Testicular Growth Arrest and Adolescent Varicocele: Does Varicocele Size Make a Difference?:

Testicular catch-up growth in the non-operative management of the adolescent varicocele

INTRODUCTION

Adolescent varicocele is a common urologic condition with a spectrum of outcomes, leading to variations in management. Testicular hypotrophy is a common indication for surgery Routine monitoring may be an appropriate form of management for many adolescents with testicular hypotrophy, as studies have shown that a large proportion of these patients may experience catch-up growth of the ipsilateral testis. Furthermore, there are few longitudinal studies which have correlated patient specific factors to catch-up growth. We aimed to determine the frequency of testicular catch up-growth in adolescents with varicocele while also examining if patient specific factors such as BMI, BMI percentile, or height correlated with testicular catch-up growth.

METHODS

A retrospective chart review found adolescent patients who presented to our institution with varicocele from 1997 to 2019. Patients between the ages of 9 and 20 years with left-sided varicocele, a clinically significant testicular size discrepancy, and at least two scrotal ultrasounds at least one year apart were included in analysis. Testicular size discrepancy of greater than 15% on scrotal ultrasound was considered clinically significant. Testicular size was estimated in volume (mL) via the Lambert formula. Statistical relationships between testicular volume differential and height, body mass index (BMI), and age were described with Spearman correlation coefficients (ρ).

RESULTS

40 patients had a testicular volume differential of greater than 15% at some point during their clinical course and were managed non-operatively with observation and serial testicular ultrasounds. On follow-up ultrasound, 32/40 (80%) had a testicular volume differential of less than 15%, with a mean age of catch up growth at 15 years (SD 1.6, range 11-18 years). There were no significant correlations between baseline testicular volume differential and baseline BMI (ρ = 0.00, 95% CI [-0.32, 0.32]), baseline BMI percentile (ρ = 0.03, 95% CI [-0.30, 0.34]), or change in height over time (ρ = 0.05, 95% CI [-0.36, 0.44]).

DISCUSSION

The majority of adolescents with varicocele and testicular hypotrophy exhibited catch-up growth with observation, suggesting that surveillance is an appropriate form of management in many adolescents. These findings are consistent with previous studies and further indicate the importance of observation for the adolescent varicocele. Further research is warranted to determine patient specific factors that correlate with testicular volume differential and catch up growth in the adolescent varicocele.

The dilemma of adolescent varicocele

Adolescent varicocele is associated with ipsilateral testicular hypotrophy and the concern for future infertility. A testicular size discrepancy greater than 15-20 % between left and right testicle is an indication for treatment to allow catch-up growth in the hope of preventing a future decline in fertility. Some authors advocate for a period of watchful waiting, as normal testicular growth may occur asymmetrically. We review the current literature to highlight some controversies and challenges in management.

Conservative management of adolescent varicoceles: a retrospective review

OBJECTIVES

To determine whether adolescents with varicoceles experience physiologic testicular "catch-up" growth during development, thereby providing a role for conservative management of adolescent varicoceles.

METHODS

An internal review board-approved retrospective chart review of the Children's Hospital of Eastern Ontario patient database was conducted. Patients presenting with a varicocele between January 1999 and January 2005 were selected. Varicocele grade, ultrasound-determined testicular volume differential over time, and need for surgery were recorded. The difference between left and right testicular volume at diagnosis and at study completion was compared and statistically analyzed.

RESULTS

A total of 33 boys with a median age of 13.4 years (range, 8.8 to 16.1 years) was selected. Patients presented with clinical varicocele grades 3 (63.6%), 2 (33.3%), and 1 (3.0%). Of 33 patients, 3 (9.1%) required surgery for pain (1) and increasing testicular size discrepancy (2). A significant decrease was observed in the percentage difference between left and right testicular volumes over time (P = 0.017). This remained significant even after adjustment for age, length of observation, and need for surgery (P = 0.026). Of 14 patients with an initially significant difference in testicular volume (greater than 20%) who were managed conservatively, 7 experienced testicular catch-up growth (volume differential less than 20%) (P = 0.016).

CONCLUSIONS

Some adolescent boys with a varicocele and considerable testicular size discrepancy manifest significant testicular "catch-up" growth during continued physiologic development. However, those patients who show a testicular size discrepancy that is steadily increasing should be considered for surgical intervention.