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What is The lymph nodes first involved in cancer of the skin of the scrotum are - and explain in detail?
• Squamous cell carcinoma of scrotumQ, most commonly resulted from exposure to environmental carcinogens including chimney soot, tars, paraffin and petroleum products.
• Superficial inguinal lymph nodes are the first lymph nodes involved. 
Risk Factors
• Most cases results from poor hygiene and chronic inflammation.
Diagnosis
• Diagnosis is established by biopsy of scrotal skin.
Treatment
• Wide excision with 2 cm margins should be performed for malignant tumors.
• Prognosis correlates with presence or absence of nodal involvement.