Patient with an unusual rash. What’s the diagnosis?

People online in social media platforms are divided between saying it’s monkeypox or Kaposi’s sarcoma but this looks like malignant syphilis to me. I look forward to what doctors and dermatologists will say though.

Monkey-pox

Monkey-pox is a rare disease caused by a virus. This virus usually affects rodents, such as rats or mice, and non-human primates, such as monkeys. However, it can also affect people.

Symptoms usually appear within 1 to 3 weeks after exposure.

A skin rash appears that can be found on or near the genitals and can occur on all parts of the body. The rash begins as flat spots that become raised bumps, which fill with fluid and then pus. The bumps can be painful. Soon itchy scabs form, fall off, and heal.

Kaposi Sarcoma

Kaposi Sarcoma (KS) is a type of cancer that primarily affects the skin, but it can also involve other organs such as the mouth, lymph nodes, and gastrointestinal tract.

The appearance of KS lesions varies, but they often present as purple or brownish skin lesions.

Malignant syphilis

Malignant syphilis (MS) is an uncommon form of secondary syphilis that presents with ulcerated and necrotic skin lesions. The last 2 decades have seen an increase in the number of published cases, mainly in patients with human immunodeficiency virus (HIV).