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is a significant concern for physicians. Central' s( [6 O, i! ]) N
precocious puberty (CPP), which is mediated0 o9 g* b- M$ I0 K
through the hypothalamic pituitary gonadal axis, has/ r" U# {3 H8 E# A: g
a higher incidence of organic central nervous system$ b7 a' C$ c% c+ L+ b
lesions in boys.1,2 Virilization in boys, as manifested4 _* d- v3 E; X5 R) t
by enlargement of the penis, development of pubic
; P1 A) I$ r+ p! p2 }2 M$ {hair, and facial acne without enlargement of testi-0 f) W7 x v1 E: w" k: F# B. d' [
cles, suggests peripheral or pseudopuberty.1-3 We. [( b" ` ]$ Z0 o* W* G
report a 16-month-old boy who presented with the6 _# ]& K; z1 K2 t% ]7 H! |
enlargement of the phallus and pubic hair develop-
6 D& ^3 Y3 q6 ?- t: W/ |) h9 ~8 Gment without testicular enlargement, which was due
' f( s b/ |, `+ z4 bto the unintentional exposure to androgen gel used by
: M2 h' t" x5 n% \; R8 wthe father. The family initially concealed this infor-( {; G3 j/ K- B( ]: G
mation, resulting in an extensive work-up for this
& |. h. x( q5 l3 m( Kchild. Given the widespread and easy availability of, q+ o! [; k3 C0 P
testosterone gel and cream, we believe this is proba-
3 v* I" M+ u5 s1 h$ b0 O* Kbly more common than the rare case report in the9 P$ Y" A7 D' W3 F( N8 J
literature.4) R9 S' | \4 c1 l" V5 m
Patient Report
6 C0 d( L! E; ~" q( c" F$ F1 oA 16-month-old white child was referred to the. }4 k' n) }$ y7 a( _" L5 k, b; Q- c
endocrine clinic by his pediatrician with the concern
8 U; K1 L/ p0 w3 a$ e* C% W& {, \* Eof early sexual development. His mother noticed
, W5 m( O# E4 f4 I4 {& k& [light colored pubic hair development when he was
+ y/ g4 K/ ?/ N- ~: H1 h0 W" tFrom the 1Division of Pediatric Endocrinology, 2University of# `/ b" ?+ \ g7 l& N! W
South Alabama Medical Center, Mobile, Alabama.' _1 B1 `2 y2 F8 M7 z
Address correspondence to: Samar K. Bhowmick, MD, FACE,% @$ n6 G; o% W \2 r
Professor of Pediatrics, University of South Alabama, College of2 B2 c1 _! }# C) ^/ b+ C
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;) R& T/ H5 L" g7 \
e-mail: [email protected].
: \5 J# u8 g0 H4 y' Labout 6 to 7 months old, which progressively became( b, V+ M: H8 Z4 r* l
darker. She was also concerned about the enlarge-' [# V! `. C% @
ment of his penis and frequent erections. The child0 v" q+ k; I& P1 c) l k
was the product of a full-term normal delivery, with8 F* S0 }6 l2 _% ?, b
a birth weight of 7 lb 14 oz, and birth length of( i$ e0 G' D2 E4 f3 }* B
20 inches. He was breast-fed throughout the first year
+ f- S8 {" |# S+ w' Uof life and was still receiving breast milk along with% B& C8 ^! o) A1 ?6 I
solid food. He had no hospitalizations or surgery,
/ [- s$ T2 `; V* {- a" {; Oand his psychosocial and psychomotor development6 _: B9 d2 `0 E: Q% L
was age appropriate.
7 a: n) j5 M$ M( DThe family history was remarkable for the father,. c2 L; O) G6 w
who was diagnosed with hypothyroidism at age 16,
& w* v$ R4 p0 n6 ^/ c- M Cwhich was treated with thyroxine. The father’s
; y5 I4 u4 S2 @$ E0 }: C; Z6 O: oheight was 6 feet, and he went through a somewhat: @9 ~) G3 B$ a7 _
early puberty and had stopped growing by age 14.
