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is a significant concern for physicians. Central9 o; U5 a; s# L5 H" Z0 i- @
precocious puberty (CPP), which is mediated
. o+ V5 ~8 j+ {$ X$ Vthrough the hypothalamic pituitary gonadal axis, has; H# v0 M1 G$ c: H( Y# w8 @2 m
a higher incidence of organic central nervous system6 |7 E8 j; _# i/ t5 o
lesions in boys.1,2 Virilization in boys, as manifested1 X4 p' z, ?9 v9 g
by enlargement of the penis, development of pubic
4 h, v; z, [) l+ Yhair, and facial acne without enlargement of testi-
4 H( n! X) E& {7 f% x2 F2 q3 Xcles, suggests peripheral or pseudopuberty.1-3 We9 P! y2 n7 v" J$ y: {/ J0 X2 w) J
report a 16-month-old boy who presented with the
* j8 x* p: J- o7 j' Wenlargement of the phallus and pubic hair develop-
4 _+ K( ^% V; U8 W3 s8 [' C+ Yment without testicular enlargement, which was due
, A K# C" c8 i- s! pto the unintentional exposure to androgen gel used by
( b2 r* [ M8 T+ J! h a5 Ithe father. The family initially concealed this infor-
# e0 k5 ~# Z7 q. D( W' j6 Kmation, resulting in an extensive work-up for this& G: F c. a( L3 l# c, f$ }, F
child. Given the widespread and easy availability of
& K$ a6 \, w: K8 ztestosterone gel and cream, we believe this is proba-
6 W- D! h1 G5 x: T1 _bly more common than the rare case report in the
{7 ^3 [ \( ?! M( H& Oliterature.4/ Z: f3 }; F5 m$ }; E0 t5 `3 ]
Patient Report
1 v6 ?# U4 {8 P; a* s; XA 16-month-old white child was referred to the4 [, I1 ^) r& ~
endocrine clinic by his pediatrician with the concern9 I: ?3 V+ B7 p# d: c3 B4 K' D
of early sexual development. His mother noticed- ? }) `# f, Q v4 E3 j' u
light colored pubic hair development when he was1 f# T( E4 o# q5 O7 ~9 x
From the 1Division of Pediatric Endocrinology, 2University of
# N4 e$ f6 r: C2 o2 BSouth Alabama Medical Center, Mobile, Alabama.& s% f+ e+ o2 T
Address correspondence to: Samar K. Bhowmick, MD, FACE,9 j; P4 p/ S$ R$ |) _+ }9 O
Professor of Pediatrics, University of South Alabama, College of
0 s. ]2 \0 J5 W, TMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
( u5 n! U5 E+ n+ Xe-mail: [email protected].+ R2 Y4 \7 _/ a; c
about 6 to 7 months old, which progressively became# |( n/ t7 J6 P" U
darker. She was also concerned about the enlarge-: o# O0 [' X) ?6 g
ment of his penis and frequent erections. The child: k, c/ D9 ]6 U: e- L
was the product of a full-term normal delivery, with
1 x: e/ P+ l4 |4 P* I c$ ]a birth weight of 7 lb 14 oz, and birth length of5 _3 P0 r7 U- D7 [. f
20 inches. He was breast-fed throughout the first year
6 E9 N9 e: h4 a8 s( d* Aof life and was still receiving breast milk along with
! R8 o; u2 L4 B3 s- W/ h: I1 Dsolid food. He had no hospitalizations or surgery,
6 q) b5 `$ ]9 ^; Hand his psychosocial and psychomotor development ^6 N, Y& l6 _% }, {5 b/ q
was age appropriate. k$ y$ v3 q! S+ D/ X$ s: c. J9 F" B
The family history was remarkable for the father,) s% K* _" v0 |, W
who was diagnosed with hypothyroidism at age 16,* |, `& A" U6 U5 N& [
which was treated with thyroxine. The father’s" O7 s" S, n* Q% X! N' X
height was 6 feet, and he went through a somewhat
. {8 A. K' g7 @! r' i7 D& n1 ^' Dearly puberty and had stopped growing by age 14.; K$ w- N: e1 L- k V7 b/ v
The father denied taking any other medication. The) J* o# ?$ U2 m# ~, x" X% k
child’s mother was in good health. Her menarche
" j6 E! I; y/ A7 N2 vwas at 11 years of age, and her height was at 5 feet+ Y* d. p: n* K9 |& P/ ?$ K8 ?" ~0 @3 v
5 inches. There was no other family history of pre-
7 Z6 w# Z1 C/ |2 Z& d9 U+ Ecocious sexual development in the first-degree rela-# v4 l- s& k# `/ U) R; Q* l
tives. There were no siblings.
