**Question:** A 25-year old male had pigmented macules over the palms, soles and oral mucosa. He also had anemia and pain in abdomen. The most probably diagnosis is-

A. Leprosy
B. Sickle cell anemia
C. Melanoma
D. Chronic Chagas disease

**Correct Answer:**

**Core Concept:** The clinical presentation mentioned in the question includes pigmented macules on palms, soles, and oral mucosa, anemia, and abdominal pain. These symptoms can be associated with multiple dermatological, haematological, and infectious diseases.

**Why the Correct Answer is Right:** The correct answer is D. Chronic Chagas disease (also known as American trypanosomiasis), caused by the protozoan Trypanosoma cruzi, presents with skin changes, anemia, and abdominal pain. The macules on the palms, soles, and oral mucosa are a characteristic finding in Chagas disease, known as "Brazilian endocarditis." Anemia is common due to hemolysis and iron sequestration. Abdominal pain can be caused by intestinal involvement or cardiac involvement.

**Why Each Wrong Option is Incorrect:**

A. Leprosy (Mycobacterium leprae infection) typically presents with skin lesions, nerve involvement, and eye and respiratory system involvement. It does not involve the palms, soles, and oral mucosa in a similar pattern.

B. Sickle cell anemia is characterized by painful bone marrow infarcts, hemolysis, and sickle cell crisis. It does not present with macules on palms, soles, and oral mucosa.

C. Melanoma (malignant melanoma) is a skin cancer presenting with a rapid growth, ulceration, and systemic symptoms, which are not described in the given scenario.

**Clinical Pearl:** The correct diagnosis of Chagas disease should be considered in endemic areas when a patient presents with the described clinical features, especially in the context of travel or a history of vector exposure. Prompt diagnosis and treatment can prevent severe complications and improve prognosis.