A Case of Organized Chronic Subdural Hematoma With Membrane Thickening: The “Mud‐Sand” Type

ABSTRACT Organized chronic subdural hematoma (OCSH) is a rare condition, and there are currently no standardized, effective diagnostic and treatment guidelines in clinical practice. The onset may be insidious, and clinicians should be alert to the possibility, even in the absence of typical subjective symptoms from the patient. This paper presents a case of “mud‐sand” type OCSH with membrane thickening, which had an insidious onset and was successfully treated by craniotomy to remove the hematoma.