Human pathology

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cartilaginous variant of congenital pulmonary airways malformation

Cartilaginous variant of congenital adenomatoid malformation, cartilaginous variant of CCAM, cartilaginous variant of CPAM,

Cartilaginous variant of congenital pulmonary airways malformation is a unusual variant of congenital cystic adenomatoid malformation (CCAM).

Synopsis

- proliferation of malformed bronchiolar structures
- branching cartilaginous plates within the walls of the cystically-dilated airways
- abundant cartilage in the walls of branching malformed distal airways
- solid areas with groups of smaller airways with occasional cartilage islands
- immature alveolar structures compressed between malformed bronchioles
- bronchiolar epithelium composed of cuboidal or columnar cells

Differential diagnosis

- pulmonary chondroid hamartoma

Case records

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Reference

- Benning TL, Godwin JD, Roggli VL, Askin FB. Cartilaginous variant of congenital adenomatoid malformation of the lung. Chest. 1987 Sep;92(3):514-6. PMID: 3622030

- Bale PM. Congenital cystic malformation of the lung. A form of congenital bronchiolar ("adenomatoid") malformation. Am J Clin Pathol. 1979 Apr;71(4):411-20. PMID: 571674