$ d) ?' r' c" S" j( ~) KPhysical Examination
, x+ F* ?5 N: r( [) I* l& h- |The physical examination revealed a very active,: q: `6 Y* B Z! H% H3 C5 @: f4 L
playful, and healthy boy. The vital signs documented% F- x* t) m* x, M
a blood pressure of 85/50 mm Hg, his length was
) f2 E4 ?, \6 ]- K90 cm (>97th percentile), and his weight was 14.4 kg
4 t! [* ~+ x5 A& s(also >97th percentile). The observed yearly growth8 Q A; ?$ S" Z2 R
velocity was 30 cm (12 inches). The examination of
3 M. e/ J4 N* T: q% T$ X2 W7 cthe neck revealed no thyroid enlargement.. ]9 S3 J/ h" K* {0 `
The genitourinary examination was remarkable for; D4 g. X: T4 J: q
enlargement of the penis, with a stretched length of$ i) n: R. }5 Z/ ~- i' s) ?
8 cm and a width of 2 cm. The glans penis was very well0 I, B) R+ [+ G8 R, Q: g- J2 @
developed. The pubic hair was Tanner II, mostly around3 N3 y8 I1 H$ J7 f3 z ~1 n
540
' ?0 }* d1 I" C/ u' N. T5 K( K) |at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from' r' c i5 ~: Q
the base of the phallus and was dark and curled. The
( d4 D5 Q" }5 A! p0 {$ ?) b% Dtesticular volume was prepubertal at 2 mL each.0 U5 ? G' ?7 C3 t2 j* M8 O
The skin was moist and smooth and somewhat
- D" N1 e. |) O8 z6 coily. No axillary hair was noted. There were no- g. J) ]+ W; t& o3 |! N2 v2 A
abnormal skin pigmentations or café-au-lait spots.
7 Z {' ^- f7 f3 a3 x2 iNeurologic evaluation showed deep tendon reflex 2+
! R/ \' Z9 k; `+ |6 t4 Abilateral and symmetrical. There was no suggestion
+ L3 N( _# L/ l' S" _. T1 mof papilledema.$ @' S/ ~ Q+ ~% j O5 N
Laboratory Evaluation! F) o _$ j3 i) Q% m
The bone age was consistent with 28 months by
. r+ x3 B# D- \, e/ w# {using the standard of Greulich and Pyle at a chrono-
! ]' C- \1 X) z6 P9 plogic age of 16 months (advanced).5 Chromosomal
2 M' B, Z4 u/ V$ C n0 ]karyotype was 46XY. The thyroid function test4 @1 q b% L3 M4 @
showed a free T4 of 1.69 ng/dL, and thyroid stimu-! k" H, Z+ G0 h& A" Y
lating hormone level was 1.3 µIU/mL (both normal).
0 _& E2 E( D5 i) _4 v" d, NThe concentrations of serum electrolytes, blood" \. f6 o, {$ d) D' t, \1 G
urea nitrogen, creatinine, and calcium all were
0 N& m; R" J5 }' u' Swithin normal range for his age. The concentration9 b& q. A* `3 s- U# `7 h3 O
of serum 17-hydroxyprogesterone was 16 ng/dL# G) d, D+ h5 }7 n# ~ V; G
(normal, 3 to 90 ng/dL), androstenedione was 207 q o. u$ K* Y" c
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
5 m( x' P; \" t/ h; kterone was 38 ng/dL (normal, 50 to 760 ng/dL),
4 R/ b+ D$ |0 D3 S3 fdesoxycorticosterone was 4.3 ng/dL (normal, 7 to
# J ]6 u( U& T4 d4 @% L' Z49ng/dL), 11-desoxycortisol (specific compound S)
) @) j/ P8 ~5 O/ n1 vwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
+ N/ @: `; `! ? A: }' M \tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
n/ D$ o9 i7 |- m2 Etestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
& K* m1 l+ [* q* D; U% kand β-human chorionic gonadotropin was less than. }1 j8 F3 b0 ~& g' ?
