A Study of Pembrolizumab (+) Berahyaluronidase Alfa (MK-3475A) (Pembrolizumab Formulated With Berahyaluronidase Alfa (MK-5180)) in Japanese Participants With Recurrent or Metastatic Cutaneous Squamous Cell Carcinoma (R/M cSCC) or Locally Advanced (LA) Unresectable cSCC (MK-3475A-E39)

Prior treatment

• Has cSCC that can be cured with surgical resection, radiotherapy, or with a combination of surgery and radiotherapy.
• Has received prior systemic anticancer therapy including investigation agents within 4 weeks before allocation
• Has not adequately recovered from major surgery or has ongoing surgical complications
• Received prior radiotherapy within 2 weeks of study intervention, or had radiation-related toxicities, requiring corticosteroids
• Received a live or live-attenuated vaccine within 30 days before the first dose of study intervention

Other illness

• Has any other histologic type of skin cancer other than invasive squamous cell carcinoma as the primary disease under study
• Known additional malignancy that is progressing or has required active treatment within the past 2 years
• Has an ongoing active infection requiring systemic therapy
• Has a history of human immunodeficiency virus (HIV) infection
• Has an active autoimmune disease that has required systemic treatment in past 2 years
• Has history of allogenic tissue/organ transplant

• Has histologically confirmed cSCC by the investigator as the primary site of malignancy
• R/M cSCC cohort only: Has metastatic disease, defined as disseminated disease distant to the initial/primary site of diagnosis, and/or has locally recurrent disease that has been previously treated (with either surgery or radiotherapy) and is not curable by either surgery or radiotherapy
• LA unresectable cSCC cohort only: Is ineligible for surgical resection
• LA unresectable cSCC cohort only: Has received prior radiation therapy (RT) to index site or has been deemed to be not eligible for RT
• LA unresectable cSCC cohort only: Has received prior systemic therapy for curative intent are eligible regardless of regimen
• Has a life expectancy of greater than 3 months
• Must provide archival tumor tissue sample or newly obtained core or excisional biopsy of a tumor lesion not previously irradiated

Criteria the registry did not label

• The key inclusion and exclusion criteria include but are not limited to the following: