Pyoderma gangrenosum associated with erythroid hypoplasia.

Area of Science:

• Hematology
• Dermatology
• Oncology

Background:

• Pyoderma gangrenosum (PG) is a neutrophilic dermatosis often linked to systemic diseases.
• Common associations include inflammatory bowel disease, rheumatoid arthritis, and hematologic malignancies.
• However, its association with primary erythroid hypoplasia (PEH) is exceptionally rare.

Observation:

• An 80-year-old woman presented with severe sepsis secondary to a urinary tract infection.
• She had a concurrent diagnosis of primary erythroid hypoplasia without thymoma.
• An extensive pyoderma gangrenosum lesion was noted on presentation.

Findings:

• The patient's pyoderma gangrenosum lesion demonstrated remarkable spontaneous healing.
• This occurred despite the presence of sepsis and underlying primary erythroid hypoplasia.
• No specific treatment targeting the pyoderma gangrenosum lesion was required for healing.

Implications:

• This case expands the known spectrum of hematologic conditions associated with pyoderma gangrenosum.
• It suggests that pyoderma gangrenosum may sometimes resolve spontaneously, even in the context of severe illness.
• Further research is warranted to understand the mechanisms underlying this rare association and spontaneous resolution.