5 mIU/mL (normal <5 mIU/mL). Serum follicular6 c3 y/ |9 }$ Q! w1 z$ h: u2 I# d1 S
stimulating hormone and leuteinizing hormone. b7 o- O/ D: w! P2 o5 g
concentrations were less than 0.05 mIU/mL
; K& ]1 X# Q" a5 Z" I(prepubertal).
$ A+ O2 B0 ?; F7 E- A* M" N; B' uThe parents were notified about the laboratory1 t* @2 K; z; |. F3 \" ^
results and were informed that all of the tests were
: n& H8 Z1 W3 N6 S- P8 unormal except the testosterone level was high. The
4 g, k5 _- k$ w* f" q4 B( c! gfollow-up visit was arranged within a few weeks to" V( O, ?7 i, r
obtain testicular and abdominal sonograms; how-/ \% {& p v! \2 {# P$ Z! F# L4 f
ever, the family did not return for 4 months.2 ?" m( D9 Y$ t1 |% p6 Z
Physical examination at this time revealed that the* t: Z4 W, a* a
child had grown 2.5 cm in 4 months and had gained6 f4 H o# i) g* M& {, y! O0 ~8 i
2 kg of weight. Physical examination remained( a1 w$ i) h6 c q2 o$ z- Z; y- ?
unchanged. Surprisingly, the pubic hair almost com-
$ g* k# J7 K) c* S1 z- c, wpletely disappeared except for a few vellous hairs at; Y- K+ w* A3 i1 A) z' w
the base of the phallus. Testicular volume was still 2
2 T" A3 ^7 g. MmL, and the size of the penis remained unchanged.
# y1 {& W& ^: @4 b) gThe mother also said that the boy was no longer hav-, O1 a* R4 f! T
ing frequent erections.
& n& x' U' d+ m. ^: t2 ABoth parents were again questioned about use of
# h4 `- P5 C3 y2 _: Wany ointment/creams that they may have applied to0 `; b. l9 m' r/ r9 Z$ C, W9 l
the child’s skin. This time the father admitted the2 R- ^5 I) j; G& P. e* |0 Q
Topical Testosterone Exposure / Bhowmick et al 541
. @- F* H! s) p0 euse of testosterone gel twice daily that he was apply-
' n" W2 T/ O3 V0 x4 \- {ing over his own shoulders, chest, and back area for
/ c1 z. q& `1 R8 Va year. The father also revealed he was embarrassed
% V: F1 @/ ]- o5 vto disclose that he was using a testosterone gel pre-
: I5 Z) x* b% Pscribed by his family physician for decreased libido$ e4 n& w7 d$ k T4 `- h
secondary to depression.
b( u; ~3 u1 U9 a1 T# ]6 J& lThe child slept in the same bed with parents.
* l7 e* A& i7 {7 ^9 C9 {. Y- UThe father would hug the baby and hold him on his0 j6 f# w1 j0 g
chest for a considerable period of time, causing sig-
/ O, h( i; x) S" f% u5 j9 b* i" rnificant bare skin contact between baby and father.
) l4 f$ b! M4 B( M$ r0 uThe father also admitted that after the phone call,1 W& T# U! v6 D6 Q
when he learned the testosterone level in the baby
( T: @7 O; P. z+ t# x `, B) Twas high, he then read the product information7 [ q- u& P; B: c
packet and concluded that it was most likely the rea-
9 @2 Q: \& U' a+ ]son for the child’s virilization. At that time, they! b* v3 J5 P, Q- W1 a/ B
decided to put the baby in a separate bed, and the
0 |* f2 K9 B% S: ], E( Bfather was not hugging him with bare skin and had
9 T; u; d: D3 h# \/ ? B! R" w$ J( cbeen using protective clothing. A repeat testosterone, ?6 V) D3 B" z5 z& E( u& q" a
test was ordered, but the family did not go to the
$ t2 O6 U) m3 H7 E; f- Y9 L' flaboratory to obtain the test.
