CT Abdomen & Pelvis with Contrast - Report Analysis

FINDINGS SUMMARY

1. Left Renal Mass - MOST URGENT FINDING

• Partial exophytic component
• Isodense on plain CT
• Heterogeneous post-contrast enhancement
• Few small central necrotic areas
• No internal fat or calcification
• No renal sinus infiltration
• No renal vein or IVC thrombosis
• No lymphadenopathy or metastatic disease

Clinical Significance:

• Solid mass with heterogeneous enhancement on contrast CT - the hallmark of RCC
• Size (~4.5 cm) places this as cT1b stage (>4 cm but <7 cm, limited to kidney) per 2017 AJCC/TNM staging
• No venous involvement, no lymphadenopathy - favors localized disease

Staging (TNM 2017):

• T1b - tumor >4 cm but ≤7 cm, limited to kidney
• N0 - no lymphadenopathy detected
• M0 - no metastatic disease in abdomen/pelvis
• Provisional Stage: cT1b N0 M0 - Stage I localised RCC (chest CT/bone scan needed to complete staging)

What Happens Next:

• For masses >4 cm (cT1b and above), surgical resection is the standard of care
• Preferred approach: minimally invasive partial or radical nephrectomy (laparoscopic or robotic), with the goal of negative margins and renal parenchyma preservation
• A chest CT should be done to complete staging and exclude pulmonary metastases
• Serum labs: LFTs, creatinine/eGFR (especially important as contralateral kidney must compensate), CBC
• Biopsy: Surgico-pathological correlation is recommended - the radiologist has explicitly asked for this

2. Liver Abscess - URGENT

• Diffuse fatty liver (hepatomegaly 21.0 cm)
• Reactive bilateral basal pleural effusions (secondary to the large abscess)
• Caecal wall thickening suggesting amoebic typhlitis (colonic involvement)
• Minimal free pelvic fluid

Treatment of Amoebic Liver Abscess:

• First-line medical treatment: Metronidazole or Tinidazole (highly effective; should be the first choice)
• After completing metronidazole/tinidazole, add diloxanide furoate for 10 days to clear intestinal amoebae
• Aspiration/drainage is indicated when:
  • Imminent rupture is feared (especially left lobe)
  • No response to IV metronidazole within 48-72 hours
  • Evidence of secondary bacterial superinfection

3. Benign Hepatic Cyst

4. Mild Prostatomegaly

5. Bilateral Mild-to-Moderate Hydrocele

6. Other Normal/Stable Findings

PRIORITY ACTION PLAN

Important Disclaimer

Treatment Plan for Prakash S. Solanki (66M)

CONDITION 1: Left Renal Mass (Likely RCC, cT1b) - TOP PRIORITY

Step 1: Complete Staging Before Surgery

• Chest CT - to rule out pulmonary metastases (must be done before any surgery)
• Serum labs: CBC, creatinine, eGFR, LFTs, LDH, calcium, urinalysis
• No bone scan needed unless bone pain or raised alkaline phosphatase

Step 2: Surgical Treatment (Standard of Care)

• Adrenal gland can be spared unless directly involved (CT shows no adrenal involvement here)
• Lymphadenectomy: routine lymph node dissection in clinically node-negative RCC has not shown survival benefit (EORTC 30881 trial) - but nodal sampling may still be done

Step 3: Post-Surgery

• Pathology will confirm histological subtype (clear cell, papillary, chromophobe, etc.) and grade
• Adjuvant therapy (immunotherapy/targeted therapy) may be considered based on final pathological stage and risk stratification
• RCC is largely resistant to chemotherapy and radiation - surgery is the primary curative modality
• Regular surveillance with CT scans every 6-12 months post-operatively

Note: Surgery for RCC cannot happen until the liver abscess is treated first - sepsis from an active abscess would make major surgery extremely high-risk. Both conditions must be managed in the correct sequence.