+ F# D) `& p( TThe father denied taking any other medication. The
; h1 o' F t( o. s% b% x& E/ s* ^child’s mother was in good health. Her menarche& p; X* p# y. w* Q1 D
was at 11 years of age, and her height was at 5 feet+ \4 j' _9 U9 k5 M% F
5 inches. There was no other family history of pre-
6 W' m" L/ s5 w5 k1 v9 f3 Wcocious sexual development in the first-degree rela-
4 {7 E& S4 t7 W4 i- B, U. K: [tives. There were no siblings.
0 Q% {, O: \# Q$ F+ a0 CPhysical Examination
9 A# B0 {/ ]( H" U B- N: X! q( ^7 CThe physical examination revealed a very active,/ _- f L1 U: O! S! z$ q. B
playful, and healthy boy. The vital signs documented$ Y4 v7 E p! q% p0 R2 N
a blood pressure of 85/50 mm Hg, his length was
6 H& ]$ Q3 @$ x6 {- C90 cm (>97th percentile), and his weight was 14.4 kg
( Q1 B+ F% @) v" f2 D(also >97th percentile). The observed yearly growth' R2 I1 G- v' P
velocity was 30 cm (12 inches). The examination of
3 Y: [( Y5 D. g6 cthe neck revealed no thyroid enlargement.
, D& c/ X* L3 u8 hThe genitourinary examination was remarkable for
4 q) p! ?! X( l$ _5 U- A7 c/ {6 e7 p2 nenlargement of the penis, with a stretched length of6 F* y5 M) o6 p e$ k. p( b
8 cm and a width of 2 cm. The glans penis was very well
/ B$ n( p N4 U+ ^developed. The pubic hair was Tanner II, mostly around
; X. T& F3 V, Z9 U, V+ \8 x540
- @( S5 e. Y( h: A% w; w$ lat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
! z8 h# ~2 ~: l3 P( rthe base of the phallus and was dark and curled. The/ q. D0 E5 c* v
testicular volume was prepubertal at 2 mL each., `6 B! D2 X8 J1 `4 c
The skin was moist and smooth and somewhat
" w+ U V$ i+ toily. No axillary hair was noted. There were no
5 |4 U/ d9 y. Y! F+ l; Y) Y6 Y( k# {abnormal skin pigmentations or café-au-lait spots., l5 `0 p0 O& }. h$ X( W9 \
Neurologic evaluation showed deep tendon reflex 2+( \ K% I$ f4 H Y- ^) F
bilateral and symmetrical. There was no suggestion0 c) v) _# l% _! L4 E
of papilledema.+ }7 D0 _" F9 ]$ Z: E! d
Laboratory Evaluation
& N5 j7 y+ D4 IThe bone age was consistent with 28 months by0 `2 @0 S. C. W! ^( D" K
using the standard of Greulich and Pyle at a chrono-
3 h" y7 @+ k7 h: e* d7 ~7 o8 Mlogic age of 16 months (advanced).5 Chromosomal7 l8 H# ]( ~ r$ k
karyotype was 46XY. The thyroid function test$ s( x1 C% T& ]7 j1 P
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
; I* L; F: k0 A3 g2 qlating hormone level was 1.3 µIU/mL (both normal).