! ?- L' O, m& C+ t% x, WDiscussion9 P5 W% K9 I' m
Precocious puberty in boys is defined as secondary
- B1 b# ] x, T$ qsexual development before 9 years of age.1,4
2 _4 c% g* b' R2 o5 v7 z9 ~Precocious puberty is termed as central (true) when
2 \" B: W( F0 y6 Z7 Nit is caused by the premature activation of hypo-# i& j- A' [! b+ K8 T
thalamic pituitary gonadal axis. CPP is more com-
2 f }- v1 Q( c3 q7 \+ j* xmon in girls than in boys.1,3 Most boys with CPP3 v# L! D$ b2 I$ V/ e8 J
may have a central nervous system lesion that is
1 ]2 l0 ~& z$ P2 I" z( x# G# Bresponsible for the early activation of the hypothal-# \1 Y/ N" C! P0 B
amic pituitary gonadal axis.1-3 Thus, greater empha-3 H, }, x& E+ j- J) d
sis has been given to neuroradiologic imaging in
, \7 Z, r* w9 t% N% Cboys with precocious puberty. In addition to viril-
# _' \. n8 v1 dization, the clinical hallmark of CPP is the symmet-
& ^& b' {' m1 ]& p1 Yrical testicular growth secondary to stimulation by
5 B4 q: C- Y- ?5 ygonadotropins.1,3- _$ K8 w' r) K6 ?5 J
Gonadotropin-independent peripheral preco-
0 u5 |5 f- a" G6 t n9 X5 A$ ]" ecious puberty in boys also results from inappropriate6 q2 b- r( K: S1 I! q. M7 p0 [- v
androgenic stimulation from either endogenous or& o, S T, G3 n$ N( a2 e
exogenous sources, nonpituitary gonadotropin stim-' V/ T& e. n" ^' w& K' J
ulation, and rare activating mutations.3 Virilizing& C6 @* t/ O1 f7 F( o( x$ T
congenital adrenal hyperplasia producing excessive
! s8 ]* c( H7 {# h9 O9 v$ ^adrenal androgens is a common cause of precocious/ D( e3 _+ g1 B& `' i8 d9 h! |
puberty in boys.3,4
7 G A. ?) M( z2 N2 cThe most common form of congenital adrenal: b) u- V/ v. H6 z) R h3 T- R H6 T6 I1 \
hyperplasia is the 21-hydroxylase enzyme deficiency.
% N$ I; g' ^- R' CThe 11-β hydroxylase deficiency may also result in
1 H3 }8 A, T C# W& B) Yexcessive adrenal androgen production, and rarely,2 A4 G0 S1 D' M. s
an adrenal tumor may also cause adrenal androgen
# }- B. j: @$ y$ d# Hexcess.1,36 N0 ]5 O- u5 {8 g
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from1 z# i9 m" E8 `5 W' `. Y
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007% V5 U& n* W) V4 l) B5 U
A unique entity of male-limited gonadotropin-
2 k4 j) f6 R1 I# z! f; }( i. H7 \independent precocious puberty, which is also known3 A1 G6 o7 U2 b/ y2 a
as testotoxicosis, may cause precocious puberty at a
8 x# o/ G7 K( P1 I6 uvery young age. The physical findings in these boys4 V/ p6 r" z( w0 e5 T+ a
with this disorder are full pubertal development," K* y5 m, X# l/ [
including bilateral testicular growth, similar to boys8 u- t1 p0 ^7 }
with CPP. The gonadotropin levels in this disorder
4 n0 [& R. }2 R7 O. i0 V+ b5 x0 W5 ware suppressed to prepubertal levels and do not show
n+ m W1 N+ @( bpubertal response of gonadotropin after gonadotropin-' m m( D: ^" x0 A
releasing hormone stimulation. This is a sex-linked# p6 [# x; I8 u3 [
autosomal dominant disorder that affects only
, Q4 W( r% t8 Y5 }9 N. h; M% Mmales; therefore, other male members of the family4 i0 l7 [* a" |. P5 a
may have similar precocious puberty.3
! G; D) d- o3 Y5 N; y1 \2 MIn our patient, physical examination was incon-: j/ x: w4 [9 T8 c& _# t7 C
sistent with true precocious puberty since his testi-/ t4 m1 [: p6 S! E* k
cles were prepubertal in size. However, testotoxicosis
$ X2 V% l/ R4 q' ]/ b8 Z: r! A& ^was in the differential diagnosis because his father0 \& V1 Y4 B: a) o' j0 j( Y. j0 U
started puberty somewhat early, and occasionally,7 j" u2 ~7 W5 y; V5 y# Y! X
testicular enlargement is not that evident in the8 \: l/ M: n/ @8 o( p
beginning of this process.1 In the absence of a neg-% g! I) }$ v% ]( ^
ative initial history of androgen exposure, our
8 k4 B- D8 J8 s2 @) W/ kbiggest concern was virilizing adrenal hyperplasia,
4 p' m- D/ o" o9 Peither 21-hydroxylase deficiency or 11-β hydroxylase
! w0 e5 p) v7 m( X/ `1 udeficiency. Those diagnoses were excluded by find-
' b1 S: P# l) c& _$ zing the normal level of adrenal steroids.
