|LETTER TO THE EDITOR - OBSERVATION LETTER
|Year : 2018 | Volume
| Issue : 5 | Page : 617-619
Photodynamic therapy for acne conglobata of the buttocks: Effective antiinflammatory treatment with good cosmetic outcome
Francesco Borgia, Mario Vaccaro, Roberta Giuffrida, Serafinella P Cannavò
Department of Clinical and Experimental Medicine, Dermatology Unit, University Hospital “G. Martino,” Messina, Italy
|Date of Web Publication||31-Jul-2018|
Dr. Francesco Borgia
Department of Clinical and Experimental Medicine, Dermatology Unit, University Hospital “G. Martino,” Via Consolare Valeria, Messina 98125
Source of Support: None, Conflict of Interest: None
|How to cite this article:|
Borgia F, Vaccaro M, Giuffrida R, Cannavò SP. Photodynamic therapy for acne conglobata of the buttocks: Effective antiinflammatory treatment with good cosmetic outcome. Indian J Dermatol Venereol Leprol 2018;84:617-9
|How to cite this URL:|
Borgia F, Vaccaro M, Giuffrida R, Cannavò SP. Photodynamic therapy for acne conglobata of the buttocks: Effective antiinflammatory treatment with good cosmetic outcome. Indian J Dermatol Venereol Leprol [serial online] 2018 [cited 2020 May 28];84:617-9. Available from: http://www.ijdvl.com/text.asp?2018/84/5/617/238094
Acne conglobata is an uncommon difficult-to-treat severe inflammatory acne variant that affects deep skin tissue, causing swelling, bleeding, purulent discharge and pain. Several therapeutic options have been used with variable results, often leaving residual disfiguring scars. Here, we report a case of histologically proven acne conglobata in a 16-year-old Caucasian man with a 5-month history of sudden-onset painful nodular cystic eruption on the buttocks. History did not reveal any drug usage or predisposing hereditary factors. Previous treatments with oral minocycline (4 weeks), topical retinoid and systemic isotretinoin (0.5 mg/kg/d) were ineffective. Examination revealed multiple inflamed nontender suppurative nodules localized on the buttocks [Figure 1]a and lateral aspects of the pelvis, with spontaneous bleeding and purulent discharge. No lesions were detected elsewhere on physical examination. Such protracted painful eruption severely affected the patient's quality of life, interfering with daily activities. We, therefore, decided to start photodynamic therapy as monotherapy because of its antiinflammatory and antimicrobial effects as well as its ability to reduce the risk of disfiguring scars. After a written informed consent, 10% 5-aminolaevulinic acid in polyethylene glycol ointment was applied in occlusion for 3 h on the buttocks; irradiation was then applied with diode red light at 630 nm (S630, Alpha Strumenti, Milan, Italy) for 8 min, with a total light dose of 75 J/cm2. Fluorescence, detected using violet light at 405 nm, was localized with high intensity, especially in inflammatory nodules. The patient was treated every 2 weeks for a total of six treatments over a period of three months. Intense pain and inflammation were reported after the first two sessions (visual analog scale mean values of 10/10 and 8/10, respectively) and were managed with oral paracetamol and topical application of corticosteroids, while only minimal discomfort was recorded at the successive exposures. At the end of the treatment period, a remarkable improvement of the clinical features was observed, with healing of the cutaneous nodules and no noteworthy adverse event [Figure 1]b. At 6 months' follow-up, a lasting remission with favorable cosmetic results was observed [Figure 1]c. Photodynamic therapy typically involves topical application of the photosensitizing prodrug aminolaevulinic acid or its methylated ester, converted by the heme biosynthetic pathway predominantly to protoporphyrin IX and activated by light of appropriate wavelength to produce reactive oxygen species, especially singlet oxygen, which trigger apoptosis and necrosis of target cells. In addition to established indications in nonmelanoma skin cancer, photodynamic therapy is used with increasing frequency in several inflammatory dermatoses as well as in wound healing.,, The greater absorption of aminolaevulinic acid together with higher production of protoporphyrin IX in hair follicles compared to other tissues seems to be the mechanism of action in inflammatory diseases of the pilosebaceous unit such as chronic folliculitis and hidradenitis suppurativa.,, In our patient, photodynamic therapy was very effective to prevent scars as well. This striking cosmetic outcome may be the consequence of a combination of antiinflammatory effect, immunomodulatory activity and keratinocyte photoactivation with subsequent paracrine induction of matrix metalloproteinases production in fibroblasts, favoring the remodeling of the dermal matrix architecture. The good tolerability, high safety profile and absence of durable side effects render photodynamic therapy a valid therapeutic option for acne conglobata; its use at an early stage of the disease may accelerate resolution of the cystic lesions, reducing the risk and the severity of disfiguring scars.
Declaration of patient consent
The authors certify that they have obtained all appropriate patient consent forms. In the form, the patient has given his consent for his images and other clinical information to be reported in the journal. The patient understands that name and initials will not be published and due efforts will be made to conceal identity, but anonymity cannot be guaranteed.
Financial support and sponsorship
Conflicts of interest
There are no conflicts of interest.
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