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Advances in Dermatology and Allergology/Postępy Dermatologii i Alergologii
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Original paper

Topical polyphenol treatment of sacrococcygeal pilonidal sinus disease: use of ultrasonography to evaluate response to treatment – clinical case series study

Hasan Mete Aksoy
,
Berna Aksoy
,
Ezgi Ozkur
,
Emel Calikoglu

Adv Dermatol Allergol 2019; XXXVI (4): 431-437
Online publish date: 2019/08/30
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- Topical.pdf  [0.26 MB]
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Introduction

Sacrococcygeal pilonidal sinus disease (SPSD) is a common and well-known entity which was described by Herbert Mayo in 1833. The term “pilonidal” (Latin: pilus = hair and nidus = nest) refers to a disease consisting of hair-containing sinuses in the sacrococcygeal area [1]. For many years the cause of SPSD has been controversial. Many authors proposed congenital origin of the lesion [2] but the acquired origin for SPSD proposed by Karydakis and Bascom is more commonly accepted today [3]. SPSD is a combination of symptoms with presentations ranging from asymptomatic pits to painful draining lesions that are located in the sacrococcygeal area. It has also been reported in interdigital spaces in barbers [4], sheep shearers and dog groomers [5] in the literature. SPSD can be seen in both sexes but it is most commonly seen in hairy young males after puberty when sex hormones are known to affect pilosebaceous glands [6]. SPSD is associated with a requirement for hospital stay and causes a considerable loss of productivity, which is a very important consideration in young age population.
Although surgery is the primary treatment modality for SPSD, there is no general consensus of opinion regarding one method [7] and none of surgical methods seems to be ideal. Complicated surgeries may cause poor wound healing, long hospital stay, patient discomfort, pain and even sepsis [8]. Acquired origin for SPSD pathogenesis is now accepted and there is always a risk of relapse following surgery especially in hairy male patients. So efforts to investigate more effective and less invasive treatment modalities continue. Other modalities for SPSD treatment include laser therapy, phenolization of the sinuses or depilation of buttocks by shaving, laser or creams [9]. However, phenolization needs an experienced physician and maximum attention to avoid complications. On the other hand, humic substances (natural polyphenols) are natural liquid biopolymers and are by-products of soil organic matter degradation, which are present in our environment [10]. Polyphenols were shown to be effective in the treatment of SPSD [11]. Polyphenols are absorbed percutaneously and into pilonidal sinus tracts when they are applied topically over the skin [11]. A possible mechanism of action is removing microorganisms in the wound bed, antioxidant effects against reactive oxygen species, increase in the activity of lysosomes and chemotaxis, and promoting cytokines, interferons and tumour necrosis factor  (TNF-) [11].

Aim

Ultrasonography was reported as an accurate method in the evaluation of sinus tracts and gives an idea about the full extent of the tract and its ramifications [12]. The aim of this study was to evaluate effectiveness of topical polyphenol treatment of SPSD by using physical examination and ultrasonographic assessment. An ultrasonographic examination verifies clinical findings and provides a high level of accuracy in the evaluation of treatment results.

Material and methods

Fourteen patients who were diagnosed with SPSD and treated with sodium humate 25% were included in this case series study retrospectively. Clinical evaluation and treatment of patients were performed in accordance with the ethical principles of the Declaration of Helsinki. Sodium humate 25% was used as the source of polyphenol. There were two natural polyphenol product forms used in the treatment of SPSD. The affected area was depilated before starting the treatment. The major form “DephytoPft Plus® lotion (Aventus Drug, Istanbul, Turkey)” was used before going to bed. A tea spoonful of DephytoPft Plus® lotion was poured onto the problematic region and the area was massaged for 2 to 3 min. Later the area was covered with gauze and the gauze was left in place until morning. In the morning, the medication was washed out by Pilonol Gel® (Aventus Drug, Istanbul, Turkey). The treatment continued daily like this. All of the patients were advised to obey general personal hygiene rules and to keep the sacrococcygeal region depilated for at least 1 year. All of the patients were examined by superficial ultrasonography before and after treatment. Ultrasonographic evaluations were performed by Philips Ultrasound (Netherlands) by using 16 MHz probe and Siemens Ultrasound VFX 13-5 (USA) by using 7.5 MHz thyroid probe. Demographic data, presence of sinuses and/or nodules clinically before and after treatment, recurrences, treatment durations, previous surgical treatments were retrieved from medical records.

Statistical analysis

SPSS 15.0 for Windows program was used for statistical analysis. Descriptive statistics were presented as number and percentage for categorical variables, and mean, standard deviation, minimum, maximum for numerical variables.

Results

Study results were summarized in Table 1. Thirteen male patients and one female patient aged 18–45 years were admitted with the diagnosis of SPSD. Median disease duration was 2 years and median disease attack duration was 60 days. Six (42.9%) patients had previous surgeries. The most common findings in physical examination were sinus openings and subcutaneous nodules at the pre-treatment clinical visit (Table 2). The most common findings in ultrasonography were abscess/cyst and fistula at the pre-treatment visit (Table 2). All of the patients applied topical polyphenols for a mean 3.8 (min.–max.: 1–10) months; 78.6% used the treatment regularly (Table 1). Treatment was effective in 92.9% but 3 (21.4%) patients who got benefit from polyphenol therapy relapsed after a mean 12.3 (min.–max.: 6–19) months (Figures 1–3). These patients with disease relapse used the topical polyphenols again and got benefit. Follow-up examinations in mean 18.3 (min.–max.: 2–52) months revealed that 12 (85.7%) patients were disease-free and only 2 (14.3%) patients had active SPSD (Table 1). Control physical examination and ultrasonography was completely normal in 11 patients without fistula, oedema, sinus openings or cysts (78.6%) (Table 3).

