Epiphysiolysis in a 22-year-old Patient with Congenital Hypogonadotropic Hypogonadism: Case Report^*

Abstract

Epiphysiolysis is a relatively common disease in the adolescent population (9–16 years); however, it is rare in the adult population. It is characterized by non-traumatic proximal femur slipping. When it occurs in this population it is associated with some disease that slows sexual development and physis closure, such as endocrine diseases or brain tumors. The aim of the present study is to report a case of epiphysiolysis in a 22-year-old patient with hypogonadotropic hypogonadism. There are only 63 cases reported in the world literature on epiphysiolysis in the adult population.

Keywords
epiphyses, slipped; Kallmann syndrome; femur head

Resumo

A epifisiólise é uma doença relativamente comum na população adolescente (de 9–16 anos), entretanto rara na população adulta. Se caracteriza pelo escorregamento metáfiso-epifisário do fêmur proximal não-traumático. Quando ocorre nessa população, está associada a alguma doença que retarda o desenvolvimento sexual e fechamento fisário, como doenças endocrinológicas ou tumores cerebrais. O objetivo do presente estudo é relatar um caso de epifisiólise numa paciente com 22 anos de idade e hipogonadismo hipogonadotrófico. Existem apenas 63 casos relatados na literatura mundial sobre epifisiólise na população adulta.

Palavras-chave
epífise deslocada; síndrome de Kallmann; cabeça do fêmur

Introduction

Epiphysiolysis is one of the main diseases that affect the adolescent’s hip and is characterized by femoral metaphy-sary slipping, non-traumatic, anterolaterally in relation to the epiphysis, which remainscenteredontheacetabulum.¹ It mainly affects the age group between 9 and 16 years (mean of 12).¹,²,³,⁴ It occurs when a fragile physis (histological, vascular, and endocrine factors) is submitted to mechanical overload.⁴,⁵

It has a very varied incidence in the literature, from 0.03/10,000 to 5/10,000 depending on the work, gender, region, and ethnicity.¹,²,³,⁴,⁶,⁷ Epiphysiolysis has a higher incidence in males (2:1.4) compared to female patients, and it is more incident in African American and Hispanics.⁴,⁷

Simultaneous bilateral occurrence is 7%⁷ and can reach 21% asynchronously. Approximately 90% of contralateral slips occur within 18 months,⁴ and they are more incident when associated with endocrine diseases. In these cases, contralateral fixation is indicated, even when the patient is asymptomatic.²,⁴,⁵

Clinically, the patient presents with complaint of hip or knee pain and difficulty walking, commonly insidious and rarely acute. Often, the diagnosis is late or neglected by the confounding and uncharacteristic clinical picture, causing a late treatment and worse prognosis.⁴,⁸ On physical examination, there is limitation of flexion and internal rotation, and Drehmann sign (abduction and external rotation during passive flexion)⁴ is characteristic.

On radiography (front and Lauenstein), slipping is observed in the more advanced cases, and, in the initial cases, there are indicative signs such as enlargement and physis irregularity. Two radiographic methods are described for the diagnosis and measurement of slipping: The Trethowan sign —when the line on the upper surface of the femoral neck (Klein line) does not intersect with the physis (►Fig. 1), and measurement of the Southwick angle (between head and diaphysis in the profile) (►Fig. 2).⁴,⁸ Magnetic resonance imaging is recommended for initial cases or diagnostic doubt.

Fig. 1
Frontal radiography demonstrating slipping of side E and Trethowan sign.

Fig. 2
Pelvic radiography—Lauenstein incidence with measurement of the Southwick angle on the affected side.

Epiphysiolysis can be classified in 3 ways: in terms of duration, it can be acute<3 weeks or chronic >3 weeks; symptom-based (Loder classification): stable—patient can walk, or unstable—patient cannot walk even with the aid of crutches,²,⁴ and the radiographic classification is done by degree of slippage.²,⁴

Of multifactorial etiology, numerous diseases or characteristics are associated with this condition: obesity, renal osteoarthritis, hypothyroidism, hypogonadism, hyperpara-thyroidism,²,³,⁴ increase in femoral retroversion,¹,⁴ acetabu-lar retroversion,⁴ increase in fissary obliqueness,⁴ and socioeconomic deprivation.⁹

The recommended treatment is in situ fixation, causing epiphysis. When slipping reduction occurs, there is an increased occurrence of avascular necrosis of the femoral head (ANFH) and condrolysis,⁴,⁶ with these being the most common complications of the disease. After in situ fixation, the rateof ANFH reported intheliteratureis 1.5%.⁴,⁶ A total of 10% of the patients will present with severe osteoarthrosis after 20 years of age.⁴,⁶

