Diagnosis

Biopsy of the muscles of the periorbital area revealed dermatomyositis. Anti- Jo1 auto-antibodies were negative. CT of the neck, thorax and the abdomen was normal as was bone scintigraphy. Upper gastrointestinal endoscopy was normal. At colonoscopy, a 1 cm sessile polyp was resected; pathologic examination showed that this was hyperplastic without evidence of malignancy.

Initial administration of antibiotics to our patient had no effect. Once biopsy results were available steroids led to marked clinical improvement and laboratory indices returned to normal. When seen for follow up the patient was in excellent health. Despite the improvement of our patient, she is also under close follow up of the oncology team.

Teaching points
- Bilateral periorbital edema in dermatomyositis is an occasionally reported sign of the disease. The dusky purple heliotrope rash is usually present. It may be the only sign of the disease. Sometimes no other anatomical region except for the periorbital area is afflicted, at least in the beginning of the disease.1 Other skin pathology includes Gottron's papules, cuticular erythema, and telangiectasia, papulosquamous eruption of the hairline, face and trunk. A vesico-bullous form of dermatomyositis is a rare manifestation. Fever may also be a presenting sign of the disease. Diseases leading to decrease levels of serum albumin such as cirrhosis, nephrotic syndrome, and protein-losing enteropathy lead usually to generalized edema in addition to the periorbital area, but usually cause no fever. Allergic diseases are other common causes of periorbital swelling usually not accompanied by fever. Other diseases that enter the differential diagnosis are trichinosis, systemic lupus erythematosus, TNF-receptor associated periodic syndrome, and bilateral internal jugular thrombosis.2-4

- The diagnosis of dermatomyositis may evade if the extent of the disease is limited. Corticosteroids are the mainstay of the treatment of dermatomyositis. The association of dermatomyositis, especially in patients over 40, with neoplasia is well-known.5 Ruling out an underlying malignancy especially when a previous history of the disease is present is mandatory.

Acknowledgement
This case was prepared for our website by Drs. Peter Rafailidis and Anastasios Kapaskelis. The case was also submitted for consideration for publication.

References
1. Hall VC, Keeling JH, Davis MD. Periorbital edema as the presenting sign of dermatomyositis. Int J Dermatol 2003; 42:466-7.
2. Dai YS, Chiu HC. Periorbital heliotrope oedema as the only initial clinical manifestation of systemic lupus erythematosus in a primigravida. Br J Dermatol 2000; 143:679-80.
3. Milne LM, Bhagani S, Bannister BA, et al. Trichinellosis acquired in the United Kingdom. Epidemiol Infect 2001; 127:359-63.
4. Toro JR, Aksentijevich I, Hull K, Dean J, Kastner DL. Tumor necrosis factor receptor-associated periodic syndrome: a novel syndrome with cutaneous manifestations. Arch Dermatol 2000; 136:1487-94.
5. Scheinfeld NS. Ulcerative paraneoplastic dermatomyositis secondary to metastatic breast cancer. Skinmed 2006; 5:94-6.