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Orchiditis: A Comprehensive Medical Guide

Overview

Orchiditis (also spelled orchiditis) is the medical term for inflammation of the testicles (the testes). The condition can affect one or both testes and may involve surrounding structures such as the epididymis (epididymo‑orchitis) or the spermatic cord. While it can occur at any age, orchiditis is most common in males between the ages of 15 and 35, coinciding with peak sexual activity and the highest incidence of sexually transmitted infections (STIs).

Globally, testicular inflammation accounts for roughly 1–2 % of all male urologic visits each year, and epididymo‑orchitis (the combined form) is responsible for about 600,000 cases annually in the United States according to CDC data (2022). Most cases are treatable, but delayed diagnosis can lead to infertility or permanent testicular damage.

Symptoms

The presentation of orchiditis can be acute (sudden onset) or sub‑acute (developing over days). Common symptoms include:

• Pain or tenderness in one or both testicles – often described as a dull ache that can become sharp.
• Swelling or enlargement of the affected testis.
• Redness and warmth of the scrotal skin.
• Scrotal heaviness or a feeling of “dragging.”
• Fever (often >38 °C/100.4 °F) and chills in infectious cases.
• Localized abdominal or groin pain, sometimes radiating to the lower back.
• Urinary symptoms such as burning, frequency, or urgency if a urinary tract infection (UTI) is present.
• Nausea or vomiting in severe systemic illness.
• Discharge from the urethra (purulent or clear) when the cause is sexually transmitted.
• Reduced libido or erectile dysfunction (usually temporary).
• Infertility signs – such as decreased semen volume – in chronic or recurrent cases.

In infants and very young children, orchiditis may present only as a painless scrotal swelling or an undescended testis that becomes tender.

Causes and Risk Factors

Orchiditis is usually a secondary inflammation caused by infection, trauma, or systemic disease.

Infectious Causes

• Sexually transmitted bacteria – Neisseria gonorrhoeae and Chlamydia trachomatis are the leading pathogens in sexually active men under 35.
• Urinary tract pathogens – Escherichia coli, Klebsiella, and Proteus species can ascend from the urethra, especially after instrumentation (catheterization) or prostatitis.
• Viral infections – Mumps virus is a classic cause of orchitis in post‑pubertal males; other viruses (e.g., Coxsackie, Epstein‑Barr) have been reported.
• Fungal or parasitic infections – Rare, but reported in immunocompromised patients (e.g., Candida, Schistosoma haematobium).

Non‑infectious Causes

• Trauma – Direct blow to the scrotum can cause hemorrhage and secondary inflammation.
• Autoimmune reactions – Testicular torsion followed by reperfusion injury may trigger an inflammatory response.
• Systemic inflammatory diseases – Sarcoidosis and systemic lupus erythematosus (SLE) can involve the testes.
• Post‑operative inflammation – After hernia repair or vasectomy.

Risk Factors

• Age 15–35 (higher STI exposure)
• Unprotected sexual activity
• Recent urinary catheterization or urologic procedures
• History of prior epididymitis or orchitis
• Immune suppression (HIV, chemotherapy, steroids)
• Recent mumps infection (especially in unvaccinated individuals)

Diagnosis

Accurate diagnosis relies on a combination of history, physical examination, and targeted investigations.

Clinical Evaluation

• History – onset, severity, sexual activity, recent urinary symptoms, trauma, travel, vaccination status.
• Physical exam – inspection for swelling, erythema; palpation for tenderness, induration, or a palpable mass; transillumination to differentiate hydrocele from solid enlargement.

Laboratory Tests

• Urinalysis and urine culture – to identify bacterial pathogens.
• Urethral swab or first‑catch urine PCR – for Chlamydia and Gonorrhoeae.
• Blood tests – CBC (leukocytosis), ESR/CRP (inflammation), serum gonococcal and chlamydial antibodies if needed.
• Serology for mumps IgM/IgG – when viral orchitis is suspected.

Imaging

• Scrotal ultrasonography – First‑line imaging; shows increased blood flow (hyperemia) in acute inflammation, abscess formation, or testicular torsion.
• Doppler ultrasound – Differentiates orchiditis from torsion (torsion shows absent or decreased flow).
• CT or MRI – Reserved for complex cases with suspected intra‑abdominal source or when ultrasound is equivocal.

