What are the possible diagnoses for a child presenting with petechiae and palpable purpura?

The presence of petechiae and palpable purpura in a child can indicate a range of underlying conditions primarily related to issues with blood vessels and coagulation. The correct answer includes conditions that are specifically associated with these symptoms.

Coagulation disorders can lead to issues with blood clotting, resulting in bleeding under the skin that manifests as petechiae or purpura. Conditions such as hemophilia or von Willebrand disease fall into this category.

IgA vasculitis, also known as Henoch-Schönlein purpura, is an important consideration. This condition is characterized by purpura, often on the buttocks and legs, and can be associated with abdominal pain and kidney involvement. The distinct presence of palpable purpura, particularly in a child, aligns well with this diagnosis.

Idiopathic thrombocytopenic purpura (ITP) is another relevant diagnosis for a child presenting with these symptoms. In ITP, low platelet counts can lead to spontaneous bleeding, which is reflected in the appearance of petechiae and purpura.

Lastly, viral infections can lead to a variety of symptoms, including those related to the vascular system, and can precipitate both petechiae and purpura.