Cutis rhomboidalis nuchae
Alerts and Notices
Synopsis
CRN primarily affects elderly men and women with lighter skin phototypes and history of significant sun exposure. Outdoor occupations also predispose patients to CRN.
CRN is a chronic condition, and once the skin changes have occurred, it is difficult, if not impossible, to reverse the appearance of the skin.
Codes
ICD10CM:L57.2 – Cutis rhomboidalis nuchae
SNOMEDCT:
89019003 – Cutis rhomboidalis nuchae
Look For
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Diagnostic Pearls
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Differential Diagnosis & Pitfalls
- Lichen simplex chronicus – Lines not as furrowed, and history of intense pruritus and rubbing is elicited.
- Systemic amyloidosis – More intense erythema, possible enlargement of the tongue, and biopsy demonstrates amyloid deposition.
- Favre-Racouchot syndrome – Acneiform lesions and agminated comedones.
- Psoriasis – Pink to red, erythematous, well-demarcated plaques with a silvery and micaceous scale; tends to involve the occipital scalp, which is relatively protected from the sun and not involved in CRN.
- Chronic actinic dermatitis
- Fibroelastopapulosis
- Pseudoxanthoma elasticum
Best Tests
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Management Pearls
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Therapy
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References
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Last Reviewed:10/20/2020
Last Updated:10/20/2020
Last Updated:10/20/2020
Cutis rhomboidalis nuchae