Rash with occasional small blisters

Presenter: Sean Branch, D.O., Ryan Owen, D.O., Luis Soro, D.O., Christian Oram, D.O., Stephen Hemperly, D.O., and Kelly Reed, D.O.
Dermatology Program: Lehigh Valley Health Network/Philadelphia College of Osteopathic Medicine
Program Director: Stephen Purcell, D.O.
Submitted on: Mar 3, 2014

CHIEF COMPLAINT:  A 79 year-old male complained of a rash with occasional small blisters.

CLINICAL HISTORY:

Signs and symptoms:  The generalized rash began 4 months ago and was mildly pruritic. Small blisters appeared to rupture easily and leave behind superficial erosions. There was no history of any new or changing medications prior to the onset of his rash.

Previous Treatment:  Triamcinolone 0.1% cream helped somewhat. The rash improved with a course of oral corticosteroids but returned once the medication was completed. The patient could not tolerate methotrexate or azathioprine.

Other information:  Medications: warfarin, folic acid, furosemide, diltiazem

No history of recent travel

PHYSICAL EXAM:

Large crusted erosions, erythema with tessellating scale and pink-red denuded areas on the chest, back, abdomen, arms, neck and face.

LABORATORY TESTS:

CMP, CBC, thiopurine methyltransferase (TPMT), hepatitis panel and HIV all negative or WNL except for WBC 17.98 (3.5-10.5 K/UL)

DERMATOHISTOPATHOLOGY:

Punch Biopsy, Right Lateral Arm: Subcorneal clefts and vesicles with acantholysis. In the dermis there is a minimal inflammatory cell infiltrate. PAS and Gram stain are negative.

Direct Immunofluorescence, Right Medial Arm: Intercellular deposition of IgG and C3. No abnormal deposits of IgG, C3, IgM, IgA or fibrin in basement membrane zone, dermis or vasculature.

 

Right Lateral Arm – 4x
Right Lateral Arm – 10x
Right Lateral Arm – 40x

DIFFERENTIAL DIAGNOSIS:

1.   Pemphigus Foliaceous
2.   Asteatotic Dermatitis
3.   Nummular Dermatitis
4.   Transient Acantholytic Dermatosis
5.   Drug Hypersensitivity Reaction


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