When to Consider Biopsy

Biopsy is rarely required but may be performed if a mass is suspicious for malignancy, especially in older men where testicular cancer must be excluded.

Treatment Options

Management is individualized based on the underlying cause, severity, and patient factors.

Antibiotic Therapy (Infectious Orchiditis)

• Empiric regimen (first 48 h) – A third‑generation cephalosporin (e.g., ceftriaxone 250 mg IM) plus a doxycycline 100 mg PO BID for 10–14 days covers gonorrhea and chlamydia.
• Urinary pathogen coverage – If E. coli is suspected, trimethoprim‑sulfamethoxazole (TMP‑SMX) 160/800 mg PO BID for 10 days or a fluoroquinolone (ciprofloxacin 500 mg PO BID) may be used.
• Adjust antibiotics according to culture results and local resistance patterns (CDC 2023).

Antiviral Therapy (Viral Orchitis)

• Supportive care is primary; no specific antivirals for mumps.
• Analgesics, antipyretics, and scrotal elevation are recommended.

Pain and Inflammation Control

• Acetaminophen or ibuprofen (400–600 mg PO q6‑8 h) for pain and fever.
• Severe pain may warrant short‑term opioids (e.g., tramadol) under physician supervision.
• Scrotal support (tight underwear or a jockstrap) and regular cold packs for 15‑20 min every 2 h during the first 24 h.

Surgical Intervention

• Abscess drainage – Needle aspiration or incision & drainage if a localized collection develops.
• Orchiectomy – Rare, reserved for necrotic testis, refractory infection, or when malignancy cannot be excluded.
• Torsion exclusion – Prompt surgical exploration if torsion cannot be ruled out.

Lifestyle and Supportive Measures

• Hydration and rest.
• Avoidance of heavy lifting, cycling, or prolonged sitting for 2‑3 weeks.
• Complete the HPV and MMR vaccination series to reduce viral causes.
• Safe sex practices – condoms, regular STI screening.

Living with Orchiditis

Even after acute symptoms resolve, many men experience lingering concerns about fertility and sexual function. Below are practical tips for day‑to‑day management.

Follow‑up Care

• Repeat scrotal ultrasound 2–4 weeks after treatment to confirm resolution.
• Semen analysis is advisable after 3 months if fertility is a concern.
• Maintain regular urologic check‑ups, especially after recurrent episodes.

Self‑Care Strategies

• Scrotal support – A snug athletic supporter can reduce discomfort during activity.
• Cold therapy – Apply a thin towel-wrapped ice pack for 15 min, 3–4 times daily during the first 48 h.
• Pain diary – Track pain intensity and triggers; share with your provider.
• Psychological support – Discuss anxieties about sexual health with a counselor or support group.

Fertility Considerations

• Most acute infections do not cause permanent infertility; however, recurrent or severe cases can impair spermatogenesis.
• Consider sperm banking before treatment if you anticipate multiple or severe episodes.
• Antioxidant supplements (zinc, vitamin C, CoQ10) may aid recovery, but discuss with your physician.

Prevention

Many cases of orchiditis are preventable with simple measures.

• Vaccination – Ensure up‑to‑date MMR (for mumps) and HPV vaccines.
• Safe sexual practices – Use condoms consistently; get screened for STIs at least annually if sexually active.
• Prompt treatment of urinary infections – Complete prescribed antibiotics and follow up cultures.
• Protective gear – Wear an athletic cup during high‑impact sports.
• Good hygiene – Daily gentle cleansing of the genital area; avoid tight, non‑breathable underwear.
• Post‑operative care – Adhere to wound‑care instructions after urologic surgeries to reduce infection risk.

Complications

If left untreated or inadequately managed, orchiditis can lead to serious sequelae.

• Testicular abscess – May require surgical drainage.
• Testicular infarction/necrosis – Rare but can result in permanent loss of the organ.
• Infertility – Due to damage of seminiferous tubules or scarring.
• Epididymal obstruction – Leading to chronic pain and obstructive azoospermia.
• Chronic scrotal pain syndrome – Persistent discomfort lasting >3 months.
• Secondary bacterial spread – Rarely, infection can disseminate, causing sepsis.

When to Seek Emergency Care

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