Cutaneous manifestations of internal malignancy

Area of Science:

• Dermatology
• Oncology
• Medical Syndromes

Background:

• Skin lesions can indicate internal malignancy, presenting as direct metastases or indirectly through paraneoplastic syndromes.
• Paraneoplastic disorders are indirectly linked to malignancy and are not cancerous themselves.
• Classifications exist based on association likelihood (obligate/facultative) and pathophysiological mechanisms.

Purpose of the Study:

• To review the classification and recognition of skin manifestations associated with internal malignancy.
• To emphasize the importance of dermatologists identifying cancer-associated dermatoses for early cancer diagnosis.

Main Methods:

• Review of existing literature on cutaneous manifestations of internal malignancy.
• Discussion of classification systems for paraneoplastic and cancer-associated skin disorders.
• Emphasis on clinical recognition and diagnostic implications for dermatologists.

Main Results:

• Skin lesions are categorized into cutaneous metastases, cancer-associated genetic syndromes, paraneoplastic syndromes, and nonspecific manifestations.
• Paraneoplastic syndromes are indirectly associated with malignancy.
• Recognition of these dermatoses aids in the early diagnosis of underlying neoplasms.

Conclusions:

• Dermatologists play a key role in identifying skin lesions that signal internal malignancy.
• Understanding the spectrum of cancer-associated dermatoses improves diagnostic accuracy and patient outcomes.
• Prompt recognition facilitates the timely diagnosis of underlying cancers.