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- Open Access
Retinal vasculitis associated with pyoderma gangrenosum: a case report
© The Author(s) 2012
- Received: 24 March 2012
- Accepted: 4 May 2012
- Published: 6 June 2012
- Optic Nerve Head
- Pyoderma Gangrenosum
- Hyperbaric Oxygen Therapy
Pyoderma gangrenosum (PG) is an uncommon, idiopathic ulcerative neutrophilic inflammatory skin disease characterized by variable clinical presentation, and the cause of this disease is uncertain . Diagnosis of pyoderma gangrenosum is clinical, and histopathology is not specific and depends on exclusion of other causes of cutaneous ulceration . Clinically it starts with sterile pustules that rapidly progress and become painful ulcers of different size with violaceous borders. The legs are most commonly affected, but other parts of the skin and mucous membranes may also be involved .
PG commonly occurs between 25 and 54 years of age and occurs rarely in children. The estimated incidence of PG is approximately 3–10 patients per 1,000,000 population per year .
Approximately 50 % of patients have an associated systemic disease, commonly inflammatory bowel disease (IBD), ulcerative colitis, arthritis, hematological and lymphoreticular malignancies, while in another 40–50 % patients, no underlying disease is found. The disease is recurrent in approximately 30 % of patients [5, 6]. The management of PG is treatment of underlying systemic medical illness and judicious use of immunosuppressants.
Pyoderma gangrenosum is an uncommon chronic ulcerative condition, the etiology of which is poorly understood . Common disease associations are inflammatory bowel disease, arthritis, monoclonal gammopathy, leukemia, immune deficiency state and HIV infection [5, 6].
Systemic steroids and cyclosporine A either alone or in combination are considered to be the first line of treatment . Other agents used include dapsone, clofazimine, thalidomide, azathioprine and mycophenolate mofetil .
Ophthalmic findings associated with PG are rare . PG-associated nodular scleritis , orbital inflammation , eyelid involvements [11–13] and peripheral ulcerative keratitis  have been reported. In the vast majority of cases, immunosuppressive therapy had been successful.
Despite immunosuppressive therapy with prednisolone and cyclosporine A, a case with destruction of the orbital contents with subsequent perforation of the eye went evisceration . Evisceration was performed together with hyperbaric oxygen therapy pre- and postoperatively. Hyperbaric oxygen therapy helps to reverse the impaired neutrophil function and promotes fibroblasts to produce collagen .
Our patient's history consisted of chest, face and lower extremity papules that eventually ulcerated for 3 years, diagnosed PG based on the clinical aspects of the skin lesions, after exclusion of other specific ulcerative processes by his dermatologists. Histopathology of the lesions was unspecific (chronic ulcer), and he had no systemic disease associated. After ocular involvement occurred, detailed investigation was made for differential diagnosis of retinal vasculitis. Clinical and laboratory tests were negative for other systemic diseases; thereafter, diagnosis was assessed as retinal vasculitis due to PG.
The only PG case associated with retinal vasculitis in the literature was a 49-year-old man who had some other bilateral ocular findings like limbal neovascularization, corneal thinning, extensive gutter formation at the corneal/scleral margin and corneal ulcerations . Immunosuppressive therapy with prednisolone 10 mg daily, dapsone 100 mg daily, minocycline 100 mg daily and topical betamethasone did well in this particular case.
In conclusion, in the absence of other common causes of retinal vasculitis, we presume that in this case the retinal vasculitis is being caused by PG which responds well to systemic steroid therapy. Early recognition of the manifestations can lead to the institution of appropriate therapy, thereby improving the patient's prognosis.
No author has a financial or proprietary interest in any material or method mentioned.
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