nevus spilus

{{Infobox medical condition (new)

| name = Nevus spilus

| synonyms = Speckled lentiginous nevus

| image = Naevus-spilus.jpg

| alt =

| caption = Nevus spilus, approximately 3 cm x 4 cm

| pronounce =

| field = Dermatology

| symptoms =

| complications =

| onset =

| duration =

| types =

| causes =

| risks =

| diagnosis =

| differential =

| prevention =

| treatment =

| medication =

| prognosis =

| frequency =

| deaths =

}}

Nevus spilus, also known as speckled lentiginous nevus, is a light brown or tan birth mark, speckled with small, dark spots or small bumps.{{cite book |last1=James |first1=William D. |last2=Elston |first2=Dirk |last3=Treat |first3=James R. |last4=Rosenbach |first4=Misha A. |last5=Neuhaus |first5=Isaac |title=Andrews' Diseases of the Skin: Clinical Dermatology |date=2020 |publisher=Elsevier |location=Edinburgh|isbn=978-0-323-54753-6 |pages=686–687|edition=13th |chapter-url=https://books.google.com/books?id=UEaEDwAAQBAJ&dq=Spilus&pg=PA686 |language=en |chapter=30. Melanocytic nevi and neoplasms}} If it occurs in a segmental pattern then it is sometimes referred to as a Zosteriform speckled lentiginous nevus.

It may be associated with types of phakomatosis pigmentovascularis.{{cite book|last=Johnstone |first=Ronald B.|title=Weedon's Skin Pathology Essentials |url=https://books.google.com/books?id=NTE_DAAAQBAJ|year=2017|publisher=Elsevier |isbn=978-0-7020-6830-0|edition=2nd|page=530|chapter=32. Lentigines, nevi and melanomas}}

Prevalence is between 0.2% and 2.8%.{{cite book |last1=DE |first1=Elder |last2=D |first2=Massi |last3=RA |first3=Scolyer |last4=R |first4=Willemze |title=WHO Classification of Skin Tumours |date=2018 |publisher=World Health Organization |location=Lyon (France) |isbn=978-92-832-2440-2 |edition=4th |volume=11 |url=https://publications.iarc.fr/Book-And-Report-Series/Who-Classification-Of-Tumours/WHO-Classification-Of-Skin-Tumours-2018 |language=en |chapter=2. Melanocytic tumours:Nevus spilus |pages=87–88 }}