A nurse is teaching adolescent boys about pubertal changes. The first sign of pubertal change seen with boys is

The statement that best describes Tanner staging is option B. Tanner staging is a system used
to classify and assess the progression of puberty based on the development of both primary
and secondary sexual characteristics. It provides a framework for evaluating the physical
changes that occur during puberty, such as breast development in females, testicular
enlargement in males, pubic hair growth, and other secondary sexual characteristics. The
Tanner staging system includes several stages that represent the sequential progression of
puberty in individuals.
staging of puberty based on the initiation of primary sexual characteristics in (option A) is not
correct because it, does not encompass the full scope of Tanner staging, as it does not
consider the progression of secondary sexual characteristics.
staging of puberty based on the initiation of menarche (the onset of menstruation) and
nocturnal emissions, in (option C) is not correct. While menarche and nocturnal emissions are
significant events that occur during puberty, they do not encompass the entire Tanner staging
system, which involves a broader range of physical changes.
predictable stages of puberty based on chronologic age, in (option D) is not correct. Tanner
staging is based on the progression of physical changes and sexual maturation, rather than
being solely determined by chronological age. Puberty can vary in onset and duration among
individuals, making chronological age an unreliable indicator of pubertal development.

Legg-Calve-Perthes disease, also known as Perthes disease, is a childhood condition that affects the hip joint. It occurs due to a disruption in the blood supply to the femoral head (epiphysis), which can lead to bone death (avascular necrosis) and subsequent deformity of the femoral head.

It is essential for parents to understand that Legg-Calve-Perthes disease is not an acute illness that lasts for a short duration (Option A). It is a chronic condition that typically progresses over a period of months or years.

stating that it is caused by a virus, in (option C) is incorrect. The exact cause of Legg-Calve- Perthes disease is not fully understood, but it is not caused by a viral infection. It is believed to be related to multifactorial factors, including genetic and vascular factors.

stating that it primarily affects adults, in (option D) is incorrect. Legg-Calve-Perthes disease predominantly affects children, typically between the ages of 4 and 8 years old, during the period of rapid growth.