( u- B- \7 }. z, YThe concentrations of serum electrolytes, blood2 H% Z O$ z4 i- }
urea nitrogen, creatinine, and calcium all were
) \: I! d1 O/ m$ gwithin normal range for his age. The concentration
$ H+ `+ h% r" ]6 E- Z) f* Y5 xof serum 17-hydroxyprogesterone was 16 ng/dL# v' @; Q$ T7 i E6 {/ I% _
(normal, 3 to 90 ng/dL), androstenedione was 20
% I! L' y, F9 z8 J+ _0 o# M# jng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
* l) ^% Z' U) u, Q0 wterone was 38 ng/dL (normal, 50 to 760 ng/dL),
- O1 `" ^! C% g& ^7 y' B# I3 Fdesoxycorticosterone was 4.3 ng/dL (normal, 7 to
( D; q& T. w( D) c49ng/dL), 11-desoxycortisol (specific compound S)
( x) E# |( i3 ^- p6 Zwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-1 x9 B! F& E( b- S
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total5 _8 X( O. N- d5 [7 o: n! ]% f4 z
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
8 V* r6 l, a) j& s4 f% _and β-human chorionic gonadotropin was less than5 r$ l# U- Y% q w7 T
5 mIU/mL (normal <5 mIU/mL). Serum follicular
6 j4 g" }$ `4 e: I8 y, {stimulating hormone and leuteinizing hormone
( G4 t; C) k' Y: g/ c- Vconcentrations were less than 0.05 mIU/mL
6 z7 h, n0 C. q0 h- `8 H B(prepubertal).) ]2 v8 K& V0 ~% o6 z
The parents were notified about the laboratory3 J: ?# D! Q7 \2 M- D
results and were informed that all of the tests were
! f1 h) }; p, g( T3 e K$ Onormal except the testosterone level was high. The0 \. G6 ~$ t- o/ z7 ?5 l
follow-up visit was arranged within a few weeks to6 o' x! Y/ H. A7 p. O3 f/ \
obtain testicular and abdominal sonograms; how-: h9 _" P6 g1 ?: g0 a6 ]
ever, the family did not return for 4 months.
1 d) d3 [: R9 P4 }+ I5 o, L. mPhysical examination at this time revealed that the
: g; y: D: I U% R% g c8 Qchild had grown 2.5 cm in 4 months and had gained
3 U2 P# x" {9 r- V* A. [( B2 kg of weight. Physical examination remained* f9 r- [. u" Y7 N' J8 b* }) t& ^
unchanged. Surprisingly, the pubic hair almost com-
/ B2 l+ c* _# Z- Dpletely disappeared except for a few vellous hairs at2 H! ]. F% M, d: J' o* E
the base of the phallus. Testicular volume was still 2
, o" A& _+ u2 C% EmL, and the size of the penis remained unchanged.; d, k! }. [7 J* n( R9 O; A( B) S N
The mother also said that the boy was no longer hav-
! M" z& U7 B1 E: Eing frequent erections.
2 ^0 O3 B* {$ pBoth parents were again questioned about use of( q* H) B4 ]: U; F
any ointment/creams that they may have applied to
?- f: w' N& o+ j, H5 J4 cthe child’s skin. This time the father admitted the' W" x8 w' T0 |4 v- K: r
Topical Testosterone Exposure / Bhowmick et al 5414 h6 u% d) b: v( Z; R
use of testosterone gel twice daily that he was apply-: Q e/ ?1 x0 @
ing over his own shoulders, chest, and back area for
5 ]. {, J% H" E6 [' Ma year. The father also revealed he was embarrassed9 @0 ]3 ^% O, z: h9 o9 ^
to disclose that he was using a testosterone gel pre-3 Z( u0 G) o! _7 Q) M5 l- B, u/ K: P z
scribed by his family physician for decreased libido
- i- H" w6 b& C/ g# Asecondary to depression.% d+ U8 U/ t6 D4 c+ s: N8 \& u4 d
The child slept in the same bed with parents.
