<prompt> The lymph nodes first involved in cancer of the skin of the scrotum are -Superfical inguinalExternal iliacPara aorticGland of Cloquet  <response>: 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. 