ICD10 code of Catamenial Pneumothorax and ICD9 code

Catamenial pneumothorax does not have a unique, dedicated ICD-10 or ICD-9 code; instead, it is typically coded under the broader category of spontaneous pneumothorax. Clinicians generally use ICD-10 code J93.81 (Primary spontaneous pneumothorax) or J93.83 (Other pneumothorax) in conjunction with secondary codes for endometriosis, such as N80.8 (Endometriosis of other specified sites).

What is the clinical definition of Catamenial Pneumothorax?

Catamenial pneumothorax is a rare form of recurrent pneumothorax that occurs in women within 72 hours before or after the onset of menstruation. It is the most common manifestation of thoracic endometriosis syndrome. While the underlying mechanism is not fully understood, it is hypothesized that endometrial tissue implants on the diaphragm or pleura, leading to air entering the pleural space during the menstrual cycle.

How is Catamenial Pneumothorax diagnosed?

Diagnosis of Catamenial pneumothorax is often delayed due to its cyclical nature. Physicians rely on a combination of patient history, high-resolution computed tomography (HRCT) of the chest, and video-assisted thoracoscopic surgery (VATS). VATS remains the gold standard for confirming the presence of thoracic endometriosis and identifying diaphragmatic fenestrations or lesions associated with Catamenial pneumothorax.

What are the common clinical features?

Patients with Catamenial pneumothorax typically present with chest pain, shortness of breath, and sometimes shoulder pain during their menstrual period. Based on data from the DiseaseMaps.org community, 21 members have shared their experiences, highlighting the isolation often felt due to the diagnostic delay of this condition. Key clinical observations include:

• Recurrent right-sided pneumothorax (occurring in over 90% of cases).


• Cyclical symptoms occurring strictly within a 72-hour window of menstruation.


• Presence of diaphragmatic or pleural nodules identified during surgical exploration.


• Correlation with pelvic endometriosis in approximately 30-50% of diagnosed patients.

Next steps

• Consult a thoracic surgeon or a gynecologist specializing in endometriosis to discuss surgical management, such as pleurodesis or resection of endometrial implants.


• Keep a detailed symptom diary tracking your menstrual cycle alongside any respiratory symptoms to assist your medical team.


• Connect with the 21 peers at DiseaseMaps.org who are navigating Catamenial pneumothorax to share experiences and coping strategies.

Medical disclaimer: This information is for educational purposes only and does not replace professional medical advice, diagnosis, or treatment from your healthcare provider.

References

• NIH Genetic and Rare Diseases Information Center (GARD): Thoracic Endometriosis Syndrome.


• Orphanet: Rare diseases database and clinical resources.


• PubMed: Current clinical literature on thoracic endometriosis and pneumothorax.


• Endometriosis Foundation of America: Resources for thoracic endometriosis awareness.