% M: p7 h! K: w. Z* X nThe father would hug the baby and hold him on his" ?6 Y M! L) v: R; x4 ?& Z$ J# Z
chest for a considerable period of time, causing sig-
6 ?4 @, N5 V7 S9 s! unificant bare skin contact between baby and father.! T# }1 V8 V( e( v W
The father also admitted that after the phone call,
5 }2 N6 u6 K" Y V* C; j- s2 s" X( @when he learned the testosterone level in the baby; I% ~) l7 h& ] J" n
was high, he then read the product information
6 m" j' l+ I6 }' b" k3 B2 ]& }' Epacket and concluded that it was most likely the rea-% N- l9 W, B8 y0 {( }) ]: q }! h
son for the child’s virilization. At that time, they
" W) @2 T* \% p% C; |% C2 ?# D a, Qdecided to put the baby in a separate bed, and the
$ k. [) m+ f6 W: I( Qfather was not hugging him with bare skin and had
2 _- J, {; ~" ?1 J( X# ?6 e0 m. hbeen using protective clothing. A repeat testosterone, C/ K* k; n# r! ?& v1 \
test was ordered, but the family did not go to the# y5 l3 ]& f8 W. E5 O. q
laboratory to obtain the test.8 U5 A5 c$ A0 m( G7 n1 \# }
Discussion1 b2 U) x- _( k: z, P+ m1 P
Precocious puberty in boys is defined as secondary
6 x7 ]2 y! y: z" i5 vsexual development before 9 years of age.1,4
# G, r2 P) s5 _+ x' f* ^- d+ y; ZPrecocious puberty is termed as central (true) when" F3 ~$ T. o2 @1 u
it is caused by the premature activation of hypo-$ ?! ~" X1 T$ e0 R5 f
thalamic pituitary gonadal axis. CPP is more com-
( b. B& j |7 ~0 S" f& W, }mon in girls than in boys.1,3 Most boys with CPP
& U7 g: k. {. H- X3 A/ f- Kmay have a central nervous system lesion that is
4 _4 c; S: d% g7 G8 aresponsible for the early activation of the hypothal-
5 l6 f5 z7 G; L' Qamic pituitary gonadal axis.1-3 Thus, greater empha-0 U1 H7 x4 S5 c7 r9 d6 }
sis has been given to neuroradiologic imaging in
8 M3 N2 \: a: b! h) V- Pboys with precocious puberty. In addition to viril-: _2 T% ^ Z' J; d! A6 ^
ization, the clinical hallmark of CPP is the symmet-
0 C) e% m5 w4 z* R) Crical testicular growth secondary to stimulation by Y! @1 Z; v: Z3 W3 P
gonadotropins.1,34 ^* b6 F! Y/ ^/ K, `: h! Z
Gonadotropin-independent peripheral preco-3 S- f' V, v$ W: Z& s2 |- J, u1 H
cious puberty in boys also results from inappropriate
& P7 H1 E6 b. I9 v: W2 \, Fandrogenic stimulation from either endogenous or
* R1 |# F! j# t, x6 F4 zexogenous sources, nonpituitary gonadotropin stim-
: z1 Q1 r; ?# I' e; r1 [ulation, and rare activating mutations.3 Virilizing
9 W% F4 J% C7 fcongenital adrenal hyperplasia producing excessive7 _, f' P5 z$ B+ u( A. i9 t( G
adrenal androgens is a common cause of precocious8 Q* `1 ]2 A% t
puberty in boys.3,4
3 p: G; }+ c1 X: [+ Z/ b; @ H+ V" \The most common form of congenital adrenal
& N) X) k0 ]5 V# l, m, O) P% |5 ehyperplasia is the 21-hydroxylase enzyme deficiency.9 U1 \! U, ]3 G, A- ]: C
The 11-β hydroxylase deficiency may also result in- d0 I" N- J% @1 z* }+ b% Z4 H
excessive adrenal androgen production, and rarely,
( m' J$ P+ l$ Q* z( S' Ban adrenal tumor may also cause adrenal androgen
5 n# i8 _4 @1 g# M( u yexcess.1,3- \0 A! L) E8 p3 N6 ]2 Q6 F( P
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
+ Y4 T$ e4 c; }) U& a. q542 Clinical Pediatrics / Vol. 46, No. 6, July 2007% m- C' h9 K1 x @" b
A unique entity of male-limited gonadotropin-
( D* p3 T8 `6 w6 Q# zindependent precocious puberty, which is also known, N0 H1 V4 w1 y, ~, r0 y. K. d
as testotoxicosis, may cause precocious puberty at a- T, j, \6 V. C# y p$ t8 Z
very young age. The physical findings in these boys