The occurrence is rare in adults, with onlya few reports in the literature. When it happens, there is always an association with some disease that delays sexual maturation and, consequently, fissure closure.¹⁰ The most commonly described diseases associated with epiphysiolysis in adults are hypopituitarism, hypothyroidism, and hypogonadism.¹⁰

The aim of the present study is to report a case of epiphysiolysis in a 22-year-old patient with sexual developmental delay and with a diagnosis of congenital hypogona-dotropic hypogonadism. Epiphysiolysis is a rare disease characterized by the absence of pubertal development, due to problems in the production or secretion of gonadotrophy-releasing hormone (GnRH). Lab tests show low concentrations of sex steroids (testosterone/estradiol) and reduced or normal values of pituitary gonadotropins (LH and FSH). The other hypothalamic hormones and hypothalamic-pituitary magnetic resonance imaging are normal. When associated with anosmia, it is called Kallmann syndrome.

Case Report

A 22-year-old female patient sought orthopedic care complaining of insidious hip pain for 3 months, denying trauma. She reported having looked for care twice before, when she was treated with medication, without tests. She denied pain in the other hip.

As personal history, she reported that she did not have menarche and that she was undergoing outpatient follow-up with a gynecologist because she presented “infant uterus”. The patient also presented undeveloped sexual secondary characters.

She presented the left lower limb rotated externally and pain in passive mobilization of the hip with positive Dreh-mann maneuver.

Pelvic radiography (►Figs. 1 and 2) showed the proximal femoral physis still open and slipping of the left side.

Surgical treatment with percutaneous fixation with can-ulate screw (►Fig. 3) was chosen. With the risk of contralateral occurrence, fixation was suggested; however, the patient refused it.

Fig. 3
Postoperative radiography – frontal incidence, fixation with canulate screw.

During follow-up, the patient presented previous test results, with a diagnosis of congenital hypogonadotropic hypogonadism. The pelvic ultrasound showed a uterus with very small dimensions 2.3 x 0.9 x 1.5 cm (volume of 2 cm²)— infant dimensions. The laboratory tests showed prolactin, TSH, free T4 and GH—within normal values. Total testosterone below 10ng/dL, LH < 0.07 mUI/mL, FSH < 0.30mUI/mL and estradiol < 11.80 pg/mL—all values well below normal.

After 3 months, she presented physeal closure of the operated side and up to 6 months of follow-up, there were no complaints of pain in the contralateral side.

Discussion

Epiphysiolysis is extremely rare in adults, and, when it occurs, it is associated with some disease that slows sexual development and physeal closure.

Because it is a rare diagnosis, and exclusion is often neglected, itstreatmentisdelayed, causing the real prevalence in the adult population to be unknown/underestimated. It is believed that many cases of hip osteoarthrosis in young patients are sequelae of undiagnosed cases.⁵

A review of the literature was performed with the terms: epiphysiolysis, slipped femoral capital epiphysis, delayed femoral capital epiphysis, slipped femoral capital epiphysis in adults. In the world literature, there are 63 case reports in the adult population, and none in the Brazilian literature.

The diseases most commonly associated with the occur-rence of epiphysiolysis inthe adult population describedinthe case reports are: hypothesia/craniopharyngioma diseases, hypothyroidism, hypogonadism, meeting other previous reviews.

Two previous reviews of the literature were performed. Macía-Villa et al.⁵ reported a case in a 47-year-old woman with chronic corticosteroid use and conducted a literature review finding 60 cases; 17 with hypoesthetic disorders, 7 with unspecified endocrine causes, 5 with hypothyroidism, and 4 cases of hypogonadism.

Speirs et al.¹⁰ also surveyed the literature and found associations similar to those of the previous review.

This case report presents a rare disease in the adult population associated with congenital hypogonadotropic hypogonadism.

The possibility of this diagnosis must be considered in adults with hip pain, mainly chronic, with a history of endocrine diseases or alteration of secondary sexual characteristics.

• *
  Study developed at the Sports Traumatology Center - Universidade Federal de São Paulo, Escola Paulista de Medicina, São Paulo, SP, Brazil.

• Financial Support
  This research did not receive any specific grant from funding agencies in the public, commercial, or not-forprofit sectors.

References

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Publication Dates

• Publication in this collection
  05 Feb 2024
• Date of issue
  2023

History

• Received
  30 Aug 2020
• Accepted
  01 Dec 2020
• Published
  19 Apr 2021