# An Unusual Presentation of Membranous Nephropathy in an Adult With Arthrogryposis: A Case Report

## TL;DR

A 22-year-old man with arthrogryposis presented with a rare case of membranous nephropathy, highlighting the importance of early detection.

## Contribution

This case report presents an unusual presentation of membranous nephropathy in a patient with arthrogryposis.

## Key findings

- A 22-year-old male with arthrogryposis multiplex congenita presented with flank pain and hematuria.
- Biopsy confirmed primary membranous nephropathy with significant proteinuria.
- Early detection is emphasized to prevent complications like hypercoagulable state.

## Abstract

Membranous nephropathy (MN) is an autoimmune condition that is a common cause of nephrotic syndrome in nondiabetic adults. In this study, we highlight a case of a 22-year-old male with a past medical history of arthrogryposis multiplex congenita (AMC) who initially presented with right flank pain and hematuria. Subsequent workup revealed significant proteinuria with biopsy-proven primary MN. Early detection of the disease is critical to establish treatment promptly and prevent complications such as those resulting from a hypercoagulable state.