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Infundibulofolliculitis
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Infundibulofolliculitis

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Contributors: Mack Su, Vimal Prajapati MD, Ben Barankin MD, Susan Burgin MD
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Synopsis

Infundibulofolliculitis : Brown color, Follicular configuration, Primarily truncal distribution, Pruritus, Smooth papules
Infundibulofolliculitis, also known as disseminate and recurrent infundibulofolliculitis and Hitch and Lund disease, is an uncommon idiopathic skin disorder characterized by numerous pruritic, skin-colored, follicular-based papules. It most frequently affects the trunk and proximal extremities of young adult males of African descent.

The eruption is often resistant to treatment and may persist for months to years before resolution. Recurrent remissions and exacerbations can occur in some patients.

Codes

ICD10CM:
L73.8 – Other specified follicular disorders

SNOMEDCT:
81856009 – Disseminate infundibulo-folliculitis

Look For

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Diagnostic Pearls

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Differential Diagnosis & Pitfalls

  • Atopic dermatitis (follicular or papular eczema) – History of atopy and seasonal variation, and better response to topical steroids.
  • Folliculitis – Pustules and erythema.
  • Lichen nitidus – Papules are nonfollicular, shiny, and flat-topped.
  • Keratosis pilaris – Central keratin plugs, preferentially affects extensor aspects of arms and legs, and often has seasonal variation.
  • Lichen spinulosus – Central keratin plugs and papules occur in circumscribed plaques.
  • Pityriasis rubra pilaris – Central keratin plugs, papules spread cephalocaudally, scaly orange-red plaques (with "islands of sparing"), and palmoplantar keratoderma.
  • Phrynoderma (vitamin A deficiency) – Central keratin plugs, history of intestinal malabsorption or anorexia nervosa.
  • Darier disease – Follicular and nonfollicular papules coalesce to form larger papillomatous plaques with seborrheic distribution, and characteristic nail and oral findings.

Best Tests

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Management Pearls

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Therapy

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References

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Last Reviewed:10/22/2020
Last Updated:10/22/2020
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Infundibulofolliculitis
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A medical illustration showing key findings of Infundibulofolliculitis : Brown color, Follicular configuration, Primarily truncal distribution, Pruritus, Smooth papules
Clinical image of Infundibulofolliculitis - imageId=677237. Click to open in gallery. caption: 'Multiple pink and dark brown follicular papules and background brown, scaly plaques on the back.'
Multiple pink and dark brown follicular papules and background brown, scaly plaques on the back.

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