Six months have passed since scaly, irritating rashes first appeared on my elbows and knees. Based on my family’s medical history, my doctor thought it was psoriasis.

Two months later, a much larger, much more painful blistering rash appeared on my left arm. Another massive rash formed across the crest of my shoulders through my lower neck and across my chest.

This third rash—called a shawl rash by doctors—is characteristic of dermatomyositis. Add in what look exactly like all these other rashes along my joints (called Gottron signs), the results from two skin biopsies and from my blood tests, and I thought my dermatologist correctly diagnosed me.

However, yesterday’s visit to a well-regarded Phoenix rheumatologist put me right back where I was a month ago. We know I have an autoimmune disease. But after looking at the pathology reports and examining me, he hesitated to jump to a conclusion.

This is the point in an episode of House, MD, where the title character stares at his patient while his body fails him. Family demands to know what’s wrong. House replies, “I don’t know.”

Turns out, my skin biopsies only rule out psoriasis and fungal infection and confirm my immune system is attacking my skin. But as I mentioned in an earlier post, there are probably more quarterbacks capable of winning a Super Bowl than there are dermatopathologists who can differentiate dermatomyositis from lupus under a microscope.

Blood tests, at this stage, are also inconclusive. My labs show elevated aldolase—an enzyme that helps convert glucose into energy and points toward muscle damage. But all the tests for antibodies associated with myositis came back negative, except for one, which was barely detectable.

The rheumatologist also thinks my antinuclear antibodies are much too high for a typical dermatomyositis case. He also doesn’t think my muscles are weak enough.

All he is willing to conclude is I have interface dermatitis and dyspnea—that’s Greek for a complicated rash and shortness of breath.

This is the point in an episode of House, MD, where the title character stares at his patient while blood appears in the urine bag. Family members demand to know what’s wrong. House replies, “I don’t know.”

“I need answers, not tests, people,” I want to scream.

He re-assembles his team around the glass table, writes “kidney failure” on the white board and pours himself a cup of coffee.

“I need ideas, people,” he barks at his hand-selected team of doctors.

No, my kidneys are not failing. And yes, my doctors know much more about my condition than House’s team does 33 minutes into an episode. But like House, my rheumatologist ordered more tests. I need a CT scan of my lungs. I need my urine analyzed. And my blood has been sent to a lab specializing in detecting antibodies and other biomarkers associated with autoimmune conditions.

“I need answers, not tests, people,” I want to scream.

To make the House parallels worse, my rheumatologist has suggested lupus. Where’s a wise-cracking misanthropic diagnostician when you need him?