|Year : 2000 | Volume
| Issue : 3 | Page : 156-157
Solitary Papular Angiokeratoma Overlying Common Blue Naevus
K Chakravarty, M Chanda
Source of Support: None, Conflict of Interest: None
A 12-year old boy had a bluish black nodule since birth. At the age of 10, the lesion become warty following a trauma. Diagnosis was made on histopathological examination.
Keywords: Common blue naevus, Solitary papular angiokeratoma
|How to cite this article:|
Chakravarty K, Chanda M. Solitary Papular Angiokeratoma Overlying Common Blue Naevus. Indian J Dermatol Venereol Leprol 2000;66:156-7
|How to cite this URL:|
Chakravarty K, Chanda M. Solitary Papular Angiokeratoma Overlying Common Blue Naevus. Indian J Dermatol Venereol Leprol [serial online] 2000 [cited 2019 Jun 17];66:156-7. Available from: http://www.ijdvl.com/text.asp?2000/66/3/156/4907
| Introduction|| |
Common blue naevus (CBN) and solitary papular angiokeratoma (SPA), both are not rare diseases. CBN is a dermal melanocytic naevus produced by aberrant collection of pigmentproducing but benign melanocytes. It may be present at birth but commonly appear in childhood and adult life. SPA has the appearance of a blue-black warty papule, generally between 2-10 mm, often with a history of preceding trauma.  The occurrence of SPA in a superimposed form is rare. We are reporting the case for its rarity.
| Case Report|| |
A 12-year-old boy presented with an asymptomatic bluish black warty nodule of 1 cm. in diameter on the dorsum of right hand. A small smooth-surfaced asymptomatic bluish papule was present there since birth. The lesion was progressing very slowly. At the age of 10, he received a cut injury on the lesion which healed in a usual way. After a few months, the lesion started growing in size and became warty. At the age of 11, he had a thorn prick on the lesion which resulted in profuse bleeding. Other systems were normal. All routine investigations were within normal limits. Excision biopsy was done under local anaesthesia without any recurrence.
Histopathological examination revealed hyperkeratosis, papillomatosis, acanthosis and dilated capillaries in the papillary dermis which were partially enveloped by elongated rete ridges. Melanocytes were elongated, slender, slightly wavy and were seen in groups in mid and lower dermis. Melanocytes were filled with fine granules of melanin. Melanophages were also present near the bundles of melanocytes. [Figure - 1]
| Discussion|| |
CBN occurs as small, slightly raised, nodular, smooth surfaced slate blue or black lesion. The lesion is usually 2-10 mm and rarely exceeds 1 cm. in diameter. It occurs most frequently on or near the dorsum of hand, foot and also on face but may be found on any site.  Usually there is a single lesion. The onset may be at birth or in adulthood. Progressive growth is rare.
SPA is a small dark red to blue black papule or nodule which occurs predominantly on leg. It appears between the ages of 10 and 40 years. SPA is almost certainly an acquired disorder, probably arising as a response to trauma rather than being developmental anomaly. It is a talangiectasia but is not a true haemangioma. 
In this patient, an acquired disease developed on a congenital disorder following trauma.
Surgical excision is the best approach for removal of the lesion.
| References|| |
|1.||Imperial R, Helwig EB. Angiokeratoma : a clinico-pathological study. Arch Dermatol 1967; 95: 166-175. [PUBMED] |
|2.||Dorsey CS. Montgomery H. Blue naevus and its distinction from Mongolian spot and the naevus of Ota. J Invest Dermatol 1954; 22: 225-236. |
|3.||Lever WF, Lever GS. Benign melanocytic tumours and malignant melanoma. In: Histopathology of Skin, 7th ed, JB. Lippincott, Philadelphia 1990; 19: 712-722. |
[Figure - 1]