The retrieved results provide some information but don't comprehensively cover all syndromes. I'll supplement with my own knowledge to provide a thorough answer.
Syndromes Associated with Hemangiomas
1. Kasabach-Merritt Syndrome
A consumptive coagulopathy triggered by large/giant cavernous hemangiomas (or more precisely, kaposiform hemangioendotheliomas). Features include:
- Thrombocytopenia
- Systemic bleeding
- Disseminated intravascular coagulation (DIC)
The hemangioma acts as a "trap" for platelets and clotting factors.
2. PHACE Syndrome
Posterior fossa malformations, Hemangiomas (large segmental), Arterial anomalies, Cardiac defects, Eye abnormalities. One of the most recognized syndromes involving infantile hemangiomas, especially large facial ones.
3. LUMBAR Syndrome
Lower body hemangiomas, Urogenital anomalies, Myelopathy, Bony deformities, Anorectal malformations, Renal anomalies. Associated with large segmental hemangiomas of the lower body/perineum.
4. Klippel-Trenaunay Syndrome (KTS)
Part of the PIK3CA-Related Overgrowth Spectrum (PROS). Features:
- Cutaneous capillary malformations (port-wine stains) and sometimes hemangiomas
- Soft tissue and bony hypertrophy
- Venous/lymphatic malformations
Caused by somatic PIK3CA mutations.
5. Maffucci Syndrome
- Multiple enchondromas + hemangiomas (typically spindle-cell hemangiomas)
- High risk of malignant transformation (chondrosarcoma, angiosarcoma)
- Associated with IDH1/IDH2 mutations
6. von Hippel-Lindau (VHL) Disease
- Hemangioblastomas of the cerebellum, retina, and spinal cord
- Renal cell carcinoma, pheochromocytoma, pancreatic cysts
- Autosomal dominant; VHL tumor suppressor gene mutation
7. Sturge-Weber Syndrome
- Facial port-wine stain (capillary malformation/hemangioma) in the V1/V2 trigeminal distribution
- Ipsilateral leptomeningeal angiomatosis
- Glaucoma, seizures, intellectual disability
- Caused by somatic GNAQ mutation
8. Blue Rubber Bleb Nevus Syndrome (Bean Syndrome)
- Multiple cutaneous and gastrointestinal venous malformations/hemangiomas
- GI bleeding and iron-deficiency anemia are common complications
- Associated with TEK (TIE2) mutations
9. Hereditary Hemorrhagic Telangiectasia (HHT / Osler-Weber-Rendu)
- Multiple mucocutaneous telangiectasias and visceral AVMs (lung, liver, brain)
- Hepatic hemangiomas/vascular malformations may occur
- Autosomal dominant; ENG or ACVRL1 mutations
10. CLOVES Syndrome
Part of PROS. Features: Congenital Lipomatous Overgrowth, Vascular malformations, Epidermal nevi, Skeletal/spinal anomalies. Includes capillary and venous malformations resembling hemangiomas.
11. Beckwith-Wiedemann Syndrome
- Macroglossia, macrosomia, omphalocele
- Hemangiomas and other vascular birthmarks are a recognized association
- Risk of embryonal tumors (Wilms tumor, hepatoblastoma)
12. POEMS Syndrome
Rare plasma cell disorder: Polyneuropathy, Organomegaly, Endocrinopathy, M-protein, Skin changes — hemangiomas (glomeruloid hemangiomas) are a characteristic skin finding.
Summary Table
| Syndrome | Hemangioma Type | Key Features |
|---|
| Kasabach-Merritt | Giant cavernous | Thrombocytopenia, DIC |
| PHACE | Large infantile facial | Posterior fossa + cardiac defects |
| LUMBAR | Segmental lower body | Urogenital + spinal anomalies |
| Klippel-Trenaunay (PROS) | Capillary/venous | Limb overgrowth |
| Maffucci | Spindle-cell | Enchondromas, malignant risk |
| von Hippel-Lindau | Hemangioblastoma | CNS + renal tumors |
| Sturge-Weber | Port-wine/capillary | Leptomeningeal angioma, seizures |
| Blue Rubber Bleb Nevus | Venous/GI | GI bleeding |
| HHT | Telangiectasias/AVM | Epistaxis, visceral AVMs |
| CLOVES (PROS) | Capillary/venous | Lipomatous overgrowth |
| Beckwith-Wiedemann | Cutaneous | Macroglossia, tumor risk |
| POEMS | Glomeruloid | Neuropathy, M-protein |