA-PDT.

Acknowledgements

The present case report was supported by grants from the Priority Academic Program Development of Jiangsu Higher Education Institutions (no. JX10231801) and the Shanghai Fudan-Zhangjiang Bio-Pharmaceutical Corporation (2013).

Glossary

Abbreviations

Abbreviations:

ALA-PDT

5-aminolevulinic acid photodynamic therapy

PG

pyogenic granuloma

VEGF

vascular endothelial growth factor

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Spandidos Publications style
Liu J, Zhou BR, Yi F, Wu HJ, Zhang JA and Luo D: Pyogenic granuloma in a patient with psoriasis successfully treated by 5-aminolevulinic acid photodynamic therapy: A case report. Exp Ther Med 11: 345-347, 2016.
APA
Liu, J., Zhou, B., Yi, F., Wu, H., Zhang, J., & Luo, D. (2016). Pyogenic granuloma in a patient with psoriasis successfully treated by 5-aminolevulinic acid photodynamic therapy: A case report. Experimental and Therapeutic Medicine, 11, 345-347. https://doi.org/10.3892/etm.2015.2899
MLA
Liu, J., Zhou, B., Yi, F., Wu, H., Zhang, J., Luo, D."Pyogenic granuloma in a patient with psoriasis successfully treated by 5-aminolevulinic acid photodynamic therapy: A case report". Experimental and Therapeutic Medicine 11.1 (2016): 345-347.
Chicago
Liu, J., Zhou, B., Yi, F., Wu, H., Zhang, J., Luo, D."Pyogenic granuloma in a patient with psoriasis successfully treated by 5-aminolevulinic acid photodynamic therapy: A case report". Experimental and Therapeutic Medicine 11, no. 1 (2016): 345-347. https://doi.org/10.3892/etm.2015.2899