Forty-two prepubertal children presenting with anogenital (AG) warts (
15 boys and 27 girls) were prospectively followed up (mean 15.9 months
, SD 12.24). Most (73.8%) of these children had perianal condylomatous
-type warts and 11 (26.2%) had concurrent non-genital (NG) warts. None
had any other AG infections or sexually transmitted disease (STD). Tw
elve (28.6%) children acquired their AG warts by vertical transmission
from an infected maternal birth canal, 3 (7.1%) by autoinoculation fr
om common hand warts and 2 children (4.8%) through sexual abuse. In th
e remaining 25 children (59.5%) mode of acquisition of AG warts was un
certain but not thought to be sexual. Human papilloma virus (HPV) DNA
(types 6/11, 16/18 or 31,33,35-31+) was detected in 10/32 (31.3%) of A
G warts biopsied from these children, types 6/11 in the majority of po
sitive biopsies (9/10). Detection of HPV DNA (types 6/11, 16/18 or 31) in a child's AG warts was significantly associated with either verti
cal or sexual transmission (P < 0.02). Thirty-one children had their w
arts treated with a combination of scissor excision and electrocautery
under general anaesthesia. Warts recurred in 10 (31.4%) of these chil
dren all within 4 months following treatment. Spontaneous resolution o
f AG warts was seen in 9 (21.4%) children. Of 42 children with AG wart
s 10 (23.8%) had at least one adult family member with AG warts, 13 (3
6.9%) an adult family member with another AG infection or STD, and 23
(62.2%) had a mother with cervical intraepithelial neoplasia (CIN). Tw
enty (47.6%) of these children had a family member with NG warts. Thes
e findings suggest (a) the majority of children with AG warts do not a
cquire these sexually, (b) vertical transmission is an important means
by which young children acquire AG warts, (c) household members of ch
ildren with AG warts should be routinely screened for NG and AG warts,
CIN lesions (mothers only) and other AG infections or STDs (adults on
ly), (d) HPV typing of AG warts in children may help to clarify their
mode of transmission, (e) spontaneous resolution of AG warts in childr
en does occur, (f) scissor excision combined with electrocautery is a
safe and efficacious treatment for AG warts in children.