CONDITION 2: Large Amoebic Liver Abscess (9.2 x 9.0 cm) - TREAT FIRST

Medical Treatment (First-Line)

Drainage - Strongly Recommended Here

• Ultrasound-guided needle aspiration OR pigtail catheter insertion - indicated when:
  • Abscess >5 cm (this one is >9 cm)
  • No response to IV metronidazole within 48-72 hours
  • Risk of rupture (large size, left lobe location - segment IV is near left lobe)
  • Secondary bacterial superinfection suspected
• Aspiration also provides fluid for microbiological culture to exclude bacterial co-infection

The threshold for drainage of a left lobe (segment IV) abscess should be low, as it can rupture into the pericardial cavity - Bailey & Love's Surgery, 28th Ed

Associated Bilateral Pleural Effusions

• These are reactive (sympathetic) effusions secondary to the liver abscess
• Will resolve once the abscess is treated - no separate intervention needed unless breathing is compromised

Monitoring

• Repeat USS or CT at 2-4 weeks to assess abscess regression
• Serology for Entamoeba histolytica (ELISA) if not already done - highly sensitive

CONDITION 3: Amoebic Typhlitis (Caecal Involvement)

• Same metronidazole/tinidazole regimen as above covers this
• After resolution, colonoscopy to confirm healing and exclude co-existing colonic carcinoma (caecal cancer can coexist with/mimic amoebic colitis)
• Diloxanide furoate is especially important here to clear the luminal/intestinal amoebae

CONDITION 4: Fatty Liver with Hepatomegaly

• Lifestyle: Weight loss, low-fat diet, regular exercise
• Avoid hepatotoxic drugs and alcohol entirely
• Treat any underlying metabolic syndrome (diabetes, dyslipidemia, obesity) - check fasting blood sugar, HbA1c, lipid profile
• No specific pharmacotherapy has strong evidence; focus is on metabolic risk factor control
• Liver function tests (LFTs) should be monitored

CONDITION 5: Mild Prostatomegaly

• Serum PSA must be checked first (as radiologist recommended)
• If PSA is elevated: urology referral, possible TRUS biopsy
• If PSA normal and symptoms of BPH (frequency, hesitancy, nocturia): Alpha-blockers (tamsulosin 0.4 mg OD) or 5-alpha reductase inhibitors (finasteride, dutasteride) can be used
• Digital rectal examination (DRE) to assess prostate

CONDITION 6: Bilateral Hydrocele

• Bilateral mild-to-moderate hydrocele - likely reactive or idiopathic at this age
• Usually no treatment needed unless symptomatic or large
• If bothersome: surgical hydrocelectomy or aspiration + sclerotherapy
• Rule out secondary cause (infection, trauma, testicular tumour) with scrotal ultrasound

RECOMMENDED TREATMENT SEQUENCE

STEP 1 (NOW - Immediately):
→ Admit to hospital
→ Start IV Metronidazole for liver abscess
→ Arrange USS-guided drainage of abscess
→ Blood cultures, LFTs, creatinine, CBC, PSA, serology

STEP 2 (Days 3-10):
→ Continue anti-amoebic treatment
→ Add Diloxanide Furoate when oral medications tolerated
→ Monitor abscess with repeat imaging
→ Complete RCC staging: Chest CT

STEP 3 (Once abscess resolved, ~2-4 weeks):
→ Urological consultation and planning for partial/radical nephrectomy
→ Minimally invasive surgery for left renal mass

STEP 4 (Post-operatively):
→ Histopathological confirmation of RCC
→ Surveillance imaging
→ Lifestyle modification for fatty liver
→ BPH management based on PSA result

Disclaimer: This is educational medical information. All treatment decisions must be made by the treating physician and relevant specialists (Urologist, Hepatologist/Gastroenterologist, Infectious Disease specialist). Drug doses must be confirmed for this patient's specific renal and hepatic function before prescription.