# Unusual Pulmonary Manifestation in a Child With Congenital Mitral Stenosis: A Case Report

## TL;DR

A child with a rare heart condition developed lung issues and was successfully treated with surgery.

## Contribution

Highlights a rare association between congenital mitral stenosis and pulmonary hemosiderosis in a child.

## Key findings

- A six-year-old child with congenital mitral stenosis developed pulmonary hypertension and hemosiderosis.
- Surgical repair through papillary muscle splitting and commissurotomy successfully managed the condition.
- The case illustrates the rare link between mitral stenosis and pulmonary hemosiderosis in pediatric patients.

## Abstract

Congenital mitral valve stenosis (MVS) in children is usually isolated. However, it is, in rare cases, associated with secondary pulmonary hemosiderosis. It is hypothesized that secondary pulmonary hemosiderosis results from chronic pulmonary venous congestion and repeated microvascular hemorrhage due to elevated left atrial pressure. We describe the case of a six-year-old child with congenital severe MVS who developed coexisting pulmonary hypertension and hemosiderosis. The child was successfully managed with surgical repair of MVS through papillary muscle splitting and commissurotomy. This case illustrates the rare association between MVS and pulmonary hemosiderosis in a child with easy fatiguability and heart failure symptoms.