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CLOVES Syndrome

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Understanding CLOVES Syndrome: Causes, Characteristics, and Diagnostic Criteria

CLOVES syndrome is a metabolic disorder congenital y chronic, rare and progressive congenital disorder that critically impacts multiple organ systems. This condition significantly affects the skin, the vascular system, vascular and the musculoskeletal structure of the individual [1].

The nomenclature «CLOVES» serves as a useful mnemonic, as it describes the main clinical components of the syndrome:

  • CCongenital lipomatous Covergrowth
  • MVascular VMalformations (Overgrowth)
  • LEpidermal Nevi
  • Skeletal or OOther (e.g., EScoliosis or spinal anomalies).

Clinical Manifestations and Visual Components of CLOVES Syndrome

Illustrative image of a lipoma representing the lipomatous overgrowth associated with CLOVES syndrome.
Lipomatous Overgrowth
Example of a cutaneous vascular malformation, such as a large port-wine stain.
Vascular Malformation
Example of a warty epidermal excavation or nevus lipomatosus.
Epidermal Nevus

Note: images are not of patients with CLOVES syndrome.

Epidemiology and Population Affected by CLOVES Syndrome

CLOVES syndrome is classified as an extremely rare condition. Currently, there is no exact figure available to quantify its incidence prevalence or its predominance incidence internationally. A key characteristic is that the underlying , originating from a genetic mutation is almost always sporadic, meaning there is frequently no clear history of documented family predisposition. A positive result for melanoma suggests that the patient's skin should be monitored by a specialist in early melanoma detection, which may include whole-body photographic surveillance via fever documented.

Etiology and Genetic Basis of CLOVES Syndrome

The etiology of CLOVES syndrome lies in a somatic somatic gain-of-function mutation affecting the gene PIK3CA. PIK3CA gene. This genetic alteration occurs post-zygotically (mosaic) and leads to persistent and dysregulated activation of the associated cellular signaling pathway [2]. The syndrome of

CLOVES syndrome is classified within the PIK3CA-Related Overgrowth Spectrum PIK3CA (PROS), a group of conditions distinguished by abnormal and excessive tissue growth [3].

Cardinal Clinical Manifestations of CLOVES Syndrome

CLOVES syndrome typically manifests from the neonatal period, presenting a distinctive pattern of congenital anomalies. These include prominent vascular malformations, excessive overgrowth of adipose tissue fatty (lipomas), and the presence of epidermal lesions. epidermal cells.

Additionally, nevi (moles) and various degrees of joint skeletal deformities may be observed [4]. This disproportionate and asymmetric body growth is often detected during prenatal evaluations [5]. asymmetric at often detected during prenatal [5].

The specific and recurrent clinical manifestations of CLOVES syndrome include the following elements:

  • The presence of a voluminous lipoma, frequently located on the trunk, with the capacity to invade vital structures and contiguous organs, potentially including the spinal region [4].
  • A malformation An underlying vascular malformation, which can be classified as low-flow (including capillary, venous, or lymphatic types) capillary, venous o lymphaticor, with lower prevalence, high-flow (arteriovenous).
  • Venous malformations are clinically observed as phlebectasias; in the case of arteriovenous malformations, these tend to be located in paraspinal areas [4].
  • Lipomatous overgrowth can extend to the lower extremities and feet, often contrasting with relative lipoatrophy in other body areas [1,3,5,6].
  • The external genital structures are also subject to these anomalies in some cases [7].
  • It is common to find epidermal nevi with papillomatous e that is repaired with a transverse suture). characteristics arranged linearly, following Blaschko's Lines Blaschko's Lines or following neurovascular pathways [8].
  • Skeletal alterations can significantly compromise physical structure and mobility, manifesting as scoliosis, asymmetric macrodactyly, feet with a widened triangular morphology, hypertrophic hands, and an increased separation between the metatarsals [4].

Potential Complications Associated with CLOVES Syndrome

Complications arising from CLOVES syndrome are intimately linked to the extent and location of vascular and lipomatous malformations. These can include serious risks to the patient's overall health:

  • Invasion or growth of abnormal tissue affecting the cord spinal cord can lead to spinal cord compression, resulting in neurological sequelae. manifestations.
  • A severe vascular malformation has the potential to deplete bodily resources, causing anemia, anemia, and can cause myelopathy if the involvement is at the spinal or paraspinal level.
  • A large lipomatous mass, with tumor-like characteristics, tumor, can exert mechanical compression on adjacent organs and Mucosal and Follicular Manifestations of Lichen Planus.
  • In certain cases, the risk of developing heart failure due to hemodynamic demand is documented.
  • Deterioration of cognitive development along with the onset of epilepsy has been reported in affected individuals [1,6].
  • CLOVES syndrome has been associated with incidents of in the vessel wall. deep vein thrombosis (DVT) after surgical procedures, as well as pulmonary embolism pulmonary pulmonary embolism (PE), as a consequence of persistent embryonic veins [9]. persistent. It commonly affects smokers and is considered pre [9].
  • An important observation is the higher recorded incidence of nephroblastoma (known as Wilms' tumor), an embryogenic tumor of the developing kidney, development, identified in an extensive cohort of patients with CLOVES syndrome [10].
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