2 o. e6 {: |/ X2 \) ^' r& ]5 Q6 [The diagnosis of exogenous androgens was strongly! e% q. L% G' i& b6 h6 }3 F$ b
suspected in a follow-up visit after 4 months because5 G [( Y- z" T& A8 l; k& q3 G
the physical examination revealed the complete disap-
) R+ p N* }6 u! Bpearance of pubic hair, normal growth velocity, and
* G4 u4 \1 Z _- D" o/ Rdecreased erections. The father admitted using a testos-
0 D5 V+ e' V) {0 k; dterone gel, which he concealed at first visit. He was
% d, ?6 h8 i4 F( g$ Kusing it rather frequently, twice a day. The Physicians’$ |- `+ k( {' D$ t3 o2 _: G
Desk Reference, or package insert of this product, gel or
- ~' z- i: X, W1 F4 acream, cautions about dermal testosterone transfer to1 M: C- l# _: ?/ R$ @
unprotected females through direct skin exposure.
3 o* P% P8 c o) k: bSerum testosterone level was found to be 2 times the; o# e) b) y" \4 O8 L8 K3 o
baseline value in those females who were exposed to
) n0 K; q I% W7 B: Ueven 15 minutes of direct skin contact with their male/ _8 p! c/ k9 E& C1 z' A
partners.6 However, when a shirt covered the applica-
4 ~. {/ d2 H. H, `( o" `tion site, this testosterone transfer was prevented.
! b' [. h" ?' v, Z- h" q3 N: w: v- nOur patient’s testosterone level was 60 ng/mL,
O- g9 Z- ^7 ^" S; p( e& kwhich was clearly high. Some studies suggest that- b8 X0 ]6 D2 t0 {% |
dermal conversion of testosterone to dihydrotestos- O, `. n* {( e" Q
terone, which is a more potent metabolite, is more, ] [3 g" b( p
active in young children exposed to testosterone
2 }, @: ^+ I2 J7 rexogenously7; however, we did not measure a dihy-
7 s1 o, C; y; Q! G* }) t8 ydrotestosterone level in our patient. In addition to! v$ ?( x6 F: x& a+ q' Q6 X0 p: ?
virilization, exposure to exogenous testosterone in$ {2 L& n& `3 V) e) M% V
children results in an increase in growth velocity and
& i# x) R$ G: Kadvanced bone age, as seen in our patient./ |2 k3 J6 k: R$ A' y
The long-term effect of androgen exposure during) K0 ~& g( w/ ^5 n: v# ]
early childhood on pubertal development and final
9 s, [" N! `! `5 g* Oadult height are not fully known and always remain
5 z/ \% M! u% l/ Z( N# W da concern. Children treated with short-term testos-
$ ~" e+ ^* s; ~8 {2 Lterone injection or topical androgen may exhibit some5 J2 Z* l+ F$ a# X) ~5 t" u
acceleration of the skeletal maturation; however, after; m* o0 U$ }+ S. {3 @ x
cessation of treatment, the rate of bone maturation" q2 [: X6 v4 ~% V4 l/ g! l2 K
decelerates and gradually returns to normal.8,9/ M; y5 [8 V$ c* B6 j
There are conflicting reports and controversy
! U1 [8 h' d! ]. S3 ?over the effect of early androgen exposure on adult; k) Y; x: _5 G8 d( o+ j9 ~! ~
penile length.10,11 Some reports suggest subnormal
6 J0 ?! b- Q$ A( c1 T3 Kadult penile length, apparently because of downreg-+ J& N+ f. ]8 j8 |
ulation of androgen receptor number.10,12 However,; q1 Q6 x/ x2 K, k5 U
Sutherland et al13 did not find a correlation between
8 I- c+ h& F5 o+ p9 Schildhood testosterone exposure and reduced adult
( ^! i. P- O4 c1 }0 I/ V9 f \. u! lpenile length in clinical studies.: g% K$ @4 a- ]+ D1 ^* ^
Nonetheless, we do not believe our patient is3 N4 S3 n. {: z7 ~1 C
going to experience any of the untoward effects from( @3 z5 V+ Q$ e( M) b/ R
testosterone exposure as mentioned earlier because9 s3 k" R' N; Q) O- ^8 [1 u
the exposure was not for a prolonged period of time.
