[Bazex's paraneoplastic acrokeratosis].

Rev Prat

Published: April 1974

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Acrokeratosis paraneoplastica (Basex syndrome) with trachyonychia preceding the diagnosis of squamous cell carcinoma of the lung.

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Department of Dermatology, Tulane University, New Orleans USA Department of Dermatology, Roswell Park Comprehensive Cancer Center, Buffalo USA.

Acrokeratosis paraneoplastica (Basex syndrome) is a rare paraneoplastic condition hallmarked by psoriasiform lesion development on acral surfaces, most often related to an underlying squamous cell carcinoma. Patients may also present with nail plate changes. Successful management of this condition can be accomplished by treating the underlying malignancy.

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  • The skin can indicate internal diseases, with Bazex syndrome being a specific condition that shows erythematous hyperkeratosis and yellowish scales on palms and soles.
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Bazex syndrome is a paraneoplastic disorder most commonly linked to squamous cell carcinomas of the upper aerodigestive tract, followed by lung cancer and other malignancies. It manifests through three stages of skin involvement that mirror the tumor's progression. Remarkably, skin lesions precede tumor symptoms or diagnosis in two-thirds of cases, underscoring the crucial role of suspecting this condition as it can promptly reveal an underlying neoplasm.

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Acrokeratosis paraneoplastica, also known as Bazex syndrome, is a relatively understudied yet clinically important dermatological condition that is inextricably associated with squamous cell carcinoma, predominantly of the upper respiratory and gastrointestinal tracts. Manifesting as unique psoriasis-like cutaneous lesions, Bazex syndrome functions as an early warning signal for underlying malignancies, underscoring the urgent need for its timely diagnosis and intervention. Notwithstanding its clinical relevance, the molecular and cellular mechanisms underpinning its pathogenesis are not fully understood.

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