REPORT OF A CASE
A 34-year-old white woman presented with a severalmonth history of two asymptomatic plaques on her chest. Review of systems and history were unremarkable. Physical examination revealed two well-demarcated, smooth, nonscaly erythematous plaques on her chest (Figure 1 and Figure 2). A potassium hydroxide preparation was negative. The skin biopsy specimen with special stain is shown in Figure 3 and Figure 4.
What is your diagnosis?
Figure 1.
Figure 2.
Figure 3.
Figure 4.
DIAGNOSIS:
Plaquelike cutaneous mucinosis (PCM).
HISTOPATHOLOGIC FINDINGS AND CLINICAL COURSE
Alcian blue staining showed increased quantities of acid mucopolysaccharides.
The patient was treated with 0.1% triamcinolone ointment twice daily for 2 weeks with minimal improvement. She was then offered antimalarials; however, she declined further therapy.
DISCUSSION
Plaquelike cutaneous mucinosis is an uncommon disorder of increased mucin deposition. A similar more common condition presenting with reticular lesions is called reticular erythematous mucinosis (REM). Patients
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