Primary cutaneous nodular amyloidosis initially presenting with eczema

Area of Science:

• Dermatology
• Pathology
• Medical Case Reports

Background:

• Primary cutaneous amyloidosis is a rare condition characterized by amyloid deposition in the skin without systemic involvement.
• Asteatotic eczema is a common condition presenting with dry, itchy skin, often treated with topical corticosteroids.

Observation:

• A 76-year-old woman presented with asteatotic eczema unresponsive to topical corticosteroids.
• Initial histology showed amyloid deposits in the superficial and deep dermis.
• Lesions evolved into erythematous nodules over 29 months, with subsequent biopsies confirming diffuse dermal amyloid.

Findings:

• The patient was diagnosed with primary cutaneous nodular amyloidosis.
• No evidence of systemic amyloidosis was found.
• The case demonstrates an unusual presentation of primary cutaneous amyloidosis mimicking eczematous dermatitis.

Implications:

• This case underscores the necessity of thorough clinicopathological correlation for diagnosing unusual dermatological presentations.
• Persistent or atypical skin lesions warrant further investigation beyond standard treatments.
• Recognizing the varied clinical manifestations of primary cutaneous amyloidosis is crucial for timely diagnosis and management.