UPMC Dermatopathology

UPMC Dermatopathology "Case of the Month" Presentations

UPP - Department of Dermatology, Dermatopathology Unit

5230 Centre Avenue (412) 864-3860           Pittsburgh, PA 15213 (412) 864-3890 FAX


Laura Ferris, MD, PhD, J. Gabriel Vasquez, MD, Jonhan Ho, MD, J. Manuel Zarandona, MD

MAY 2009 CASE OF THE MONTH


CLINICAL FINDINGS

Clinical History

A 46-year old white female with Graves Disease, hypertension, and rosacea presented to our clinic for a four-month history of several confluent erythematous and painful nodules over her right tibia. She was treated empirically with antibiotics three times without improvement.  In addition, she was given corticosteroids, both intralesionally and topically with the intention of treating her Graves’ dermopathy.  At one point the patient’s methimazole was stopped to see if her symptoms would improve, but the pain persisted.  She was otherwise well and had no systemic symptoms.

Physical Exam

The patient had a 1.5x2cm area of confluent, red papules over her right tibia.  The lesion was indurated and tender to light touch.  The rest of her exam was unremarkable.

Differential Diagnosis

Tender erythematous nodules with minimal epidermal changes include: Eccrine spiradenoma, Neurilemmoma, Persistent arthopod bite or sting, Erythema Nodosum, Panniculitis, and Vasculitis.

Histopathology

On histology there was a prominent proliferation of eccrine glands and capillary vessels, as well as other mesenchymal elements, in the dermis.  Alician blue and colloidal iron staining demonstrated increased mucin in hamartomatous areas.

Figures & Images

Figure 1 and 2. Erythematous, indurated nodules and plaques on the back, buttocks, and thighs.
Figure 3. (H&E) Low power view (4 x) of the biopsy with obvious lobular panniculitis and sparing of the dermis.
Figure 4. (H&E – 20 x) Close up of lobular panniculitis with prominent giant cells and histiocytes with adipocyte destruction.

 

 

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