Nevus oligemicus

Signs and symptoms

In terms of clinical manifestation, the lesions appear as cyanotic, fixed, erythematous-violaceous patches or, in certain situations, as whitish, telangiectatic plaques. These are typically found in the thighs and stomach area, while instances have also been reported on the hands, chest, and thighs. The primary clinical feature is the continued presence of cold skin to the touch when there isn't any obvious vascular ischemia nearby.

Causes

There are no known triggers other than taking cold baths. Obesity and inactive lifestyles have been identified as risk factors.

Mechanism

Although the exact cause of the pathogenesis is unknown, aberrant vascular receptors appear to be the cause. This leads to changes in adrenergic activity, an increase in sympathetic tone, and ultimately vasoconstriction and a slowdown of deep dermal vascular flow. The chilly temperature over the lesion surface could be caused by these causes.

Diagnosis

Skin temperature, which is typically at least 2°C lower than the surrounding skin, is the primary diagnostic indicator. The diagnosis is primarily clinical, but if histology is done, it reveals blockage of the reticular dermal vessels and dilatation of the papillary dermal vessels with a normal number of vessels.

References

References

1. James, William; Berger, Timothy; Elston, Dirk (2005). ''Andrews' Diseases of the Skin: Clinical Dermatology''. (10th ed.). Saunders. Page 582. {{ISBN. 0-7216-2921-0.
2. (2001). "[Hamartoma oligemicus]". Annales de Dermatologie et de Venereologie.
3. (1983). "Nevus oligemicus with sensory changes". Acta Dermato-Venereologica.
4. (1992). "Nevus oligemicus: A new case". Journal of the American Academy of Dermatology.
5. (2008). "[Six cases of nevus oligemicus]". Actas Dermo-Sifiliograficas.
6. (2013). "Nevus oligemicus: a case series". Journal of the European Academy of Dermatology and Venereology.
7. (2012). "Nevus Oligemicus on the Breasts: A Report of 2 Cases". Elsevier BV.