Infantile Hemangioma: This is the most common benign tumor of infancy, typically appearing as a red, raised lesion within the first few weeks of life. It often grows rapidly during the first year before involuting. The clinical presentation, including the timing of appearance and the characteristic growth pattern, makes infantile hemangioma a likely diagnosis.

Congenital Hemangioma: These are present at birth and can be either rapidly involuting congenital hemangiomas (RICH) or non-involuting congenital hemangiomas (NICH). They are less common than infantile hemangiomas but should be considered in the differential diagnosis due to their presence at birth and distinct natural history.
Pyogenic Granuloma: Although not a hemangioma, pyogenic granulomas can appear similar, especially if they are pedunculated and bleeding. They are benign vascular lesions that can appear in infancy and may be considered in the differential due to their vascular nature and potential for rapid growth.

Kaposiform Hemangioendothelioma: A rare, aggressive vascular tumor that can present with significant morbidity, including Kasabach-Merritt syndrome (consumptive coagulopathy). Early recognition is crucial due to its potential for severe complications.
Tufted Angioma: Another rare vascular tumor that can also be associated with Kasabach-Merritt syndrome. Its consideration is critical due to the potential for life-threatening complications.

Arteriovenous Malformation (AVM): Although rare in infancy, AVMs are abnormal connections between arteries and veins that can present as a vascular lesion. They are important to recognize due to their potential for significant bleeding and the need for specific management strategies.
Lymphatic Malformation: These are congenital anomalies of the lymphatic system that can sometimes be confused with hemangiomas due to their soft, cystic nature. They require different management approaches, making their identification important.