Discussion

The search for new treatment alternatives for SPSD should continue as a considerable loss of productivity observed among affected young individuals causes a significant economic burden. Duman et al. [13] examined 19,013 students who attended state schools and determined that 1258 (6.6%) students had SPSD in Turkey. In a recent study, it was reported that pilonidal cyst incidence increased among people who sat for long hours in front of their desks while working [14]. The ideal SPSD treatment method should be simple, decrease patient discomfort, prevent loss of workdays, shorten hospital stay and at the same time this method should have a low risk of complications and be associated with a low risk of recurrence.
In our study, patients used polyphenols topically over the affected area with massage. Nearly all of them (n = 13) got benefit from topical polyphenol treatment and 10 of them had complete remission. Only 3 patients experienced a recurrence and re-used the treatment. None of them indicated any significant side effects like irritation, erythema, burning and aching sensation. Long-term side effects of topical polyphenols have not been published yet but a study of blood, urine, and tissue levels of catechins following repeated treatments with systemic polyphenols in rat and mice models showed no side effects [15].
Nevertheless, the disadvantage of the topical polyphenol treatment is the need for regular topical applications between 1 and 10 months (mean: 3.8 months). Local skin reactions to topical medication may also adversely affect polyphenol therapy if they occur. Treatment results depend on patient compliance and some patients may request or require more rapid treatment alternatives. Patients with complicated SPSD are not good candidates for topical polyphenol therapy.
Radical surgical excision of the lesion with primary wound closure or secondary wound healing is the most frequently used treatment for SPSD. Flaps were also used to cover soft tissue defects following radical excisions. Surgical site infection after radical excision is a frequent complication with a prevalence up to 24% [16]. Moreover, long hospital stay, analgesic intake, antibiotic use, post-operative care, duration of days off work and operative costs need to be taken into account. Any form of the radical surgical procedure is associated with an anatomical distortion in the natal cleft area and is associated with unsightly scars.
Another treatment option is phenol injection in the sinuses under local anaesthesia. This procedure is easy to perform when compared to surgical procedures and success rates of phenol injections and various surgical procedures were reported to be similar. But this procedure is quite painful in the post-operative period and multiple sessions are generally necessary. The recurrence rate was reported to be between 7% and 27% [17]. Aksoy et al. [11] showed similar recurrence rates in topical polyphenol treatment. They reported that 53.1% of patients who experienced a relapse were treated again with topical polyphenols and similar treatment effectiveness was observed [11].
Dessily et al. [18] treated SPSD patients with a radial laser probe (FILACTM, Biolitec, Germany). The energy delivered to the lesions causes the destruction of the sinus epithelium and this leads to simultaneous obliteration of the tract. The success rate is good but the procedure needs to be done by an experienced physician and requires more expensive equipment and complications like hematomas and abscesses were reported. The cost of surgical treatment for SPSD was reported to be £670 for day-care patients and £2400 for in-patients [19]. In contrast, topical polyphenol treatment of SPSD costs approximately £150 for 3 months [11]. As the treatment duration increases, the treatment cost will increase.
In recent years, negative pressure wound care products have been investigated as one of the adjuvant therapy options for SPSD. The mechanism of action is to absorb exudate which accumulates in the wound, and to reduce the number of bacteria and tissue oedema. Negative pressure wound care products accelerate wound healing but there are relative contraindications to this procedure such as necrotic tissue formation with eschar on the wound, priority of debridement requirement, presence of an untreated osteomyelitis around the wound, cancer in the wound and development of a fistula towards an organ or body cavity [20].
Clinical palpation of the pilonidal sinus tract may underestimate the size of the lesion. We evaluated SPSD lesions with ultrasonography for a quantitative assessment before and after treatment. Ultrasonography was reported as an accurate method of evaluating sinus tracts caused by SPSD in the literature [12]. Borders of the SPSD lesions were determined by ultrasonographic examination and ultrasonography revealed that 12 out of 14 patients had complete healing and the other 2 patients had a decrease in the size of their lesions in our study.
Limitations of our study were a retrospective character of the study, small number of patients and short follow-up period. So future randomized, controlled clinical trials comparing topical polyphenol treatment with the other available SPSD treatment methods are needed.

Conclusions

Topical polyphenol treatment is a promising treatment alternative. This article emphasizes the usage of ultrasonography as an objective evaluation method to assess the effectiveness of topical polyphenols in the treatment of SPSD. It has many advantages when it is compared with other treatment modalities such as ease of use, low cost, no days off work, less pain and efficacy comparable to other treatment alternatives. We advise initial use of topical polyphenols in young and active patients with mild to moderate forms of SPSD. We think that majority of the patients treated with topical polyphenols can avoid demanding and expensive treatment methods like surgery. SPSD is accepted as an acquired surgically treatable disease so effective surgical treatment with a very low risk of relapse must change the anatomy of natal cleft and this causes anatomic disfigurement and healing time is long. Topical polyphenol treatment is non-invasive and can also be used to treat relapses so the need for significant surgical procedures will definitely decrease with the use of this treatment method. Topical polyphenol treatment creates the renaissance of a surgically treatable disorder into a dermatological disorder that can be topically treated by a lotion.

Conflict of interest

The authors declare no conflict of interest.

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