+ m! \6 R3 U' Ewith this disorder are full pubertal development,0 h9 z7 s7 y8 G+ C
including bilateral testicular growth, similar to boys
6 i+ T; T$ A. s$ Z* ewith CPP. The gonadotropin levels in this disorder7 Q' c$ t, ]& e# v. d' ^
are suppressed to prepubertal levels and do not show, z7 H4 L. K' k8 D
pubertal response of gonadotropin after gonadotropin-
: N+ T( Y2 }, l) T' freleasing hormone stimulation. This is a sex-linked1 v1 n! o! d7 }* b' H- O
autosomal dominant disorder that affects only$ m7 i- D' w; c+ d" k+ q! N1 g
males; therefore, other male members of the family
# Y* g5 H3 d' F$ j( `$ _1 vmay have similar precocious puberty.3( G" p% w6 G$ I' l: g* E) T
In our patient, physical examination was incon-
/ }9 X5 m/ \" E4 }2 c* y# g' qsistent with true precocious puberty since his testi-: Z3 k7 l0 @0 s( P s" ~
cles were prepubertal in size. However, testotoxicosis
$ z- X; M- j) A: y/ Vwas in the differential diagnosis because his father
2 y$ s$ V5 e1 `: {. H" istarted puberty somewhat early, and occasionally,4 `, `4 Q/ P+ {" X6 f2 R$ {, O
testicular enlargement is not that evident in the8 Y8 M; _0 ~9 e: n0 S! Q- V
beginning of this process.1 In the absence of a neg-
: E. _: a. R* v7 ]ative initial history of androgen exposure, our; L. w5 E! u: b4 _5 B+ \3 `% D
biggest concern was virilizing adrenal hyperplasia,7 v0 x" w5 E- x* R+ t3 G \7 { e
either 21-hydroxylase deficiency or 11-β hydroxylase
) E% c" l2 N9 R6 t! o: \$ o' adeficiency. Those diagnoses were excluded by find-
6 p. W7 N2 R6 ]! zing the normal level of adrenal steroids.
! V. I3 R; {' BThe diagnosis of exogenous androgens was strongly- S& a# |, H& n$ H) T7 ^$ k' J8 R: k
suspected in a follow-up visit after 4 months because
' X! p) S3 A8 l- Y) T( @the physical examination revealed the complete disap-. p* |$ J" P7 l( R4 D2 d! T: c
pearance of pubic hair, normal growth velocity, and4 J9 y7 {9 @9 D( g: \
decreased erections. The father admitted using a testos-
, G5 ]$ e: b2 `& Iterone gel, which he concealed at first visit. He was1 l* j9 ?* J$ ^8 X- V$ A* q, `
using it rather frequently, twice a day. The Physicians’( B1 Z$ \ q! O1 P$ }
Desk Reference, or package insert of this product, gel or, v, M/ f% f6 @
cream, cautions about dermal testosterone transfer to% O% e, ]; K _
unprotected females through direct skin exposure.
9 R0 N' |9 _( D" R# v( i" wSerum testosterone level was found to be 2 times the
0 y& W& X q( p% w2 ~3 z: A6 h `+ X% ?baseline value in those females who were exposed to
; A$ a" i! M% W3 }3 M9 [even 15 minutes of direct skin contact with their male. @: W5 J9 N( b; ~. c7 A5 h
partners.6 However, when a shirt covered the applica-
. |0 `, q9 m! ~0 @" C2 _7 t6 @tion site, this testosterone transfer was prevented.5 a* r+ |1 G" S3 v1 W( x
Our patient’s testosterone level was 60 ng/mL,2 S; D) I, |) J N m" q
which was clearly high. Some studies suggest that
/ M8 V' c7 \3 K8 |/ |& A! rdermal conversion of testosterone to dihydrotestos-2 D6 j% T3 V" }+ p% Z& Y- [+ {8 a3 W+ \
terone, which is a more potent metabolite, is more% F2 n* _; g9 e% |1 P
active in young children exposed to testosterone
+ t' v& v- i) q* p. Gexogenously7; however, we did not measure a dihy-6 ~/ A2 d" Z0 O
drotestosterone level in our patient. In addition to* F5 E* M+ R1 e0 T& b
virilization, exposure to exogenous testosterone in2 z7 o: T5 O' U! r8 R
children results in an increase in growth velocity and# b( p' G0 p2 _
advanced bone age, as seen in our patient.
