Let’s start with an initial problem representation:
A 55 y/o M w/ no known PMH except a 30 pack-year history of tobacco abuse presents with recurrent syncope (lightheaded prodrome) over last 2 mon along w/ R shoulder pain, 15 lb weight loss for 3 months, and an occasional cough
An initial evaluation of syncope should involve ruling out mimickers like Sz or TIA
The fact that he was lying down during the episode is concerning for cardiogenic cause like an arrhythmia
Also, an autonomic given the lightheadedness while lying in bed
I wonder about a possible SVC syndrome or mass around carotid causing unilateral carotid compression
never forget cardiac shunts and Eisenmenger syndrome even in adults
What about pulm HTN as cause of syncope w/ liver congestion⏩shoulder pain?
Is referred shoulder pain td to palpation? Seems to point to tissue. Maybe an abscess or mets to scapula
Could also think of Subclavian Steal syndrome ⏩syncope
Any B symptoms?? other than weight loss
He did have recent travel to Vietnam:
Seems like the timing of all symptoms started after returning from Vietnam, but if they have a mechanical cause of syncope like malignancy you’d expect that to have been developing for longer and unrelated to the travel. Signal vs noise?
Shoulder pain, weightloss, syncope - worried about lung cancer or TB
His vitals show no fever, a normal BP but he has bradycardia at 51 bpm
bradycardia > infiltrative dz > heart block
His physical exam shows R scapula td w/ normal lung and heart sounds, no lymphadenopathy
His labs show a nml WBC of 10, Hgb 13, Plt 400
Chemistry panel WNL (nml calcium)
Nml Alk phos (was interesting in seeing if this was elevated 2/2 bony mets)
Nml albumin:
How much does Albumin correlate with weight loss?
Serum albumin levels may not correlate with weight status in severe anorexia nervosa
Here’s another: pubmed.ncbi.nlm.nih.gov/25912205/ Albumin is a good negative acute phase reactant, but not great for nutritional status
The "markers" failed to identify subjects with severe protein-calorie malnutrition until extreme starvation.
Chest xray is interesting and likely the pivot point showing a LUL mass
Weird that lung mass is in L upper lobe, but having R shoulder pain
Hmmm, we need more imaging. How about a CT scan
CT chest showing a large left lung mass, lymphadenopathy (none palpable) along with a lytic lesion in the right scapula
Man that CT is better than our exam but that is not unusual
Maybe this mass is compressing the vagus nerve
Also note that recurrent laryngeal nerve is more medial than vagus (if we remember correctly so if it's impinging RLN then likely also compressing vagal nerve
Biopsy of scapula showed squamous cell carcinoma
PET showed a LUL hypermetabolic lesion w/ vagus nerve impingement, mediastinal mass w/ RLN impingement ⏩ bradycardia & syncope
Hematogenous dissemination then can occur typically 4 to 10 weeks later, giving rise to secondary syphilis. <40% of pts w/ syphilis have primary syphilis diagnosed. These “Secondary” lesions last for several weeks before spontaneously resolving. Coined “early, latent infection”
What does late infection mean? When syphilitic lesions recur after 1 year from the initial eruption, or seropositivity is detected more than 1 year after the initial eruption, it is termed late latent syphilis.
Some optics neuritis pearls in a short #Medtweetorial 🧵…. We all know that optic neuritis is frequently associated with multiple sclerosis (MS). But optic nerve inflammation can exist from autoimmunity, infection, granulomatous disease, paraneoplastic disorders, & demyelination
Classical ON from MS is unilateral, moderate, painful color vision loss with an afferent pupillary defect & normal fundus examination.
In those with ON, 95% of patients showed unilateral vision loss & 92% had associated retroorbital pain that frequently worsened w/ eye movement.
If you have not listened to the @CuriousClinPod most recent podcast (Episode 10: Why does metronidazole treat both bacterial and parasitic infections?) then I suggest you tune in.
I'll summarize their show notes here in short #medtweetorial
First a question:
Was metronidazole first used as an antibiotic or as an antiparasitic?
If you guessed antiparasitic, then you would be correct!
It was developed in the 1950s to treat the parasite trichomonas & then was used in the 1960s to treat other parasitic infections, like giardia and amoebiasis.
A 31-year-old M born and raised in Brazil w/ no PMH presented with a 3 mon history of worsening DOE, orthopnea, 7kg weight loss, abdominal distention, dry cough, and syncope
An interesting fact from @3owllearning : Depending on the clinical problems, the studies of disease probability for differential diagnosis often show 10 - 25% of cases are unexplained, even after careful examination and testing.