Kasabach–Merritt syndrome (KMS) is a potentially life-threatening coagulopathy characterized by enlarging hemangioma with severe thrombocytopenia.[1] KMS. Kasabach-Merritt syndrome is characterised by the combination of rapidly growing vascular tumour, thrombocytopenia, microangiopathic haemolytic anaemia. [2] Thereafter, the association of a capillary hemangioma and thrombocytopenia was labeled Kasabach-Merritt syndrome (the name was later changed to KMP).

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From Wikipedia, the free encyclopedia. Alone we are rare. This phenomenon is only associated with two rare vascular tumors: Open in a separate window.

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Kasabach-Merritt phenomenon – NORD (National Organization for Rare Disorders)

This is the only treatment that provides cure in significant number of cases. Kasabach-Merritt phenomenon is a rare disorder that affects males and females equally The diagnosis is most often made during infancy but older children have been reported with this phenomenon. KMS is usually caused by a hemangioendothelioma or other vascular tumor, often present syndrime birth.

The morbidity and mortality is caused by bleeding. The antenatal scans were normal. Last Updated May She did not have purpuric rash, bruises or ecchymosis on her skin or mucus membranes. Support Center Merrit Center.

Kasabach-merritt syndrome.

Open in a separate window. Treatment was started with ,erritt bandage and steroids. Computerized tomography CT abdomen did not reveal any pancreatic or hepatic arteiovenous malformation or hemangioma. X- ray neck showed enlarged adenoid glands. Successful multimodal therapy for kaposiform hemangioendothelioma complicated by Kasabach-Merritt phenomenon: Low platelets can be associated with other vascular tumors and malformations and this should not be classified at Kasabach-Merritt phenomenon.


The steroids were continued and then tapered after 6 months.

Kasabach – Merritt syndrome: A case report

The aims of treatment of KMS are twofold — involution of the tumor and correction of the life-threatening coagulopathy. Kaposiform Hemangioendothelioma with Kasabach—Merritt Syndrome involving the parotid region, treated with steroids — complete regression. Administration of blood products to correct the coagulopathy may be ineffective.

Kasabach-Merritt phenomenon KMP is a life-threatening consumptive coagulopathy in the presence of a rapidly enlarging vascular tumor. Subsequent computerized tomography and magnetic resonance angiography confirmed arteriovenous malformation involving soft tissue of right side of neck, face, and scalp with acute parenchymal and intraventricular hemorrhage. Indian J Med Paediatr Oncol.

It usually presents in early infancy, but onset in early neonatal period, facial hemangioma, and vincristine use in neonates has rarely been reported.

This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-Share Alike 3. Spontaneous regression is unusual. There was dramatic improvement and hence weekly injections were continued for 27 weeks. Am J Dis Child. D ICD – J Pediatr Hematol Oncol. The first baby was a classical case of KMS with KHE, wherein the hemangioma responded to prednisolone which is the first line of therapy.

There was no visible improvement in the clinical scenario, and due to increasing size, biopsy was advised. It is named after Haig Haigouni Kasabach and Katharine Krom Merrittthe two pediatricians who first described the condition in They present as brown, red or purple areas of skin and are firm to touch.


When these tumors are large or are growing rapidly, sometimes they can trap plateletscausing severe thrombocytopenia. When last seen at 1 year of age, there was faint skin staining at the site of the original hemangioma [ Figure 3 ]. Report of a case.

This coagulopathy is not Kasabach-Merritt phenomenon. Report of a case.

Stepwise multimodal approach in the treatment of Kasabach—Merritt syndrome. There are few reports of kaposiform haemangioendotheliomas without Kasabach-Merritt syndrome. Steroids are considered as the most effective 1 st line treatment. Vincristine is a naturally syndeome vinca alkaloid. Vascular tumors in infancy may present with KMS and require aggressive treatment.

Kasabach-merritt syndrome.

A number of treatments have been used for Kasabach-Merritt syndrome including vincristine and systemic steroidsas well as interferon alpha, cyclophosphamideaspirin and dipyridamole, and radiation therapy. Merrritt Engl J Med. Average time reported for normalization of the platelet count was 5. Hemangiomas are not associated with any coagulopathy or thrombocytopenia.

Ultrasonography skull revealed features of facial hemangioma with intraventricular hemorrhage. Kaposiform hemangioendotheliomas are typically solitary tumours which appear in the soft tissues of the limbs, head and neck or retroperitoneum. Propranolol could have played a role in the improvement of hemangioma, but was stopped due merritt hypoglycemia.