Prevalence and Incidence of Gynecomastia

Prevalance of Gynecomastia:

15 million - 15% of adult men to some extent (unreliable estimate) ... see also overview of Gynecomastia.

Prevalance Rate:

approx 1 in 18 or 5.51% or 15 million people in USA [Source statistic for calcuation: "15 million - 15% of adult men to some extent (unreliable estimate)" -- see also general information about data sources]

Gynecomastia Prevalence: Book Excerpts

• Causes and incidence - Mastitis and breast engorgement
• Gynecomastia - epidemiology - Gynecomastia

Prevalence/Incidence of Gynecomastia: Online Medical Books

16 MEDICAL BOOKS ONLINE! Review excerpts from medical books online, free, without registration, for more information about the prevalence and/or incidence of Gynecomastia.

Mastitis and breast engorgement: Causes and incidence
(Professional Guide to Diseases (Eighth Edition))

Mastitis develops when a pathogen that typically originates in the nursing infant’s nose or pharynx invades breast tissue through a fissured or cracked nipple and disrupts normal lactation. The most common pathogen of this type is Staphylococcus aureus; less frequently, it’s S. epidermidis or beta-hemolytic streptococci. Rarely, mastitis may result from disseminated tuberculosis or the mumps virus. Predisposing factors include a fissure or abrasion on the nipple; blocked milk ducts; and an incomplete let-down reflex, usually due to emotional trauma. Blocked milk ducts can result from a tight bra or prolonged intervals between breast-feedings. Causes of breast engorgement include venous and lymphatic stasis, and alveolar milk accumulation. (See Physiology of lactation, page 982.)

Mastitis occurs postpartum in about 1% of pregnant women, mainly in primiparas who are breast-feeding. It occurs occasionally in nonlactating females and rarely in males. All breast-feeding mothers develop some degree of engorgement, which isn’t an infectious process.

» READ BOOK EXCERPT ONLINE »

Source: Professional Guide to Diseases (Eighth Edition), 2005

Gynecomastia: Gynecomastia - epidemiology
(The 5-Minute Pediatric Consult)

2 peaks in age distribution occur in the pediatric population:

• Neonatal period
• Puberty

Gynecomastia - incidence

Peak incidence for pubertal gynecomastia in males is at 14 years (range, 10–16 years).

Gynecomastia - prevalence

• Neonatal gynecomastia occurs in 60–90% of all newborns.
• ~40% of boys develop transient gynecomastia (measuring ≥0.5 cm) during puberty.

» READ BOOK EXCERPT ONLINE »

Source: The 5-Minute Pediatric Consult, 2008

About prevalence and incidence statistics:

The term 'prevalence' of Gynecomastia usually refers to the estimated population of people who are managing Gynecomastia at any given time. The term 'incidence' of Gynecomastia refers to the annual diagnosis rate, or the number of new cases of Gynecomastia diagnosed each year. Hence, these two statistics types can differ: a short-lived disease like flu can have high annual incidence but low prevalence, but a life-long disease like diabetes has a low annual incidence but high prevalence. For more information see about prevalence and incidence statistics.

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