Mutations affecting PI3kinase are involved in the cause of this condition
CLOVES syndrome is a rare overgrowth syndrome with complex vascular anomalies. CLOVES syndrome affects people with various symptoms, ranging from mild fatty soft-tissue tumors to vascular malformations encompassing the spine or internal organs.
It is a genetic disorder that results from somatic, mosaic gain-of-function mutations of the PIK3CA gene, and belongs to the spectrum of PIK3CA-related overgrowth syndromes (PROS). This rare condition has no specific treatment and a poor survival rate.
In 2018 French doctor Guillaume Canaud[1] published an article in Nature that demonstrate the efficacy of BYL719 (From cancer), an inhibitor of PIK3CA, in preventing and improving organ dysfunction. It seems this treatment is having tremendous and quick effects.
CLOVES syndrome is closely linked to other overgrowth disorders like proteus syndrome, Klippel–Trénaunay syndrome, Sturge–Weber syndrome, and hemihypertrophy, to name a few.
'CLOVES' is an acronym for:[2][3]
C is for congenital.
L is for lipomatous, which means pertaining to or resembling a benign tumor made up of mature fat cells. Most CLOVES patients present with a soft fatty mass at birth, often visible on one or both sides of the back, legs and/or abdomen.
O is for overgrowth, because there is an abnormal increase in the size of the body or a body part that is often noted at birth. Patients with CLOVES may have affected areas of their bodies that grow faster than in other people. Overgrowth of extremities (usually arms or legs) is seen, with large wide hands or feet, large fingers or toes, wide space between fingers, and asymmetry of body parts.
V is for vascular malformations, which are blood vessel abnormalities. Patients with CLOVES have different venous, capillary, and lymphatic channels - typically capillary, venous and lymphatic malformations are known as "slow flow" lesions. Some patients with CLOVES have combined lesions (which are fast flow) and some have aggressive vascular malformation known as arteriovenous malformations (AVM). The effect of a vascular malformation varies per patient based on the type, size, and location of the malformation, and symptoms can vary.
E is for Epidermal naevi, which are sharply-circumscribed chronic lesions of the skin, and benign. These are often flesh-colored, raised or warty.
S is for Spinal/Skeletal Anomalies or scoliosis. Some patients with CLOVES have tethered spinal cord, vascular malformations in or around their spines, and other spinal differences. High-flow aggressive spinal lesions (like AVM) can cause serious neurological deficits/paralysis.
The syndrome was first recognised by Saap and colleagues who recognised the spectrum of symptoms from a set of seven patients.[4] In this initial description the syndrome is named CLOVE syndrome. It is believed that the first description of a case of CLOVES syndrome was written by Hermann Friedberg, a German physician, in 1867.[5][6]
^"Un traitement contre le syndrome de Cloves, maladie qui déforme les organes et proche de celle d'Elephant man". Sciences et Avenir (in French). 2018-06-14. Retrieved 2022-06-08.
^"CLOVES Syndrome". clovessyndrome.org.
^Boston Childrens Hospital 2013. "CLOVES Syndrome - Boston Children's Hospital". childrenshospital.org.{{cite web}}: CS1 maint: numeric names: authors list (link)
^Sapp JC, Turner JT, van de Kamp JM, van Dijk FS, Lowry RB, Biesecker LG (2007). "Newly delineated syndrome of congenital lipomatous overgrowth, vascular malformations, and epidermal nevi (CLOVE syndrome) in seven patients". Am. J. Med. Genet. A. 143A (24): 2944–58. doi:10.1002/ajmg.a.32023. PMID 17963221. S2CID 29578454.
^"CLOVES Syndrome". National Organization for Rare Diseases. Archived from the original on April 2, 2015. Retrieved 24 March 2015.
^Alomari, AI; Thiex, R; Mulliken, JB (October 2010). "Hermann Friedberg's case report: an early description of CLOVES syndrome". Clinical Genetics. 78 (4): 342–347. doi:10.1111/j.1399-0004.2010.01479.x. PMID 21050185. S2CID 21069670.
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