! u9 M& H3 e5 x" k* tThe long-term effect of androgen exposure during
# p2 ?$ S! ^+ Q( vearly childhood on pubertal development and final
+ |: {5 u! ]) I2 I4 F1 Sadult height are not fully known and always remain' i: V Q, j- W L! ~
a concern. Children treated with short-term testos-
9 _, h0 s$ V: d0 u* fterone injection or topical androgen may exhibit some) \, ?; [5 y2 v5 K2 P9 s- ]
acceleration of the skeletal maturation; however, after
% E, M3 w" r; H- |3 ?" Mcessation of treatment, the rate of bone maturation
1 [4 H2 C3 f1 Z2 u; a6 k" Y3 Udecelerates and gradually returns to normal.8,9
7 y) S: B- ?, N) K2 iThere are conflicting reports and controversy' M# H. s2 J+ b. l
over the effect of early androgen exposure on adult k1 O0 ]7 a5 ^# B8 _) {! l. u/ s
penile length.10,11 Some reports suggest subnormal
4 v5 y) N; l% Q s: P6 kadult penile length, apparently because of downreg-& B1 y; H" H2 N4 B; v
ulation of androgen receptor number.10,12 However,0 ]+ N: O2 a! b3 |! L q
Sutherland et al13 did not find a correlation between, V( J; ]9 n y0 f& j* C4 ~5 }4 u
childhood testosterone exposure and reduced adult
- w) R* |% d& [$ a! x8 cpenile length in clinical studies.
1 M, g1 O7 E3 H5 uNonetheless, we do not believe our patient is$ i8 `! l/ _' K+ \5 P% `$ r; Z
going to experience any of the untoward effects from- | P) N( V7 X+ E
testosterone exposure as mentioned earlier because
2 |7 N A* [0 c0 b& Bthe exposure was not for a prolonged period of time.$ A" B& p7 [' U9 N
Although the bone age was advanced at the time of$ s' t# n1 ~5 A
diagnosis, the child had a normal growth velocity at9 w! a. o- L4 X% ~' l3 E& _7 [) e
the follow-up visit. It is hoped that his final adult: \% E; m% g. y9 o, _9 W @
height will not be affected.
; G2 U8 ^! x$ \; K0 m& kAlthough rarely reported, the widespread avail-
( e/ J4 c& J9 Y! {+ c. j- bability of androgen products in our society may6 S$ N+ ^7 ^: J+ p9 F; D& w5 s
indeed cause more virilization in male or female
* b5 V& b# A3 N! r* R) }6 Mchildren than one would realize. Exposure to andro-
8 T$ D8 r" N6 ?' _# p1 j) ~gen products must be considered and specific ques-
" |' ~! x( @* jtioning about the use of a testosterone product or. D; T. y9 |/ F! [& r/ [
gel should be asked of the family members during
1 f$ c7 M: V- X% _" othe evaluation of any children who present with vir-
. Q3 t, W7 G; Z _ilization or peripheral precocious puberty. The diag-" p! L! U- [& Z5 f) G# L$ I
nosis can be established by just a few tests and by+ R4 U& g3 u# S$ R4 j, G( N
appropriate history. The inability to obtain such a5 A# i' R& o# T4 D2 s% L* v) z7 \: C
history, or failure to ask the specific questions, may
9 R8 e8 \4 M0 v7 [5 dresult in extensive, unnecessary, and expensive$ y/ e& h; U( c* ~$ B
investigation. The primary care physician should be
% n# V+ u% z9 ]/ A6 x3 _! a p6 Daware of this fact, because most of these children
% H- X& f# \" x1 D5 Vmay initially present in their practice. The Physicians’$ x4 L. D& u. {# v0 A4 ~1 V
Desk Reference and package insert should also put a! ^8 {4 P" o' W$ x. o" Y* f
warning about the virilizing effect on a male or( [1 k* X" h9 [3 C/ g. W
female child who might come in contact with some-
1 E, M, Q2 W1 B% H7 r) k/ a5 l5 wone using any of these products.; ^# I. p8 p6 ]# H! ~/ @
References
( b5 _" i# a' \: r5 R1. Styne DM. The testes: disorder of sexual differentiation9 _% N6 |9 ^# r; U Z# L2 h
and puberty in the male. In: Sperling MA, ed. Pediatric
& b' _' B( H3 ~/ j& mEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
$ \5 w* I( Q! @' o, N) U- L2002: 565-628.
