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Perforating Granuloma Annulare Mimicking Psoriasis
Joanne S Jacob1, Gregory Krenek2, Jaime Tschen3
1Dermatology, Baylor College of Medicine, Houston, USA.
Cureus
|September 28, 2020
Summary
Perforating granuloma annulare (PGA), a rare inflammatory skin condition, typically presents with multiple lesions. This case highlights an unusual single plaque presentation resembling psoriasis.
Area of Science:
- Dermatology
- Pathology
Background:
- Perforating granuloma annulare (PGA) is a rare inflammatory dermatosis.
- It is characterized by transepithelial elimination of necrobiotic collagen and dermal granulomas.
- Commonly presents as multiple umbilicated papules/pustules on extremities.
Observation:
- This report details an atypical case of PGA.
- The patient presented with a single, localized plaque on the forearm.
- The lesion's morphology mimicked psoriasis.
Findings:
- The case demonstrates an unusual solitary plaque presentation of PGA.
- Challenges typical clinical recognition of the condition.
- Highlights the importance of considering PGA in differential diagnosis of plaque-like lesions.
Implications:
- Presents a diagnostic challenge due to its atypical morphology.
- Broadens the clinical spectrum of perforating granuloma annulare.
- Emphasizes the need for histological examination for definitive diagnosis.
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