A subacute pustular eruption.

Area of Science:

• Dermatology
• Pathology

Background:

• Subacute cutaneous eruptions require accurate histopathological diagnosis.
• Circinate and pustular lesions suggest specific dermatological conditions.

Observation:

• A 61-year-old woman developed a florid, circinate skin eruption with peripheral pustules over a subacute period.
• Clinical presentation included widespread, annular lesions with small pus-filled blisters at the edges.

Findings:

• Histopathological examination revealed intraepidermal pustules characterized by neutrophils.
• Associated findings included acantholysis, the loss of cohesion between keratinocytes.
• A mixed inflammatory infiltrate was observed within the dermal layer.

Implications:

• The findings support a diagnosis of a specific neutrophilic dermatosis.
• Understanding these histological features is crucial for differentiating from other pustular eruptions.
• This case highlights the importance of correlating clinical presentation with histopathology for precise diagnosis.