* X* c' p" {: \4 y8 h3 A2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious( r6 H# e! Y2 i3 F g; q/ N
puberty in children with tumours of the suprasellar pineal
6 |3 f8 X' z W- u) H2 ?at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
: }" z9 t/ f% K9 b5 m7 H$ K# ]9 ^Topical Testosterone Exposure / Bhowmick et al 543
! t i( y! V5 }8 _( ?2 j4 Xareas: organic central precocious puberty. Acta Paediatr.
5 V/ ^+ T6 T+ F8 G3 Y2001;90:751-756.
5 T$ g3 a3 o8 X( J/ Y$ s3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
% G+ ?2 Y& d; I, z. mPediatric Endocrinology. 4th ed. New York, NY: Marcel" U0 D. f* o" r7 ^- l6 G! S
Dekker Inc; 2003:211-238.
& M- T) L( _, t5 }! q& ^' A1 }4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
7 H$ t, c. w# n1 [" Jdevelopment in a two-year-old boy induced by topical
& U, w, H+ ]9 m" E( L& Z* jexposure to testosterone. Pediatrics. 1999;104:e23.
1 |3 k' x- o; T5 U5 E5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
0 `1 Q6 `, K- @3 S4 Z; ]Skeletal Development of the Hand and Wrist. 2nd ed.$ ^" H# j" }+ O( O* }
Stanford, CA: Stanford University Press; 1959.
# N2 R3 i; s$ @" c9 i6. Physicians’ Desk Reference. Androgel 1% testosterone,1 Y* H c3 y. k; W$ [
Unimed Pharmaceutical Inc. Montvale, NJ: Medical: `$ i U. u+ x P* T. n9 z* m
Economics Company, Inc; 2004:3239-3241.7 Y$ i0 g) y3 ^
7. Klugo RC, Cerny JC. Response of micropenis to topical8 Y& M- D) O( L/ I& w
testosterone and gonadotropin. J Urol. 1978;119:
u! c, g, l" i Y- B% i667-668.
0 P% b0 Z/ J- A5 M" E8. Guthrie RD, Smith DW, Graham CB. Testosterone
- Q' K1 K# B& s1 m4 r( B: ztreatment for micropenis during early childhood. J Pediatr.
. c7 f4 ~; U5 k' s! v K. I, r6 w1973;83:247-252. i3 x# t9 U: V6 P' j! E
9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone0 h+ _ w* |* h; j0 K" D
therapy for penile growth. Urol. 1975;6:708-710.
' V5 R7 h: b1 j) N: z/ d/ _! q& _* `10. Husmann DA, Cain MP. Microphallus: eventual phallic6 p$ w" r) J3 m6 k
size is dependent on the timing of androgen administra-5 R4 M# k* C8 x& s, E* m$ l
tion. J Urol. 1994;152:734-739.
6 a7 e2 Q4 V& r# S" d6 T: R* w6 n# o11. McMahon DR, Kramer SA, Husmann DA. Micropenis:% g: j: _1 s5 Z2 o, P
does early treatment with testosterone do more harm0 {; T& L7 J w* b/ @
than good? J Urol. 1995;154:825-829.
0 u. i0 j4 N$ x/ H7 v12. Takane KK, George FW, Wilson JD. Androgen receptor
4 R& Z# C. \ H' Z( Cof rat penis is down-regulated by androgen. Am J Physiol.
4 G: {- [& |4 R4 f0 q. J, t% } G4 d1990;258:E46-E50.. w+ T7 q4 v B D7 a+ a
13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect
4 P( D- O( B: q" ~- R+ d3 ^of prepubertal androgen exposure on adult penile
! Y9 n5 r' x# `length. J Urol. 1996;156:783-787. |
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