: h3 E3 D4 _% L% O! C& NAlthough the bone age was advanced at the time of. d: w/ O# E! A1 l2 f/ Y" y
diagnosis, the child had a normal growth velocity at& S9 s$ h4 ]/ Q' @3 G" U, G0 Y
the follow-up visit. It is hoped that his final adult! S9 H; D+ q1 H: e) S
height will not be affected.' w5 w5 v+ K" z
Although rarely reported, the widespread avail-# E6 }: H. Y9 o0 l" y
ability of androgen products in our society may
v/ L4 c% C4 h2 V% L, b# }indeed cause more virilization in male or female
+ }+ S$ C* d5 d2 A: F0 I& ?7 cchildren than one would realize. Exposure to andro-& o1 D9 Q4 `# S# A9 ~
gen products must be considered and specific ques-
1 k$ [7 P3 x \$ o$ l2 Btioning about the use of a testosterone product or: J" M2 W! l2 c) d) T, ^
gel should be asked of the family members during* X# n( e3 i: ^, w1 r
the evaluation of any children who present with vir-
( g; x! P* H8 [: Bilization or peripheral precocious puberty. The diag-; [2 M0 s" Y: x: p' k4 P
nosis can be established by just a few tests and by
0 `5 Q) O2 b7 _7 Aappropriate history. The inability to obtain such a( v6 I& B% k# l2 r6 O
history, or failure to ask the specific questions, may
4 z+ h" @- E% r6 O8 y+ Xresult in extensive, unnecessary, and expensive$ c7 b5 Q3 b! ]' R, s/ J9 p7 b. f0 l/ A
investigation. The primary care physician should be
E( y6 \. f5 Qaware of this fact, because most of these children
& |% V1 G$ t$ X3 [2 ]may initially present in their practice. The Physicians’; z+ t/ j/ G( B0 k! V' G
Desk Reference and package insert should also put a9 Q: I! q, v- P& x3 s4 ]
warning about the virilizing effect on a male or* \) @) M! F2 t0 y" ^5 j$ Y& N. ^
female child who might come in contact with some-
' O' ?0 [7 s h* O! h3 d/ Xone using any of these products.
3 z9 q( {9 G5 g# h% A& Z8 h {* YReferences0 M+ a/ w- E4 B5 t- U. h6 E9 P
1. Styne DM. The testes: disorder of sexual differentiation
& X5 K' M2 c0 k9 _1 G/ kand puberty in the male. In: Sperling MA, ed. Pediatric9 z2 _) i5 T( ?9 n1 v( v3 `8 y: A
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;' L+ [) |$ z; Z: h! I `
2002: 565-628.
# e) F8 g `+ t; I9 W' ^, v* j- @3 W2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious/ b4 m! R: \4 l/ j$ B
puberty in children with tumours of the suprasellar pineal
" q% _. k& |+ Y" k5 dat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from9 [/ m0 p5 U7 ]1 [
Topical Testosterone Exposure / Bhowmick et al 543' x/ ~+ O4 o. v. f9 n' ~
areas: organic central precocious puberty. Acta Paediatr.
6 Q/ ^5 V% V" l6 ^8 Q2001;90:751-756.
1 c6 [* _. e2 M8 m: y3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.9 J. J7 I' M) n) u* k2 a- v$ C1 ]8 [
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
2 S" R4 q6 C( v& P# aDekker Inc; 2003:211-238.
" v, \- a* y! n* h4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual" u6 v! o# J" x. t; O9 A
development in a two-year-old boy induced by topical' k6 ]& R/ z V v1 X7 S
exposure to testosterone. Pediatrics. 1999;104:e23.# l6 b7 {- g4 q# V
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of& r7 O: p, d! u0 E0 r
Skeletal Development of the Hand and Wrist. 2nd ed.
; {! @5 w+ `! b$ X/ G2 nStanford, CA: Stanford University Press; 1959.
" `' v( M2 n9 n& R6. Physicians’ Desk Reference. Androgel 1% testosterone,
! D F/ |/ \8 [5 ]" b1 NUnimed Pharmaceutical Inc. Montvale, NJ: Medical$ I" e" p( L; w5 o
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