Case Based Journal Review - CPAM in 2022
With Dr. Jose Campos · hosted by Dr. Rod Gerardo & Dr. Ellen Ancisco · StayCurrentMD
Cued at 6:53 · stops at 7:38 · press play
Educational content from recorded physician discussions — not medical advice. Talk to your (or your child's) care team about your situation.
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What the experts said
Most children with prenatally diagnosed CPAM are born asymptomatic
Respiratory compromise at birth in CPAM is very unusual; the speaker has not seen it in 20 years
The 2017 study is the only completely prospective study on CPAM natural history and the only one dealing with long-term follow-up
For prenatally diagnosed asymptomatic CPAM, Dr. Campos would find it very difficult to recommend operation; for postnatally diagnosed lesions, very difficult not to operate
Prenatal CPAM (0% malignancy) and postnatal CPAM (10% malignancy) represent two different populations or diseases
Common practice in Chile is to resect prenatally diagnosed CPAMs, but after reviewing the literature, the academic discussion at Dr. Campos's hospital now leans toward not operating
The number of patients who will have an infection is so low that the benefit of lesser conversion rate does not justify preemptive surgery in all cases
If you only operate on lesions that get infected, you will miss those that develop pleuropulmonary blastoma without a pre-existing infection
Screening everyone and removing every lung lesion results in many unnecessary lobectomies in a group with very low rate of problems
The 1-3 month group had a 40% thoracotomy rate, suggesting the outcome depends on surgeon expertise in performing safe thoracoscopy
Even if complication rates are the same, surgeons generally prefer to do cases that are easier and less stressful
Elective preventive resection should be easy and have nearly zero complications; prophylactic operations should be close to zero complications
A 2017 prospective study in Archives of Disease in Childhood followed 119 prenatally diagnosed congenital cystic lung lesions for a median of 10 years
57% (68 patients) of the 119 cases were managed conservatively, and none of those who could be followed up became symptomatic
Retrospective studies show a huge range of 3-85% for risk of becoming symptomatic, but systematic reviews narrow this to 3.2% in one review and 25% in another
A 2021 Pediatrics study by the Midwest Pediatric Surgery Consortium retrospectively examined histology of 521 lung lesions resected across 11 children's hospitals
Out of 344 prenatally diagnosed lesions, none had malignant pathology when resected
Of 177 children with postnatal diagnosis of CPAM, 15 (8.7%) were classified as having a malignant tumor
The risk of malignancy approached 10% for lung masses diagnosed postnatally
The International Pleuropulmonary Blastoma Registry has 350 cases reported worldwide and has found only 9 cases of prenatally diagnosed lesions that turned out to be pleuropulmonary blastoma
A 2021 Journal of Pediatric Surgery study examined whether previous infection matters for thoracoscopic surgery outcomes in congenital lung malformations
The study was retrospective and looked at about 90 patients undergoing thoracoscopic lung resections
Patients without prior pulmonary infection had shorter operative time, fewer postoperative fevers, less need for postoperative antibiotics, but no significant difference in postoperative complications or conversion rates
After infection, there is a higher rate of conversion from thoracoscopy to open surgery
A 2018 Journal of Pediatric Surgery study examined optimal timing for elective resection of asymptomatic CPAM, dividing patients under 1 year into three groups: 1-3 months, 4-6 months, and 6-12 months
Operative time increased with each increase in age; at younger ages the tissue planes are easier to dissect
The 1-3 month group had the shortest operative time at 115 minutes compared to 163 minutes in the 6-12 month group
There were no differences in major complications, conversion rates, or readmissions between the three age groups
Kansas City showed that complication rate of operating on perforated appendix with abscess is the same as interval appendectomy, analogous to the CPAM timing question