Journal of Cosmetics, Dermatological Sciences and Applications
Vol.3 No.3(2013), Article ID:36222,6 pages DOI:10.4236/jcdsa.2013.33033

Early Pulsed Dye Laser Treatment for Infantile Hemangiomas: An Open Study for 50 Japanese Infancies*

Hideki Endo#, Naoki Oiso, Akira Kawada

Department of Dermatology, Kinki University Faculty of Medicine, Osaka-Sayama, Japan.

Email: #hideki@sakai.med.kindai.ac.jp, naoiso@med.kindai.ac.jp, kawada@med.kindai.ac.jp

Copyright © 2013 Hideki Endo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Received July 4th, 2013; revised August 5th, 2013; accepted August 13th, 2013

Keywords: Evaluation; Pulsed Dye Laser; Infantile Hemangioma; An Open Study; Color; Size; Texture

ABSTRACT

Infantile hemangiomas, occurring at birth or during the first weeks of life, are benign vascular tumors with an initial proliferative phase and a later involutional phase. The massive proliferation on the key regions and unpredicted regression may threaten to life. Thus, early management of infantile hemangiomas is necessary for affected infancies. Recent studies showed that propranolol for infantile hemangiomas had high efficacy for disappearance or reduction of infantile hemangiomas. However, a most recent study demonstrated existence of propranolol-resistant infantile hemangiomas. Therefore, we retrospectively evaluated efficacy of established early pulsed dye laser treatment for infantile hemangiomas in the 50 Japanese infancies which were applied in the period from 2000 to 2005, because our series included from the plaque subtype to the more proliferative tumor subtype. High efficacy in both subtypes suggests that early pulsed dye laser treatment can still be included as the first option for the mixed type of infantile hemangiomas and that pulsed dye laser treatment may be useful as the second line for the propranolol-resistant mixed type of infantile hemangiomas.

1. Introduction

Infantile hemangiomas (IH) are benign with vascular tumors appearing at birth or during the first weeks of life [1-5]. IH is clinically classified as the superficial, the superficial and deep (mixed), and the deep types [2]. The mixed type has varied from the plaque subtype to the more proliferative tumor subtype. IH commonly have an initial proliferative phase and a later involutional phase [6]. Ulceration, bleeding and deformity may threaten to life when the tumors proliferate massively, locate on the key regions or regress unpredictably [7]. Treatment during premature period is recommended to avoid permanent sequelae such as chromatosis telangiectasias and scarring [7]. Early pulsed dye laser treatment or systemic corticosteroid therapy has been applied for treatment of IH. Pulsed dye laser for IH has been shown to have high efficacy and low unexpected outcome [8,9].

In 2008, Léauté-Labrèze et al. showed remarkable effectiveness of propranolol for IH [10]. In Europe and US, administration of propranolol is currently prevalent [11, 12]. However, a subgroup with propranolol-resistant IH is recently reported [13]. Early pulsed dye laser treatment would be a next option for patients who had propranololresistant IH of the mixed type. We retrospectively summarized efficacy of early pulsed dye laser treatment from 2000 to 2005 in 50 Japanese infancies with the mixed type of IH, because our series included not only the plaque subtype but also the tumor subtype.

2. Methods

We retrospectively evaluated efficacy of early pulsed dye laser treatment for the mixed type of IH in 50 (16 males and 34 females) Japanese infancies ranging from 1 to 12 month old. In this series, all cases were applied in the period from 2000 to 2005. We further sub-classified into the plaque and the tumor subtypes according to the clinical phenotype. The typical plaque subtype was shown in (Figure 1(a)). The plaque subtype was characterized by faint vertical proliferation. The typical tumor subtypes were shown in (Figures 2(a), 3(a)). The tumor subtype was manifested with noticeable vertical proliferation. We applied a 585 nm-pulsed dye laser with 1 to 8 periodical exposures, and estimated effectiveness of color, size and texture. The representative results were shown in (Figures 1(b), 2(b), 3(b)).

(a)(b)

Figure 1. The plaque subtype: clinical pictures of the female case 9 on the left hand at the age of 12 months. Excellent improvement was achieved by four times of pulsed dye laser treatment. (a) Pre-irradiation; (b) Post-irradiation.

(a)(b)

Figure 2. The tumor subtype: clinical pictures of the female case 2 on the head at the age of 5 months. Excellent improvement was achieved by six times of pulsed dye laser treatment. (a) Pre-irradiation; (b) Post-irradiation.

(a)(b)

Figure 3. The tumor subtype: clinical pictures of the female case 18 on the left upper limb at the age of 6 months. Excellent improvement was achieved by three times of pulsed dye laser treatment. (a) Pre-irradiation; (b) Post-irradiation.

We used PhotogenicaV® (Cynosure K.K., Tokyo, Japan) emitting pulsed light at a wavelength of 585 nm with pulse duration of 300 to 500 μsec, and fluorescence of 6.0 to 7.0 J/cm with a 5 mm spot size. In this study, application was unified in a pulse width of 450 μsec. At each session, one to seven shots were delivered according to the size of IH.

The outcomes were objectively assessed by two independent observers using side-by-side comparisons of clinical photographs taken before and after treatment. Photographs after treatment were taken after three months from the last session. Effectiveness was graded using four groups as excellent improvement (more than 75 percent clearing), moderate improvement (from 50 to less than 75 percent clearing), slight improvement (from 25 to less than 50 percent clearing), and no-alteration (less than 25 percent clearing).

3. Results

Results in each case were summarized in Table 1: excellent improvement in 28 (56.0%) of 50 affected infancies, moderate improvement in 19 (38.0%) and slight improvement in 3 (6.0%). The effectiveness in the plaque subtype and the tumor subtype was summarized in Table 2. The plaque subtype resulted in excellent improvement in 13 (68.4%) of 19 affected infancies, moderate improvement in 6 (31.6%) and no slight improvement. The tumor subtype showed excellent improvement in 15 (48.4%) of 31 affected infancies, moderate improvement in 13 (41.9%) and slight improvement in 3 (9.7%).

4. Discussion

Pulsed dye laser treatment gives excellent therapeutic results in most types of superficial small-vessel lesions such as portwine stains [14,15], IH [8,9], telangiectasias and other angioma. The risk occurring scar is rare, because energy from the pulsed dye laser is absorbed into the vessels in a rather specific manner.

The pulsed dye laser utilizes theories of selective photothermolysis [16]. The laser emits a monochromatic light which wavelength corresponds to the absorption peak of hemoglobin, leading to selective photothermolysis of cutaneous blood vessels [16]. The pulsed dye laser can produce highly selective cutaneous microvascular damage by choosing an appropriate wavelength and energy density within exposure duration of the thermal relaxation time of the target structure.

The results in our study showed excellent efficacy in the plaque subtype as well as in the tumor subtype, even though the plaque subtype showed more excellent response. Our study confirmed that early treatment with pulsed dye laser for IH recovered skin color, prevented more proliferation of the size and change of the texture. This study evidenced that the tumor subtype could even be managed with pulsed dye laser as commonly shown as the plaque subtype [8,9].

Our results suggest that early pulsed dye laser treatment for IH can still be included as the first option for management for the mixed type of IH. The high efficacy

Table 1. Cases: results of early pulsed dye laser treatment for the mixed type of infantile hemangiomas.

Table 2. Summary: results of early pulsed dye laser treatment for the mixed type of infantile hemangiomas.

for the tumor subtype of the mixed IH in this study implies that pulsed dye laser treatment may be effective as the second line for the propranolol-resistant mixed type of IH.

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NOTES

*Conflicts of interest: None.

#Corresponding author.